Product Folder Sample & Buy Support & Community Tools & Software Technical Documents ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 ADS54J66 Quad-Channel, 14-Bit, 500-MSPS ADC with Integrated DDC 1 Features 3 Description • • • • • • • The ADS54J66 is a low-power, wide-bandwidth, 14bit, 500-MSPS, quad-channel, telecom receiver device. The ADS54J66 supports a JESD204B serial interface with data rates up to 10 Gbps with one lane per channel. The buffered analog input provides uniform input impedance across a wide frequency range and minimizes sample-and-hold glitch energy. The ADS54J66 provides excellent spurious-free dynamic range (SFDR) over a large input frequency range with very low power consumption. The digital signal processing block includes complex mixers followed by low-pass filters with decimate-by-2 and -4 options supporting up to 200-MHz receive bandwidth. 1 • • • • • Quad Channel 14-Bit Resolution Maximum Clock Rate: 500 MSPS Input Bandwidth (3 dB): 900 MHz On-Chip Dither Analog Input Buffer with High-Impedance Input Output Options: – Rx: Decimate-by-2 and -4 Options with Low-Pass Filter – 200-MHz Complex Bandwidth or 100-MHz Real Bandwidth Support – DPD FB: 500 MSPS 1.9-VPP Differential Full-Scale Input JESD204B Interface: – Subclass 1 Support – 1 Lane per ADC Up to 10 Gbps – Dedicated SYNC Pin for Pair of Channels Support for Multi-Chip Synchronization 72-Pin VQFN Package (10 mm × 10 mm) Key Specifications: – Power Dissipation: 675 mW/ch – Spectral Performance (Un-Decimated) – fIN = 190 MHz IF at –1 dBFS: – SNR: 69.5 dBFS – NSD: –153.5 dBFS/Hz – SFDR: 86 dBc (HD2, HD3), 93 dBFS (Non HD2, HD3) – fIN = 370 MHz IF at –3 dBFS: – SNR: 68.5 dBFS – NSD: –152.5 dBFS/Hz – SFDR: 81 dBc (HD2, HD3), 86 dBFS (Non HD2, HD3) 2 Applications The JESD204B interface reduces the number of interface lines, thus allowing high system integration density. An internal phase-locked loop (PLL) multiplies the incoming analog-to-digital converter (ADC) sampling clock to derive the bit clock, which is used to serialize the 14-bit data from each channel. Device Information(1) PART NUMBER PACKAGE ADS54J66 BODY SIZE (NOM) VQFN (72) 10.00 mm x 10.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Block Diagram INAP, INAM Digital Block Interleaving Correction 14-Bit ADC 2x 4x INBP, INBM Digital Block Interleaving Correction 14-Bit ADC JESD204B 2x K x fS / 16 TRIGAB TRIGCD TRDYAB SYSREFP, SYSREFM TRDYCD CLKINP, CLKINM PLL x10, x20 SYNCbAB SYNCbCD INCP, INCM Digital Block Interleaving Correction 14-Bit ADC Digital Block Interleaving Correction 14-Bit ADC DCP, DCM 2x JESD204B 4x K x fS / 16 DDP, DDM 2x fS / 8 Configuration Registers SCLK SEN SDIN SDOUT INDP, INDM RESET SCAN_EN Radar and Antenna Arrays Broadband Wireless and Digitizers Cable CMTS, DOCSIS 3.1 Receivers Communications Test Equipment Microwave Receivers Software Defined Radio (SDR) DBP, DBM fS / 8 fS / 4 • • • • • • DAP, DAM fS / 4 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Table of Contents 1 2 3 4 5 6 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 7 1 1 1 2 3 5 Absolute Maximum Ratings ...................................... 5 ESD Ratings.............................................................. 5 Recommended Operating Conditions....................... 6 Thermal Information .................................................. 6 Electrical Characteristics........................................... 7 AC Performance ...................................................... 8 Digital Characteristics ............................................. 10 Timing Characteristics............................................. 11 Typical Characteristics: General (DDC Mode-8)..... 12 Typical Characteristics: Mode 2............................ 19 Typical Characteristics: Mode 0............................ 20 Detailed Description ............................................ 21 7.1 Overview ................................................................. 21 7.2 7.3 7.4 7.5 7.6 8 Functional Block Diagram ....................................... Feature Description................................................. Device Functional Modes........................................ Programming .......................................................... Register Maps ......................................................... 21 22 23 31 41 Application and Implementation ........................ 69 8.1 Application Information............................................ 69 8.2 Typical Application .................................................. 73 9 Power Supply Recommendations...................... 74 10 Layout................................................................... 75 10.1 Layout Guidelines ................................................. 75 10.2 Layout Example .................................................... 75 11 Device and Documentation Support ................. 76 11.1 11.2 11.3 11.4 Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 76 76 76 76 12 Mechanical, Packaging, and Orderable Information ........................................................... 76 4 Revision History Changes from Original (November 2015) to Revision A Page • Changed Table 8: changed several comments, added rows .............................................................................................. 29 • Changed Figure 84: changed last value of JESD bank page address ............................................................................... 41 • Changed Table 15: changed ADC page registers 5Fh to 6Dh............................................................................................. 42 • Changed description of decimation mode 0 to mode 4 in Example Register Writes section: deleted (default) ................. 44 • Changed Register 5Fh, Register 60h, and Register 61h .................................................................................................... 51 • Changed Register 6Ch and Register 6Dh ........................................................................................................................... 52 • Changed Start-Up Sequence section .................................................................................................................................. 69 2 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 5 Pin Configuration and Functions SYNCbCDP SYNCbCDM IOVDD DDP DDM DGND DCP DCM IOVDD DGND DBM DBP DGND DAM DAP IOVDD SYNCbABM SYNCbABP RMP Package 72-Pin VQFN Top View 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 50 PDN SCLK 6 49 RES SEN 7 48 RESET DVDD 8 47 DVDD AVDD 9 GND Pad 46 AVDD AVDD3V 10 (Back Side) 45 AVDD3V SDOUT 11 44 AVDD AVDD 12 43 AVDD INDP 13 42 INAP INDM 14 41 INAM AVDD 15 40 AVDD AVDD3V 16 39 AVDD3V AVDD 17 38 AVDD INCM 18 37 INBM 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 INBP 5 AVDD SDIN SYSREFM IOVDD SYSREFP 51 AGND 4 AVDD3V IOVDD AVDD DGND AGND 52 CLKINM 3 CLKINP DGND AGND NC AVDD 53 AVDD3V 2 NC NC NC NC AGND 54 AVDD 1 INCP NC Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 3 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Pin Functions PIN NAME NUMBER I/O DESCRIPTION INPUT, REFERENCE INAM 41 INAP 42 INBM 37 INBP 36 INCM 18 INCP 19 INDM 14 INDP 13 I Differential analog input pins for channel A I Differential analog input pins for channel B I Differential analog input pins for channel C I Differential analog input pins for channel D I Differential clock input pins for the ADC I External sync input pins O JESD204B Serial data output pins for channel A O JESD204B Serial data output pins for channel B O JESD204B Serial data output pins for channel C O JESD204B Serial data output pins for channel D 1, 2, 22, 23, 53, 54 – Do not connect PDN 50 I/O RES 49 – Reserve pin. Connect to GND RESET 48 I Hardware reset. Active high. This pin has an internal 150-kΩ pulldown resistor. SCLK 6 I Serial interface clock input CLOCK, SYNC CLKINM 28 CLKINP 27 SYSREFM 34 SYSREFP 33 CONTROL, SERIAL DAM 59 DAP 58 DBM 62 DBP 61 DCM 65 DCP 66 DDM 68 DDP 69 NC Power down. Can be configured via SPI register setting. SDIN 5 I Serial interface data input. SDOUT 11 O Serial interface data output. SEN 7 I Serial interface enable SYNCbABM 56 SYNCbABP 55 I Synchronization input pins for JESD204B port channel A, B. Can be configured via SPI to SYNCb signal for all four channels. Needs external termination. SYNCbCDM 71 SYNCbCDP 72 I Synchronization input pins for JESD204B port channel C, D. Can be configured via SPI to SYNCb signal for all four channels. Needs external termination. 4 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 Pin Functions (continued) PIN NAME NUMBER I/O DESCRIPTION POWER SUPPLY AGND 21, 26, 29, 32 I Analog ground AVDD 9, 12, 15, 17, 20, 25, 30, 35, 38, 40, 43, 44, 46 I Analog 1.9-V power supply AVDD3V 10, 16, 24, 31, 39, 45 I Analog 3 V for analog buffer DGND 3, 52, 60, 63, 67 I Digital ground DVDD 8, 47 I Digital 1.9-V power supply IOVDD 4, 51, 57, 64, 70 I Digital 1.15-V power supply for the JESD204B transmitter 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) Supply voltage range MIN MAX AVDD3V –0.3 3.6 AVDD –0.3 2.1 DVDD –0.3 2.1 IOVDD –0.2 1.4 Voltage between AGND and DGND Voltage applied to input pins V –0.3 0.3 INAP, INBP, INAM, INBM, INCP, INDP, INCM, INDM –0.3 3 CLKINP, CLKINM –0.3 AVDD + 0.3 SYSREFP, SYSREFM –0.3 AVDD + 0.3 SCLK, SEN, SDIN, RESET, SPI_MODE, SYNCbABP, SYNCbABM, SYNCbCDP, SYNCbCDM, PDN –0.2 2 –65 150 Storage temperature, Tstg (1) UNIT V V °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 6.2 ESD Ratings V(ESD) (1) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) VALUE UNIT ±1000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 5 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) MIN AVDD3V Supply voltage range Analog inputs 2.85 3 3.6 1.8 1.9 2 DVDD 1.8 1.9 2 IOVDD 1.1 1.15 1.2 Differential input voltage range 1.9 Input common-mode voltage Input clock amplitude differential (VCLKP – VCLKM) (1) (2) 250 1.5 LVPECL, ac-coupled 1.6 LVDS, ac-coupled 0.7 Operating free-air, TA 45% Operating junction, TJ MHz VPP 50% 55% 105 (2) 125 –40 V V 500 Sine wave, ac-coupled UNIT VPP 2.0 ± 0.025 Input device clock duty cycle, default after reset Temperature MAX AVDD Input clock frequency, device clock frequency Clock inputs NOM 85 ºC SYSREF must be applied for the device initialization. Prolonged use above this junction temperature can increase the device failure-in-time (FIT) rate. 6.4 Thermal Information ADS54J66 THERMAL METRIC (1) RMP (VQFNP) UNIT 72 PINS RθJA Junction-to-ambient thermal resistance 22.3 °C/W RθJC(top) Junction-to-case (top) thermal resistance 5.1 °C/W RθJB Junction-to-board thermal resistance 2.4 °C/W ψJT Junction-to-top characterization parameter 0.1 °C/W ψJB Junction-to-board characterization parameter 2.3 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 0.4 °C/W (1) 6 For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 6.5 Electrical Characteristics typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 500 MSPS GENERAL ADC sampling rate Resolution 14 Bits POWER SUPPLY AVDD3V 3-V analog supply 2.85 3 3.6 V AVDD DVDD 1.9-V analog supply 1.8 1.9 2 V 1.9-V digital supply 1.8 1.9 2 V IOVDD 1.15-V SERDES supply 1.1 1.15 1.2 IAVDD3V 3-V analog supply current 370-MHz, full-scale input on all four channels 340 mA IAVDD 1.9-V analog supply current 370-MHz, full-scale input on all four channels 365 mA 2x decimation (4 channels), 370 MHz, full-scale input on all four channels 190 DDC mode-8 (no decimation), 370 MHz, full-scale input on all four channels 184 DDC mode-8 (no decimation), 370 MHz, full-scale input on all four channels 533 2x decimation (4 channels), 370 MHz, full-scale input on all four channels 2.68 DDC mode-8 (no decimation), 370 MHz, full-scale input on all four channels 2.67 Full-scale input on all four channels 250 mW 1.9 VPP IDVDD IIOVDD Pdis 1.9-V digital supply current 1.15-V SERDES supply current Total power dissipation Global power-down power dissipation V mA mA W ANALOG INPUTS Differential input full-scale voltage Input common-mode voltage Differential input resistance At fIN = 370 MHz Differential input capacitance At fIN = 370 MHz Analog input bandwidth (3 dB) 2.0 V 0.5 kΩ 2.5 pF 900 MHz ISOLATION Crosstalk (1) isolation between near channels (channels A and B are near to each other, channels C and D are near to each other) Crosstalk (1) isolation between far channels (channels A and B, and channels C and D are far channels) fIN = 10 MHz 105 fIN = 100 MHz 104 fIN = 170 MHz 96 fIN = 270 MHz 97 fIN = 370 MHz 93 fIN = 470 MHz 85 fIN = 10 MHz 110 fIN = 100 MHz 107 fIN = 170 MHz 96 fIN = 270 MHz 97 fIN = 370 MHz 95 fIN = 470 MHz 94 dBFS dBFS CLOCK INPUT Internal clock biasing (1) CLKINP and CLKINM pins are connected to internal biasing voltage through 400 Ω 1.15 V Crosstalk is measured with a –1-dBFS input signal on aggressor channel and no input on the victim channel. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 7 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 6.6 AC Performance over operating free-air temperature range (unless otherwise noted) PARAMETER SNR Signal-to-noise ratio TEST CONDITIONS NO DECIMATION, 500-MSPS OUTPUT (DDC Mode 8) DECIMATE-BY-2, 250-MSPS OUTPUT (DDC Mode 2) MIN MIN 70.5 74 fIN = 190 MHz, AIN = –1 dBFS 69.5 73.2 70.3 73.6 69 72.6 fIN = 190 MHz, AIN = –3 dBFS 65.6 fIN = 300 MHz 72 68.4 71.5 fIN = 470 MHz 67.5 70.7 fIN = 10 MHz 154.8 155.1 fIN = 70 MHz 154.5 155 fIN = 190 MHz, AIN = –1 dBFS 153.5 154.2 fIN = 190 MHz, AIN = –3 dBFS SFDR Signal-to-noise and distortion ratio Spurious-free dynamic range 149.6 154.3 154.6 fIN = 300 MHz 153 153.6 fIN = 350 MHz 152.7 153 148.6 152.4 152.5 fIN = 470 MHz 151.5 151.7 fIN = 10 MHz 70.7 73.9 fIN = 70 MHz 70.4 73.9 fIN = 190 MHz, AIN = –1 dBFS 69.4 73.1 fIN = 190 MHz, AIN = –3 dBFS 70.2 73.5 fIN = 300 MHz 68.9 72.5 fIN = 350 MHz 68.6 71.7 fIN = 370 MHz 68.2 fIN = 470 MHz 66.9 69.7 fIN = 10 MHz 89 88 fIN = 70 MHz 87 95 fIN = 190 MHz, AIN = –1 dBFS 86 97 88 96 82 94 82 82 fIN = 190 MHz, AIN = –3 dBFS 78 fIN = 300 MHz fIN = 350 MHz fIN = 370 MHz 75 73 fIN = 10 MHz 89 91 fIN = 70 MHz 94 103 86 101 88 HD2 101 fIN = 300 MHz 82 97 fIN = 350 MHz 82 82 fIN = 190 MHz, AIN = –3 dBFS fIN = 370 MHz 78 75 fIN = 470 MHz 8 dBFS/Hz dBFS dBc 74 dBc 81 73 Submit Documentation Feedback dBFS 81 fIN = 470 MHz fIN = 190 MHz, AIN = –1 dBFS Second-order harmonic distortion MAX 74.1 68.7 64.6 fIN = 370 MHz SINAD TYP fIN = 70 MHz fIN = 370 MHz Noise spectral density MAX 70.8 fIN = 350 MHz NSD TYP fIN = 10 MHz UNIT 74 Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 AC Performance (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER HD3 Third-order harmonic distortion TEST CONDITIONS NO DECIMATION, 500-MSPS OUTPUT (DDC Mode 8) DECIMATE-BY-2, 250-MSPS OUTPUT (DDC Mode 2) MIN MIN TYP fIN = 70 MHz 87 99 fIN = 190 MHz, AIN = –1 dBFS 98 100 97 98 95 100 90 96 fIN = 190 MHz, AIN = –3 dBFS 78 fIN = 300 MHz fIN = 370 MHz Spurious-free dynamic range (excluding HD2, HD3) 75 83 83 94 98 fIN = 70 MHz 94 95 fIN = 190 MHz, AIN = –1 dBFS 93 97 IMD3 Total harmonic distortion Two-tone, third-order intermodulation distortion 87 93 96 fIN = 300 MHz 92 94 fIN = 350 MHz 91 94 80 87 93 fIN = 10 MHz 88 86 fIN = 70 MHz 85 92 fIN = 190 MHz, AIN = –1 dBFS 85 92 fIN = 190 MHz, AIN = –3 dBFS 86 91 fIN = 300 MHz 81 89 fIN = 350 MHz 79 82 fIN = 370 MHz 78 fIN = 470 MHz 72 fIN = 185 MHz, fIN = 190 MHz, AIN = –7 dBFS 89 fIN = 365 MHz, fIN = 370 MHz, AIN = –7 dBFS 82 fIN = 465 MHz, fIN = 470 MHz, AIN = –7 dBFS 77 dBc 73 dBFS Submit Documentation Feedback Product Folder Links: ADS54J66 dBc 90 fIN = 470 MHz Copyright © 2015, Texas Instruments Incorporated dBc 85 fIN = 10 MHz fIN = 190 MHz, AIN = –3 dBFS MAX 88 fIN = 470 MHz fIN = 370 MHz THD TYP 93 fIN = 350 MHz Non HD2, HD3 MAX fIN = 10 MHz UNIT 9 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 6.7 Digital Characteristics typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling rate = 500 MSPS, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, and –1-dBFS differential input (unless otherwise noted) PARAMETER DIGITAL INPUTS (RESET, SCLK, SEN, SDIN, PDN) TEST CONDITIONS MIN 0.8 VIH High-level input voltage All digital inputs support 1.2-V and 1.8-V logic levels VIL Low-level input voltage All digital inputs support 1.2-V and 1.8-V logic levels IIH High-level input current IIL Low-level input current TYP MAX UNIT (1) V 0.4 SEN 0 RESET, SCLK, SDIN, PDN µA 100 SEN 50 RESET, SCLK, SDIN, PDN V µA 0 DIGITAL INPUTS (SYSREFP, SYSREFM, SYNCbABM, SYNCbABP, SYNCbCDM, SYNCbCDP) VD Differential input voltage V(CM_DIG) Common-mode voltage for SYSREF 0.35 0.45 1.4 V 1.3 V DVDD V DIGITAL OUTPUTS (SDOUT, PDN) VOH High-level output voltage VOL Low-level output voltage DVDD – 0.1 0.1 V DIGITAL OUTPUTS (JESD204B Interface: DxP, DxM) (2) VOD Output differential voltage VOC Output common-mode voltage Transmitter short-circuit current zos (2) 10 Transmitter pins shorted to any voltage between –0.25 V and 1.45 V Single-ended output impedance Output capacitance (1) With default swing setting Output capacitance inside the device, from either output to ground 700 mVPP 450 mV –100 100 mA 50 Ω 2 pF The RESET, SCLK, SDATA, and PDN pins have a 20-kΩ (typical) internal pulldown resistor to ground, and the SEN pin has a 20-kΩ (typical) pull up resistor to IOVDD. 50-Ω, single-ended external termination to IOVDD. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 6.8 Timing Characteristics typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling rate = 500 MSPS, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, and –1-dBFS differential input (unless otherwise noted) MIN TYP MAX UNIT SAMPLE TIMING CHARACTERISTICS Aperture delay 0.75 1.6 Aperture delay matching between two channels on the same device ns ±70 Aperture delay matching between two devices at the same temperature and supply voltage ps ±270 ps Aperture jitter 135 fS rms Wake-up time to valid data after coming out of global power-down 150 µs Data latency : ADC sample to digital output 77 Input clock cycles OVR latency: ADC sample to OVR bit 44 Input clock cycles 4 ns (1) tPDI Clock propagation delay: input clock rising edge cross-over to output clock rising edge crossover tSU_SYSREF Setup time for SYSREF, referenced to input clock rising edge 300 tH_SYSREF Hold time for SYSREF, referenced to input clock rising edge 100 900 ps ps JESD OUTPUT INTERFACE TIMING CHARACTERISTICS Unit interval 100 400 ps Serial output data rate 2.5 10 Gbps Total jitter for BER of 1E-15 and lane rate = 10 Gbps 26 Random jitter for BER of 1E-15 and lane rate = 10 Gbps tR, tF (1) 0.75 ps ps rms Deterministic jitter for BER of 1E-15 and lane rate = 10 Gbps 12 ps, pk-pk Data rise time, data fall time: rise and fall times measured from 20% to 80%, differential output waveform, 2.5 Gbps ≤ bit rate ≤ 10 Gbps 35 ps Overall ADC latency = data latency + tPDI. N+1 N+2 N Sample tPD Data Latency: 77 Clock Cycles CLKINP CLKINM DAP, DAM DBP, DBM DCP, DCM DDP, DDM D20 Sample N-1 D1 Sample N D20 Sample N+1 Figure 1. Latency Timing Diagram Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 11 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 6.9 Typical Characteristics: General (DDC Mode-8) 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) -40 -60 -80 -40 -60 -80 -100 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 0 250 fIN = 10 MHz , AIN = –1 dBFS, SNR = 71 dBFS, SFDR = 89 dBc, SFDR = 89 dBc (non 23) 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) 200 250 D002 Figure 3. FFT for 140-MHz Input Signal 0 -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 50 D003 fIN = 190 MHz , AIN = –1 dBFS, SNR = 69.4 dBFS, SFDR = 88 dBc, SFDR = 96 dBc (non 23) 100 150 Input Frequency (MHz) 200 250 D004 fIN = 230 MHz , AIN = –1 dBFS, SNR = 69.4 dBFS, SFDR = 85 dBc, SFDR = 96 dBc (non 23) Figure 4. FFT for 190-MHz Input Signal Figure 5. FFT for 230-MHz Input Signal 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) 100 150 Input Frequency (MHz) fIN = 140 MHz , AIN = –1 dBFS, SNR = 70 dBFS, SFDR = 88 dBc, SFDR = 91 dBc (non 23) Figure 2. FFT for 10-MHz Input Signal -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 D005 fIN = 300 MHz , AIN = –3 dBFS, SNR = 69.4 dBFS, SFDR = 80 dBc, SFDR = 95 dBc (non 23) 50 100 150 Input Frequency (MHz) 200 250 D006 fIN = 370 MHz , AIN = –3 dBFS, SNR = 68.4 dBFS, SFDR = 84 dBc, SFDR = 86 dBc (non 23) Figure 6. FFT for 300-MHz Input Signal 12 50 D001 Submit Documentation Feedback Figure 7. FFT for 370-MHz Input Signal Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 Typical Characteristics: General (DDC Mode-8) (continued) 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 50 D007 fIN = 470 MHz , AIN = –3 dBFS, SNR = 67.4 dBFS, SFDR = 73 dBc, SFDR = 80 dBc (non 23) 250 D008 Figure 9. FFT for Two-Tone Input Signal 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) 200 fIN1 = 185 MHz, fIN2 = 190 MHz, IMD = 89 dBFS, each tone at –7 dBFS Figure 8. FFT for 470-MHz Input Signal -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 50 D009 fIN1 = 185 MHz, fIN2 = 190 MHz, IMD = 103 dBFS, each tone at –36 dBFS 100 150 Input Frequency (MHz) 200 250 D010 fIN1 = 370 MHz, fIN2 = 365 MHz, IMD = 81.7 dBFS, each tone at –7 dBFS Figure 10. FFT for Two-Tone Input Signal Figure 11. FFT for Two-Tone Input Signal 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) 100 150 Input Frequency (MHz) -40 -60 -80 -40 -60 -80 -100 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 50 D011 fIN1 = 370 MHz, fIN2 = 365 MHz, IMD = 102 dBFS, each tone at –36 dBFS Figure 12. FFT for Two-Tone Input Signal 100 150 Input Frequency (MHz) 200 250 D012 fIN1 = 470 MHz, fIN2 = 465 MHz, IMD = 76.7 dBFS, each tone at –7 dBFS Figure 13. FFT for Two-Tone Input Signal Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 13 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Typical Characteristics: General (DDC Mode-8) (continued) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) 0 -88 -90 -20 Amplitude (dBFS) -92 IMD (dBFS) -40 -60 -80 -94 -96 -98 -100 -100 -102 -120 0 50 100 150 Input Frequency (MHz) 200 -104 -35 250 -31 D013 fIN1 = 470 MHz, fIN2 = 465 MHz, IMD = 98.8 dBFS, each tone at –36 dBFS -27 -23 -19 -15 Each Tone Amplitude (dBFS) -11 -7 D014 fIN1 = 185 MHz, fIN2 = 190 MHz Figure 14. FFT for Two-Tone Input Signal Figure 15. Intermodulation Distortion vs Input Amplitude -80 -74 -84 -80 IMD (dBFS) IMD (dBFS) -88 -92 -86 -92 -96 -98 -100 -104 -35 -31 -27 -23 -19 -15 Each Tone Amplitude (dBFS) -11 -104 -35 -7 -31 D015 fIN1 = 365 MHz, fIN2 = 370 MHz -7 D016 Figure 17. Intermodulation Distortion vs Input Amplitude 96 96 Ain = -1 dBFS Ain = -3 dBFS 93 Interleaving Spur (dBc) 92 SFDR (dBc) -11 fIN1 = 465 MHz, fIN2 = 470 MHz Figure 16. Intermodulation Distortion vs Input Amplitude 88 84 80 90 87 84 81 76 78 72 0 40 80 120 160 200 240 280 320 360 400 440 480 Input Frequency (MHz) D017 0 40 Figure 18. Spurious-Free Dynamic Range vs Input Frequency 14 -27 -23 -19 -15 Each Tone Amplitude (dBFS) Submit Documentation Feedback 80 120 160 200 240 280 320 360 400 440 480 Input Frequency (MHz) D018 Figure 19. IL Spur vs Input Frequency Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 Typical Characteristics: General (DDC Mode-8) (continued) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) 71.5 72 AIN = -1 dBFS AIN = -3 dBFS 71.2 SNR (dBFS) SNR (dBFS) 70.5 AVDD = 1.8 V AVDD = 1.85 V AVDD = 1.9 V 69.5 68.5 67.5 AVDD = 1.95 V AVDD = 2 V 70.4 69.6 68.8 66.5 0 40 68 -40 80 120 160 200 240 280 320 360 400 440 480 Input Frequency (MHz) D019 -15 10 35 Temperature (°C) 60 85 D020 fIN = 190 MHz, AIN = –1 dBFS Figure 20. Signal-to-Noise Ratio vs Input Frequency Figure 21. Signal-to-Noise Ratio vs AVDD Supply and Temperature 72 93 AVDD = 1.8 V AVDD = 1.85 V AVDD = 1.9 V AVDD = 1.95 V AVDD = 2 V AVDD = 1.8 V AVDD = 1.85 V AVDD = 1.9 V 71 AVDD = 1.95 V AVDD = 2 V SNR (dBFS) SFDR (dBc) 91 89 70 69 68 87 67 85 -40 -15 10 35 Temperature (°C) 60 66 -40 85 -15 D021 fIN = 190 MHz, AIN = –1 dBFS 10 35 Temperature (°C) 60 85 D022 fIN = 370 MHz, AIN = –3 dBFS Figure 22. Spurious-Free Dynamic Range vs AVDD Supply and Temperature Figure 23. Signal-to-Noise Ratio vs AVDD Supply and Temperature 71.4 84 AVDD = 1.8 V AVDD = 1.85 V AVDD = 1.9 V DVDD = 1.75 V DVDD = 1.8 V DVDD = 1.85 V AVDD = 1.95 V AVDD = 2 V 71 DVDD = 1.9 V DVDD = 1.95 V DVDD = 2 V SNR (dBFS) SFDR (dBc) 83 82 70.6 70.2 81 69.8 80 -40 -15 10 35 Temperature (°C) 60 85 69.4 -40 D023 fIN = 370 MHz, AIN = –3 dBFS -15 10 35 Temperature (°C) 60 85 D024 fIN = 190 MHz, AIN = –1 dBFS Figure 24. Spurious-Free Dynamic Range vs AVDD Supply and Temperature Figure 25. Signal-to-Noise Ratio vs DVDD Supply and Temperature Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 15 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Typical Characteristics: General (DDC Mode-8) (continued) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) 92 71 DVDD = 1.75 V DVDD = 1.8 V DVDD = 1.85 V 91 DVDD = 1.9 V DVDD = 1.95 V DVDD = 2 V DVDD = 1.75 V DVDD = 1.8 V DVDD = 1.85 V DVDD = 1.9 V DVDD = 1.95 V DVDD = 2 V SNR (dBFS) SFDR (dBc) 70 90 89 69 88 68 87 86 -40 -15 10 35 Temperature (°C) 60 67 -40 85 -15 D025 fIN = 190 MHz, AIN = –1 dBFS 60 85 D026 fIN = 370 MHz, AIN = –3 dBFS Figure 26. Spurious-Free Dynamic Range vs DVDD Supply and Temperature Figure 27. Signal-to-Noise Ratio vs DVDD Supply and Temperature 72.2 84 DVDD = 1.75 V DVDD = 1.8 V DVDD = 1.85 V DVDD = 1.9 V DVDD = 1.95 V DVDD = 2 V AVDD3V = 2.85 V AVDD3V = 3 V AVDD3V = 3.1 V AVDD3V = 3.2 V 71.7 SNR (dBFS) 83 SFDR (dBc) 10 35 Temperature (°C) 82 AVDD3V = 3.3 V AVDD3V = 3.4 V AVDD3V = 3.5 V AVDD3V = 3.6 V 71.2 70.7 70.2 81 69.7 80 -40 -15 10 35 Temperature (°C) 60 69.2 -40 85 fIN = 370 MHz, AIN = –3 dBFS 85 D028 73 AVDD3V = 2.85 V AVDD3V = 3 V AVDD3V = 3.1 V AVDD3V = 3.2 V 91 AVDD3V = 3.3 V AVDD3V = 3.4 V AVDD3V = 3.5 V AVDD3V = 3.6 V 90 89 70 69 87 68 10 35 Temperature (°C) 60 85 AVDD3V = 3.3 V AVDD3V = 3.4 V AVDD3V = 3.5 V AVDD3V = 3.6 V 71 88 -15 AVDD3V = 2.85 V AVDD3V = 3 V AVDD3V = 3.1 V AVDD3V = 3.2 V 72 SNR (dBFS) SFDR (dBc) 60 Figure 29. Signal-to-Noise Ratio vs AVDD3V Supply and Temperature 92 67 -40 D029 fIN = 190 MHz, AIN = –1 dBFS -15 10 35 Temperature (°C) 60 85 D030 fIN = 370 MHz, AIN = –3 dBFS Figure 30. Spurious-Free Dynamic Range vs AVDD3V Supply and Temperature 16 10 35 Temperature (°C) fIN = 190 MHz, AIN = –1 dBFS Figure 28. Spurious-Free Dynamic Range vs DVDD Supply and Temperature 86 -40 -15 D027 Submit Documentation Feedback Figure 31. Signal-to-Noise Ratio vs AVDD3V Supply and Temperature Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 Typical Characteristics: General (DDC Mode-8) (continued) 74 84 AVDD3V = 2.85 V AVDD3V = 3 V AVDD3V = 3.1 V AVDD3V = 3.2 V SNR (dBFS) SFDR (dBc) 83 AVDD3V = 3.3 V AVDD3V = 3.4 V AVDD3V = 3.5 V AVDD3V = 3.6 V 82 72 150 SNR (dBFS) SFDR (dBc) SFDR (dBFS) 125 70 100 68 75 66 50 SFDR (dBc,dBFS) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) 81 10 35 Temperature (°C) 60 64 -70 85 25 -60 -50 D031 fIN = 370 MHz, AIN = –3 dBFS 120 69.5 90 68 60 66.5 30 -40 -30 Amplitude (dBFS) -20 -10 110 73 100 71 90 69 80 67 70 65 0.2 0 D033 Figure 34. Performance vs Amplitude Figure 35. Performance vs Clock Amplitude 125 73 95 SNR SFDR 72 100 69 75 66 50 63 25 0 2.2 SNR (dBFS) SNR SFDR SFDR (dBc) SNR (dBFS) D034 fIN = 190 MHz, AIN = –1 dBFS 75 0.6 1 1.4 1.8 Differential Clock Amplitude (Vpp) 60 2.2 0.6 1 1.4 1.8 Differential Clock Amplitude (Vpp) fIN = 370 MHz 60 0.2 D032 SNR SFDR 0 -50 0 75 SNR (dBFS) 71 -60 -10 Figure 33. Performance vs Amplitude SFDR (dBc,dBFS) SNR (dBFS) 72.5 180 SNR (dBFS) SFDR (dBc) SFDR (dBFS) 150 65 -70 -20 fIN = 190 MHz Figure 32. Spurious-Free Dynamic Range vs AVDD3V Supply and Temperature 74 -40 -30 Amplitude (dBFS) SFDR (dBc) -15 72 90 71 85 70 80 69 75 68 30 35 D035 fIN = 370 MHz, AIN = –3 dBFS 40 45 50 55 60 Input Clock Duty Cycle (%) 65 SFDR (dBc) 80 -40 70 70 D036 fIN = 190 MHz, AIN = –1 dBFS Figure 36. Performance vs Clock Amplitude Figure 37. Performance vs Clock Duty Cycle Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 17 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Typical Characteristics: General (DDC Mode-8) (continued) typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) 0 71 90 SNR SFDR 87 70 84 69 81 68 78 67 75 66 72 -100 69 70 -120 65 30 35 40 45 50 55 60 Input Clock Duty Cycle (%) 65 Amplitude (dBFS) -20 SFDR (dBc) SNR (dBFS) 72 -40 -60 -80 0 50 D037 fIN = 370 MHz, AIN = –3 dBFS 100 150 Input Frequency (MHz) 200 250 D038 fIN = 190 MHz , AIN = –1 dBFS SFDR = 49 dBc, fPSRR = 5 MHz, APSRR = 50 mVPP Figure 39. Power-Supply Rejection Ratio FFT for Test Signal on AVDD Supply Figure 38. Performance vs Clock Duty Cycle -10 0 PSRR with 50-mVPP Signal on AVDD PSRR with 50-mVPP Signal on AVDD3V -15 -20 Amplitude (dBFS) -20 PSRR (dB) -25 -30 -35 -40 -40 -60 -80 -45 -100 -50 -55 -120 0 50 100 150 200 250 Frequency of Signal on Supply (MHz) 300 0 fIN = 190 MHz, AIN = –1 dBFS 100 150 Input Frequency (MHz) 200 250 D040 fIN = 190 MHz , AIN = –1 dBFS SFDR = 81 , fCMRR = 5 MHz, ACMRR = 50 mVPP Figure 41. Common-Mode Rejection Ratio FFT Figure 40. Power-Supply Rejection Ratio vs Supplies 4 -20 Power Consumption (W) -25 -30 CMRR (dB) 50 D039 -35 -40 -45 -50 3.2 AVDD_Power (W) DVDD_Power (W) AVDD3V_Power (W) IOVDD_Power (W) TotalPower (W) 2.4 1.6 0.8 -55 -60 0 50 100 150 200 250 Frequency of Input Common-Mode Signal (MHz) 300 0 250 D041 300 350 400 Sampling Speed (MSPS) 450 500 D042 fIN = 190 MHz, AIN= –1 dBFS 50-mVPP test signal on input common-mode Figure 42. Common-Mode Rejection Ratio 18 Submit Documentation Feedback Figure 43. Power vs Chip Clock Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 6.10 Typical Characteristics: Mode 2 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) low-pass or high-pass decimation-by-2 filter selected as per input frequency; typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 25 50 75 Input Frequency (MHz) 100 125 0 fIN = 100 MHz, AIN = –1 dBFS, SNR = 74.1 dBFS, SFDR = 98 dBc, SFDR = 100 dBc (non 23) 50 75 Input Frequency (MHz) 100 125 D044 fIN = 150 MHz, AIN = –1 dBFS, SNR = 73.8 dBFS, SFDR = 99 dBc, SFDR = 99 dBc (non 23) Figure 44. FFT for 100-MHz Input Signal Figure 45. FFT for 150-MHz Input Signal 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) 25 D043 -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 25 50 75 Input Frequency (MHz) 100 125 0 D045 fIN = 185 MHz, AIN = – 1 dBFS, SNR = 73.2 dBFS, SFDR = 98 dBc, SFDR = 98 dBc (non 23) 25 50 75 Input Frequency (MHz) 100 125 D045 fIN = 230 MHz, AIN = –1 dBFS, SNR = 72.4 dBFS, SFDR = 91 dBc, SFDR = 98 dBc (non 23) Figure 46. FFT for 185-MHz Input Signal Figure 47. FFT for 230-MHz Input Signal Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 19 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 6.11 Typical Characteristics: Mode 0 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) low-pass decimation-by-2 filter selected, complex FFT plotted, mixer frequency 125 MHz; typical values are at TA = 25°C, full temperature range is from TMIN = –40°C to TMAX = 85°C, ADC sampling frequency = 500 MSPS, 14-bit resolution, no decimation filter, 50% clock duty cycle, AVDD3V = 3 V, AVDD = DVDD = 1.9 V, IOVDD = 1.15 V, –1-dBFS differential input for IF ≤ 250 MHz, and –3-dBFS differential input for IF > 250 MHz (unless otherwise noted) -40 -60 -80 -60 -80 -100 -100 -120 -125 -40 -75 -25 25 Input Frequency (MHz) 75 -120 -125 125 -75 -25 25 Input Frequency (MHz) D047 fIN = 270 MHz, AIN = –3 dBFS, SNR = 69.5 dBFS, SFDR = 83 dBc, SFDR = 87 dBc (non 23) 75 125 D048 fIN = 370 MHz, AIN = –3 dBFS, SNR = 68.1 dBFS, SFDR = 82 dBc, SFDR = 82 dBc (non 23) Figure 48. FFT for 270-MHz Input Signal Figure 49. FFT for 370-MHz Input Signal 0 Amplitude (dBFS) -20 -40 -60 -80 -100 -120 -125 -75 -25 25 Input Frequency (MHz) 75 125 D049 fIN = 470 MHz, AIN = –3 dBFS, SNR = 66.3 dBFS, SFDR = 75 dBc, SFDR = 75 dBc (non 23) Figure 50. FFT for 470-MHz Input Signal 20 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7 Detailed Description 7.1 Overview The ADS54J66 is a low-power, wide-bandwidth, 14-bit, 500-MSPS, quad-channel, telecom receiver device. The ADS54J66 supports the JESD204B serial interface with data rates up to 10 Gbps supporting one lane per channel. The buffered analog input provides uniform input impedance across a wide frequency range and minimizes sample-and-hold glitch energy. The ADS54J66 provides excellent spurious-free dynamic range (SFDR) over a large input frequency range with very low power consumption. The device digital block includes a 2x and 4x decimation low-pass filter with fS / 4 and k × fS / 16 mixers to support a receive bandwidth up to 200 MHz for use as a Digital Pre-Distortion (DPD) observation receiver. The JESD204B interface reduces the number of interface lines allowing high system integration density. An internal phase locked loop (PLL) multiplies the incoming ADC sampling clock to derive the bit clock which is used to serialize the 14-bit data from each channel. 7.2 Functional Block Diagram INAP, INAM 2x Digital Block Interleaving Correction 14-Bit ADC 4x INBP, INBM JESD204B 2x Digital Block Interleaving Correction 14-Bit ADC DAP, DAM FS / 4 K x FS / 16 DBP, DBM FS / 8 SYSREFP, SYSREFM CLKINP, CLKINM PLL x10/x20 SYNCbAB SYNCbCD INCP, INCM Digital Block Interleaving Correction 14-Bit ADC DCP, DCM 2x FS / 4 INDP, INDM 4x Digital Block Interleaving Correction 14-Bit ADC JESD204B K x FS / 16 DDP, DDM 2x FS / 8 SDOUT SEN SDIN SCLK RESET SCAN_EN Configuration Registers Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 21 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.3 Feature Description 7.3.1 Analog Inputs The ADS54J66 analog signal inputs are designed to be driven differentially. The analog input pins have internal analog buffers that drive the sampling circuit. As a result of the analog buffer, the input pins present a high impedance input across a very wide frequency range to the external driving source which enables great flexibility in the external analog filter design as well as excellent 50-Ω matching for RF applications. The buffer also helps isolate the external driving circuit from the internal switching currents of the sampling circuit, thus resulting in a more constant SFDR performance across input frequencies. The common-mode voltage of the signal inputs is internally biased to 1.9 V using 600-Ω resistors which allows for ac coupling of the input drive network. Each input pin (INP, INM) must swing symmetrically between (VCM + 0.475 V) and (VCM – 0.475 V), resulting in a 1.9-VPP (default) differential input swing. The input sampling circuit has a 3-dB bandwidth that extends up to 900 MHz. 7.3.2 Recommended Input Circuitry In order to achieve optimum ac performance the circuitry shown in Figure 51 is recommended at the analog inputs. T1 T2 0.1 PF 10 : INxP 0.1 PF 0.1 PF 25 : 25 : RIN 3.3 pF CIN 25 : 25 : INxM 1:1 1:1 0.1 PF 10 : Device Figure 51. Analog Input Driving Circuit 22 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.4 Device Functional Modes 7.4.1 Digital Features The ADS54J66 supports decimation-by-2 and -4 and un-decimated output. The four channels can be configured as pairs (A, B and C, D; however, the same decimation factor must be chosen for all four channels). Figure 52 shows signal processing done in the digital down-conversion (DDC) block of the ADS54J66. Table 1 shows available modes of operation for this block. I Data Filter N IL Engine Real Data Channel x 0 2 4 5 6 7 8 cos (2Snfmix2 / fS ) cos (2Snfmix1 / fS ) 500-MSPS Data, x(n) 2 sin (2Snfmix1 / fS ) Upscaled Zero-Padded Data sin (2Snfmix2 / fS ) To JESD Encoder N Filter Q Data Default 14-Bit Mode Default 14-Bit Data Mode Selection Figure 52. Digital Down-Conversion Block Diagram Table 1. Overview of Operating Modes OPERATING MODE BANDWIDTH DIGITAL MIXER DECIMATION 0 ±fS / 4 2 – 4 MAX OUTPUT RATE 491 MSPS 368 MSPS OUTPUT FORMAT 2 200 MHz 150 MHz Complex 250 MSPS 2 100 MHz 75 MHz Real 250 MSPS N × fS / 16 2 100 MHz 75 MHz Real 250 MSPS N × fS / 16 2 200 MHz 150 MHz Complex 250 MSPS 6 N × fS / 16 4 100 MHz 75 MHz Complex 125 MSPS 7 N × fS / 16 2 100 MHz 75 MHz Real 500 MSPS – – 245.76 MHz 184.32 MHz Real 500 MSPS 5 8 DESCRIPTION Decimation No decimation Table 2 shows characteristics of different blocks of DDC signal processing blocks active in different modes. Table 2. Features of DDC Block in Different Modes MODE fmix1 FILTER AND DECIMATION fmix2 OUTPUT 0 fS / 4 LPF cutoff at fS / 4, decimation-by-2 Not used I, Q data at 250 MSPS each are given out 2 Not used LPF or HPF cutoff at fS / 4, decimation-by-2 Not used Straight 250 MSPS data are given out 4 k fS / 16 LPF cutoff at fS / 8, decimation-by-2 fS / 8 Real data at 250 MSPS are given out 5 k fS / 16 LPF cutoff at fS / 8, decimation-by-2 Not used I, Q data at 250 MSPS each are given out 6 k fS / 16 LPF cutoff at fS / 8, decimation-by-4 Not used I, Q data at 125 MSPS each are given out 7 k fS / 16 LPF cutoff at fS8, decimation-by-2 fS / 8 Real data are up-scaled, zero-padded and given out at 500 MSPS Default Not used Not used Not used Straight 500-MSPS, 14-bit data are given out Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 23 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.4.2 Mode 0, Decimation-by-2 with IQ Outputs for up to 220 MHz of IQ Bandwidth In this configuration, the DDC block includes a fixed frequency ±fS / 4 complex digital mixer preceding the digital filter, so the IQ passband is approximately ±110 MHz (3 dB) centered at fS / 4. Mixing with +fS / 4 inverts the spectrum. The stop-band attenuation is approximately 90 dB and the pass-band flatness is ±0.1 dB. Figure 53 shows mixing operation in DDC mode 0. Table 3 shows corner frequencies of decimation filter in DDC mode 0. Figure 54 and Figure 55 show frequency response of the filter. ±fS / 4 IQ: 500 MSPS 500 MSPS 14-Bit ADC IQ: 250 MSPS 2x fS / 4 fS / 2 fS / 4 Figure 53. Mixing in Mode 0 CORNERS LOW PASS –0.1 dB 0.204 × fS –0.5 dB 0.211 × fS –1 dB 0.216 × fS –3 dB 0.226 × fS 20 0.5 0 0 -20 -0.5 Magnitude (dB) Magnitude (dB) Table 3. Filter Specification Details, Mode 0 -40 -60 -1.5 -80 -2 -100 -2.5 -120 -3 0 0.1 0.2 0.3 Frequency Response 0.4 0.5 0 0.05 D052 Figure 54. Frequency Response of Filter in Mode 0 24 -1 0.1 0.15 Frequency Response 0.2 0.25 D053 Figure 55. Zoomed View of Frequency Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.4.3 Mode 2, Decimation-by-2 for up to 110 MHz of Real Bandwidth In this configuration, the DDC block only includes a 2x decimation filter (high pass or low pass) with real outputs. The pass band is approximately 110 MHz (3 dB). Figure 56 shows the filtering operation in DDC mode 2. Table 4 shows corner frequencies of decimation filter in DDC mode 2. Figure 57 and Figure 58 show frequency response of the filter. 500 MSPS 14-Bit ADC 250 MSPS 2x fS / 4 fS / 2 fS / 4 Figure 56. Filtering in Mode 2 CORNERS LOW PASS HIGH PASS –0.1 dB 0.204 × fS 0.296 × fS –0.5 dB 0.211 × fS 0.290 × fS –1 dB 0.216 × fS 0.284 × fS –3 dB 0.226 × fS 0.274 × fS 20 0.5 0 0 -20 -0.5 Magnitude (dB) Magnitude (dB) Table 4. Filter Specification Details, Mode 2 -40 -60 -1 -1.5 -80 -2 -100 -2.5 -120 -3 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 Frequency Response 0.4 0.45 0.5 0 0.05 D056 Figure 57. Frequency Response for Decimate-by-2 Low-Pass and High-Pass Filter (in Mode 2) 0.1 0.15 Frequency Response 0.2 0.25 D057 Figure 58. Zoomed View of Frequency Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 25 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.4.4 Modes 4 and 7, Decimation-by-2 with Real Outputs for up to 110 MHz of Bandwidth In this configuration, the DDC block includes a selectable N × fS / 16 complex digital mixer (N from –8 to +7) preceding the decimation-by-2 digital filter also with an IQ passband of approximately ±55 MHz (3 dB) centered at N × fS / 16. A positive value for N inverts the spectrum. In addition, a fS / 8 complex digital mixer is added after the decimation filter transforming the output back to real format and centers the output spectrum within the Nyquist zone. In addition, the ADS54J66 supports a 0-pad feature where a sample with value = 0 is added after each sample. In this way the output data rate is interpolated to 500 MSPS (real) with a second image inverted at fS / 2 – fIN. The stop-band attenuation is approximately 90 dB for in-band aliases from negative frequencies and approximately 55 dB for out-of-band aliases. The passband flatness is ±0.1 dB. Figure 59 shows the filtering operation in DDC mode 4 and 7. Table 5 shows corner frequencies of decimation filter in DDC mode 4 and 7. Figure 60 and Figure 61 show frequency response of the filter. 2nd Image fS / 8 N x fS / 16 500 MSPS 14-Bit ADC fS / 8 0 Pad IQ: 500 MSPS IQ: 250 MSPS Real: 500 MSPS Real: 250 MSPS 2x fS / 4 fS / 2 Example : N= -4 fS / 8 fS / 4 fS / 2 0 fS / 8 fS / 4 fS / 4 Figure 59. Mixing and Filtering in Modes 4 and 7 CORNERS LOW PASS –0.1 dB 0.102 × fS –0.5 dB 0.105 × fS –1 dB 0.108 × fS –3 dB 0.113 × fS 20 0.5 0 0 -20 -0.5 Magnitude (dB) Magnitude (dB) Table 5. Filter Specification Details, Modes 4 and 7 -40 -60 -1.5 -80 -2 -100 -2.5 -3 -120 0 0.05 0.1 0.15 Frequency Response 0.2 0.25 0 0.05 D050 Figure 60. Frequency Response for Decimate-by-2, Low-Pass Filter (in Modes 4 and 7) 26 -1 0.1 0.15 Frequency Response 0.2 0.25 D051 Figure 61. Zoomed View of Frequency Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.4.5 Mode 5, Decimation-by-2 with IQ Outputs for up to 110 MHz of IQ Bandwidth In this configuration, the DDC block includes a selectable N × fS / 16 complex digital mixer (N from –8 to +7) preceding the decimation-by-2 digital filter, so the IQ passband is approximately ±55 MHz (3 dB) centered at N × fS / 16. A positive value for N inverts the spectrum. The stop-band attenuation is approximately 90 dB for in-band aliases from negative frequencies. The pass-band flatness is ±0.1 dB. Figure 62 shows the filtering operation in DDC mode 5. Table 6 shows corner frequencies of decimation filter in DDC mode 5. Figure 63 and Figure 64 show frequency response of the filter. Figure 62 shows the filtering operation in DDC mode 5. Table 6 shows corner frequencies of decimation filter in DDC mode 5. Figure 63 and Figure 64 show frequency response of the filter. N x fS / 16 IQ: 250 MSPS IQ: 500 MSPS 500 MSPS 14-Bit ADC 2x Example: N = -4 fS / 4 fS / 2 fS / 8 fS / 4 Figure 62. Mixing and Filtering in Mode 5 CORNERS LOW PASS –0.1 dB 0.102 × fS –0.5 dB 0.105 × fS –1 dB 0.108 × fS –3 dB 0.113 × fS 20 0.5 0 0 -20 -0.5 Magnitude (dB) Magnitude (dB) Table 6. Filter Specification Details, Mode 5 -40 -60 -1 -1.5 -80 -2 -100 -2.5 -3 -120 0 0.05 0.1 0.15 Frequency Response 0.2 0.25 0 0.05 D050 Figure 63. Frequency Response for Decimate-by-2, Low-Pass Filter (In Mode 5) 0.1 0.15 Frequency Response 0.2 0.25 D051 Figure 64. Zoomed View of Frequency Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 27 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.4.6 Mode 6, Decimation-by-4 with IQ Outputs for up to 110 MHz of IQ Bandwidth In this configuration, the DDC block includes a selectable N × fS / 16 complex digital mixer (n from –8 to +7) preceding the decimation-by-4 digital filter, so the IQ passband is approximately ±55 MHz (3 dB) centered at N × fS / 16. A positive value for N inverts the spectrum. Figure 65 shows the filtering operation in DDC mode 6. Table 7 shows corner frequencies of decimation filter in DDC mode 6. The decimation-by-4 filter is a cascade of two decimation-by-2 filters with frequency response shown in Figure 66 and Figure 67. The stop-band attenuation is approximately 90 dB for in-band aliases from negative frequencies and approximately 55 dB for out-of-band aliases. The pass-band flatness is ±0.1 dB. N x fS / 16 IQ: 250 MSPS IQ: 500 MSPS 500 MSPS 14-Bit ADC 2x IQ: 125 MSPS 2x Example: N= 6 3 fS / 8 fS / 4 fS / 2 fS / 8 fS / 4 Figure 65. Mixing and Filtering in Mode 6 CORNERS LOW PASS –0.1 dB 0.102 × fS –0.5 dB 0.105 × fS –1 dB 0.108 × fS –3 dB 0.113 × fS 20 0.5 0 0 -20 -0.5 Magnitude (dB) Magnitude (dB) Table 7. Filter Specification Details, Mode 6 -40 -60 -1.5 -80 -2 -100 -2.5 -3 -120 0 0.05 0.1 0.15 Frequency Response 0.2 0.25 0 0.05 D050 Figure 66. Frequency Response for Decimate-by-2, Low-Pass Filter (in Mode 6) 28 -1 0.1 0.15 Frequency Response 0.2 0.25 D051 Figure 67. Zoomed View of Frequency Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.4.7 Overrange Indication The ADS54J66 provides a fast overrange indication (FOVR) that can be presented in the digital output data stream via SPI configuration. When the FOVR indication is embedded in the output data stream, it replaces the LSB (normal 0) of the 16 bit going to the 8b/10b encoder as shown in Figure 68. One threshold is set per channel pair A, B and C, D. 14-Bit Data Output D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 0 0, OVR 16-Bit Data Going Into 8b/10b Encoder Figure 68. Timing Diagram for FOVR The fast OVR is triggered if the input voltage exceeds the programmable overrange threshold and it gets presented after just 44 input clock cycles enabling a quicker reaction to an overrange event. The input voltage level at which the overload is detected is referred to as the threshold. It is programmable using the FOVR THRESHOLD bits. The input voltage level that fast OVR is triggered is: Full-scale × [the decimal value of the FOVR threshold bits] / 255) The default threshold is E3h (227), corresponding to a threshold of –1 dBFS. In terms of full-scale input, the fast OVR threshold can be calculated as shown in Equation 1: 20 × log (<FOVR Threshold> / 255). (1) Table 8 is an example register write to set the FOVR threshold for all four channels. Table 8. Register Sequence for FOVR Configuration ADDRESS DATA COMMENT 11h 80h Go to master page 59h 20h Set the ALWAYS WRITE 1 bit. This bit configures the OVR signal as fast OVR. 11h FFh Go to ADC page 5Fh FFh Set FOVR threshold for all channels to 255 4004h 68h 4003h 00h 60ABh 01h 70ABh 01h 60ADh 03h 70ADh 03h 6000h 01h 7000h 01h 6000h 00h 7000h 00h Go to main digital page of the JESD bank Enable bit D0 overwrite Select FOVR to replace bit D0 Pulse the IL RESET register bit. Register writes in main digital page take effect when the IL RESET register bit is pulsed. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 29 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.4.8 Power-Down Mode The ADS54J66 provides a highly-configurable power-down mode. Power-down can be enabled using the PDN pin or SPI register writes. A power-down mask can be configured that allows a trade-off between wake-up time and power consumption in power-down mode. Two independent power-down masks can be configured: MASK 1 and MASK 2, as shown in Table 9. See the master page registers in Table 15 for further details. Table 9. Register Address for Power-Down Modes REGISTER ADDRESS A[7:0] (Hex) REGISTER DATA COMMENT 7 6 5 4 3 2 0 0 1 0 MASTER PAGE (80h) 20 MASK 1 21 23 MASK 2 24 PDN ADC CHAB PDN BUFFER CHCD PDN ADC CHAB PDN BUFFER CHCD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PDN MASK 0 0 0 0 OVERRIDE PDN PIN PDN MASK SEL 53 0 MASK SYSREF 55 0 0 CONFIG 0 PDN ADC CHCD PDN BUFFER CHAB GLOBAL PDN 26 PDN ADC CHCD PDN BUFFER CHAB To save power, the device can be put in complete power down by using the GLOBAL PDN register bit. However, when JESD link must remain up when putting the device in power down, the ADC and analog buffer can be powered down by using the PDN ADC CHx and PDN BUFFER CHx register bits after enabling the PDN MASK register bit. The PDN MASK SEL register bit can be used to select between MASK 1 or MASK 2. Table 10 shows power consumption for different combinations of the GLOBAL PDN, PDN ADC CHx, and PDN BUFF CHx register bits. Table 10. Power Consumption in Different Power-Down Settings REGISTER BIT COMMENT IAVDD3V (mA) IAVDD (mA) IDVDD (mA) IIOVDD (mA) TOTAL POWER (W) Default After reset, with a full-scale input signal to both channels 0.340 0.365 0.184 0.533 2.675 GBL PDN = 1 The device is in complete power-down state 0.002 0.006 0.012 0.181 0.247 GBL PDN = 0, PDN ADC CHx = 1 (x = AB or CD) The ADCs of one pair of channels are powered down 0.277 0.225 0.123 0.496 2.063 GBL PDN = 0, PDN BUFF CHx = 1 (x = AB or CD) The input buffers of one pair of channels are powered down 0.266 0.361 0.187 0.527 2.445 GBL PDN = 0, PDN ADC CHx = 1, PDN BUFF CHx = 1 (x = AB or CD) The ADCs and input buffers of one pair of channels are powered down 0.200 0.224 0.126 0.492 1.830 GBL PDN = 0, PDN ADC CHx = 1, PDN BUFF CHx = 1 (x = AB and CD) The ADCs and input buffers of all channels are powered down 0.060 0.080 0.060 0.448 0.960 30 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.5 Programming 7.5.1 Device Configuration The ADS54J66 can be configured using a serial programming interface, as described in this section. In addition, the device has one dedicated parallel pin (PDN) for controlling the power-down modes. The ADS54J66 supports a 24-bit (16-bit address, 8-bit data) SPI operation and uses paging (see the Detailed Register Information section) to access all register bits. Figure 69 shows timing diagram for serial interface signals. SPI registers are grouped in two banks with each bank containing different pages (see Figure 84). First 4 MSBs of 16-bit address are special bits carrying information about register bank, page and channel to be programmed. Table 11 lists the purpose of each special bit. Register Address[11:0] SDIN R/W M P CH A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 tDH tSCLK tDSU SCLK tSLOADS tSLOADH SEN RESET Figure 69. Serial Interface Timing Diagram Table 11. Programing Details of Serial Interface SPI BITS DESCRIPTION OPTIONS Read/write bit 0 = SPI write 1 = SPI read back M SPI bank access 0 = Analog SPI bank (master and ADC page) 1 = Digital SPI bank (main digital, analog JESD, and digital JESD pages) P JESD page selection bit 0 = Page access 1 = Register access SPI access for a specific channel of the digital SPI bank 0 = Channel AB 1 = Channel CD By default, both channels are being addressed. SPI address bits — SPI data bits — R/W CH ADDR [11:0] DATA [7:0] Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 31 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.5.1.1 Details of the Serial Interface The ADC has a set of internal registers that can be accessed by the serial interface formed by the SEN (serial interface enable), SCLK (serial interface clock) and SDIN (serial interface data) pins. Serially shifting bits into the device is enabled when SEN is low. Serial data on SDIN are latched at every SCLK rising edge when SEN is active (low). The interface can function with SCLK frequencies from 5 MHz down to very low speeds (of a few hertz) and also with a non-50% SCLK duty cycle. Figure 74 shows timing requirements for serial interface signals. Table 12. Serial Interface Timing Requirements (1) MIN MAX UNIT > dc 20 MHz fSCLK SCLK frequency (equal to 1 / tSCLK) tSLOADS SEN to SCLK setup time 25 ns tSLOADH SCLK to SEN hold time 25 ns tDSU SDATA setup time 25 ns tDH SDATA hold time 25 ns (1) Typical values are at 25°C. Minimum and maximum values are across the full temperature range of TMIN = –40°C to TMAX = 100°C, AVDD3V = 3 V, AVDD = 1.9 V, and DRVDD = 1.8 V, unless otherwise noted. 7.5.1.2 Serial Register Write: Analog Bank The analog SPI bank contains of two pages (the master and ADC page). The internal register of the ADS54J66 analog SPI bank can be programmed by: 1. Drive the SEN pin low. 2. Initiate a serial interface cycle specifying the page address of the register whose content must be written. – Master page: write address 0011h with 80h. – ADC page: write address 0011h with 0Fh. 3. Write the register content as shown in Figure 70. When a page is selected, multiple writes into the same page can be done. SDIN 0 0 0 0 R/W M P CH Register Address[11:0] A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 SCLK SEN RESET Figure 70. Serial Register Write Timing Diagram 32 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.5.1.3 Serial Register Readout: Analog Bank The content from one of the two analog banks can be read out by: 1. Drive the SEN pin low. 2. Select the page address of the register whose content must be read. – Master page: write address 0011h with 80h. – ADC page: write address 0011h with 0Fh. 3. Set the R/W bit to 1 and write the address to be read back. 4. Read back the register content on the SDOUT pin, as shown in Figure 71. When a page is selected, multiple read backs from the same page can be done. SDIN 1 0 0 0 R/W M P CH Register Address[11:0] A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] = XX A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 SCLK SEN RESET SDOUT SDOUT[7:0] Figure 71. Serial Register Read Timing Diagram 7.5.1.4 JESD Bank SPI Page Selection The JESD SPI bank contains five pages (main digital, interleaving engine, decimation filter, JESD digital, and JESD analog). The individual pages can be selected following these steps: 1. Drive the SEN pin low. 2. Set the M bit to 1 and specify the page with two register writes (Note: the P bit is set to 0) – Write address 4003h with 00h (LSB byte of the page address) – Write address 4004h MSB byte of the page address spacer – Main digital page: write address = 4004h with 68h (default) – Digital JESD page: write address = 4004h with 69h – Analog JESD page: write address = 4004h with 6Ah – Interleaving engine page: write address = 4004h with 61h – Decimation filter page: write address = 4004h with 61h and 4003h with 41h Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 33 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Figure 72 shows the serial interface signals when pages in the JESD bank are being accessed. Note that the P bit is set to 0. SDIN 0 1 0 0 R/W M P CH Register Address[11:0] A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 SCLK SEN RESET Figure 72. SPI Timing Diagram for Accessing a Page in the JESD Bank 7.5.1.5 Serial Register Write: Digital Bank The ADS54J66 is a quad-channel device and the JESD204B portion is configured individually for two channels (A, B and C, D) using the CH bit. Note that the P bit must be set to 1 for register writes. 1. Drive the SEN pin low. 2. Select the JESD bank page (Note: M bit = 1, P bit = 0) – Write address 4003h with 00h – Main digital page: write address = 4004h with 68h (default) – Digital JESD page: write address = 4004h with 69h – Analog JESD page: write address = 4004h with 6Ah – Interleaving Engine page: write address = 4004h with 61h – Decimation Filter page: write address = 4004h with 61h and 4003h with 41h 3. Set the M and P bit to 1 and select channels A, B (CH = 0) or C, D (CH = 1) and write the register content. When a page is selected, multiple writes into the same page can be done. By default, register writes are applied to both channel pairs (broadcast mode). To disable broadcast mode and enable individual channel writes, write address 4005h with 01h (default is 00h). Figure 73 shows the serial interface signals when a register in the desired page of the JESD bank is programmed (note that the P bit must be set to 1 in this step). SDIN 0 1 1 0 R/W M P CH Register Address[11:0] A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 SCLK SEN RESET Figure 73. SPI Timing Diagram for Writing a Register in the JESD Bank (After Page is Accessed) 7.5.1.6 Individual Channel Programming By default, register writes are applied to both channels in a group (for example, the register writes are applied to channels A and B if the CH bit is 0, or the register writes are applied to channels C and D if the CH bit is 1). This form of programming is referred to as broadcast mode. For pages located in the JESD bank, the device gives flexibility to program each channel individually. To enable individual channel writes, write address 4005h with 01h (default is 00h). 34 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.5.1.7 Serial Register Readout: JESD Bank SPI read out of content in one of the three digital banks can be accomplished with the following steps: 1. Drive the SEN pin low. 2. Select the digital bank page (Note: M bit = 1, P bit = 0) – Write address 4003h with 00h – Main digital page: write address = 4004h with 68h – Digital JESD page: write address = 4004h with 69h – Analog JESD page: write address = 4004h with 6Ah – Interleaving engine page: write address = 4004h with 61h – Decimation filter page: write address = 4004h with 61h and 4003h with 41h 3. Set the R/W bit, M and P bit to 1 and select channels A, B or C, D and write the address to be read back. 4. Read back register content on the SDOUT pin. When a page is selected, multiple read backs from the same page can be done. Figure 74 shows the serial interface signals when the contents of a register in the desired page of the JESD bank are being read-back (note that the P bit must be set to 1 in this step). SDIN 1 1 1 0 R/W M P CH Register Address[11:0] A11 A10 A9 A8 A7 A6 A5 A4 Register Data[7:0] = XX A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 SCLK SEN RESET SDOUT SDOUT[7:0] Figure 74. Serial Register Read Timing Diagram Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 35 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.5.2 JESD204B Interface The ADS54J66 supports device subclass 1 with a maximum output data rate of 10 Gbps for each serial transmitter. Figure 75 shows JESD20B block inside ADS54J66. An external SYSREF signal is used to align all internal clock phases and the local multi frame clock to a specific sampling clock edge. This process allows synchronization of multiple devices in a system and minimizes timing and alignment uncertainty. The ADS54J66 supports single (for all four JESD links) or dual (for channel A, B and C, D) SYNCb inputs and can be configured via SPI as shown in Figure 76. JESD204B Block Transport Layer Link Layer Frame Data Mapping 8b/10b Encoding Scrambler 1+x14+x15 DX Comma Characters Initial Lane Alignment Test Patterns SYNCb Figure 75. JESD Interface Block Diagram SYSREF SYNCbAB INA JESD 204B JESD204B DA INB JESD 204B JESD204B DB INC JESD 204B JESD204B DC IND JESD 204B JESD204B DD Sample Clock SYNCbCD Figure 76. JESD204B Transmitter Block Depending on the ADC sampling rate, the JESD204B output interface can be operated with one lane per channel. The JESD204B setup and configuration of the frame assembly parameters is handled via SPI interface. The JESD204B transmitter block consists of the transport layer, the data scrambler and the link layer. The transport layer maps the ADC output data into the selected JESD204B frame data format and manages if the ADC output data or test patterns are being transmitted. The link layer performs the 8b/10b data encoding as well as the synchronization and initial lane alignment using the SYNC input signal. Optionally data from the transport layer can be scrambled. 36 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.5.2.1 JESD204B Initial Lane Alignment (ILA) The initial lane alignment process is started by the receiving device by de-asserting the SYNCb signal. Upon detecting a logic low on the SYNC input pins, the ADS54J66 starts transmitting comma (K28.5) characters to establish code group synchronization as shown in Figure 77. When synchronization is completed the receiving device re-asserts the SYNCb signal and the ADS54J66 starts the initial lane alignment sequence with the next local multi frame clock boundary. The ADS54J66 transmits four multi-frames each containing K frames (K is SPI programmable). Each of the multi-frames contains the frame start and end symbols and the second multi-frame also contains the JESD204 link configuration data. SYSREF LMFC Clock LMFC Boundary Multi Frame SYNCb Transmit Data xxx K28.5 Code Group Synchronization K28.5 ILA Initial Lane Alignment ILA DATA DATA Data Transmission Figure 77. ILA Sequence Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 37 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.5.2.2 JESD204B Frame Assembly The JESD204B standard defines the following parameters: • L is the number of lanes per link. • M is the number of converters per device. • F is the number of octets per frame clock period. • S is the number of samples per frame. Table 13 lists the available JESD204B formats and valid ranges for the ADS54J66. The ranges are limited by the Serdes line rate and the maximum ADC sample frequency. Table 13. Available JESD204B Formats and Valid Ranges for the ADS54J66 L M F S OPERATING MODE DIGITAL MODE OUTPUT FORMAT JESD MODE (1) JESD PLL MODE (2) MAX ADC OUTPUT RATE (MSPS) MAX fSERDES (Gbps) 4 8 4 1 0,5 2x decimation Complex 40x 40x 250 10.0 4 4 2 1 2,4 2x decimation Real 20x 20x 250 5.0 2 4 4 1 2,4 2x decimation Real 40x 40x 250 10.0 4 8 4 1 6 4x decimation Complex 40x 20x 125 5.0 2 8 8 1 6 4x decimation Complex 80x 40x 125 10.0 4 4 2 1 7 2x decimation with 0-pad Real 20x 40x 500 10.0 4 4 2 1 8 No decimation Real 20x 40x 500 10.0 (1) (2) In register 01h of the JESD digital page. In register 16h of the JESD analog page. The detailed frame assembly is shown in Table 14. Table 14. Detailed Frame Assembly LMFS = 4841 DA LMFS = 4421 AI0[15:8] AI0[7:0] AQ0[15:8] AQ0[7:0] A0[15:8] A0[7:0] A1[15:8] A1[7:0] A0[15:8] A0[7:0] 0000 0000 0000 0000 BI0[15:8] BI0[7:0] BQ0[15:8] BQ0[7:0] B0[15:8] B0[7:0] B1[15:8] B1[7:0] B0[15:8] B0[7:0] 0000 0000 0000 0000 CI0[15:8] CI0[7:0] CQ0[15:8] CQ0[7:0] C0[15:8] C0[7:0] C1[15:8] C1[7:0] C0[15:8] C0[7:0] 0000 0000 0000 0000 DI0[15:8] DI0[7:0] DQ0[15:8] DQ0[7:0] D0[15:8] D0[7:0] D1[15:8] D1[7:0] D0[15:8] D0[7:0] 0000 0000 0000 0000 DB A0[15:8] A0[7:0] B0[15:8] B0[7:0] AI0[15:8] AI0[7:0] AQ0[15:8] AQ0[7:0] BI0[15:8] BI0[7:0] BQ0[15:8] BQ0[7:0] DC C0[15:8] C0[7:0] D0[15:8] D0[7:0] CI0[15:8] CI0[7:0] CQ0[15:8] CQ0[7:0] DI0[15:8] DI0[7:0] DQ0[15:8] DQ0[7:0] DB DC DD LMFS = 2441 38 LMFS = 4421 (0-Pad) LMFS = 2881 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.5.2.3 JESD Output Switch The ADS54J66 provides a digital cross point switch in the JESD204B block which allows internal routing of any output of the two ADCs within one channel pair to any of the two JESD204B serial transmitters in order to ease layout constraints. The cross-point switch routing is configured via SPI (address 21h in the JESD digital page, as shown in Figure 78). JESD Switch ADCA DAP, DAM ADCB DBP, DBM JESD Switch ADCC DCP, DCM ADCD DDP, DDM Figure 78. Switching the Output Lanes 7.5.2.3.1 SERDES Transmitter Interface Each of the 10 Gbps serdes transmitter outputs requires ac coupling between transmitter and receiver. The differential pair must be terminated with 100 Ω as close to the receiving device as possible to avoid unwanted reflections and signal degradation as shown in Figure 79. 0.1 PF DAP, DAB, DAC, DAP Rt = ZO Transmission Line, Zo VCM Receiver Rt = ZO DAM, DAB, DAC, DAM 0.1 PF Figure 79. SERDES Transmitter Connection to Receiver 7.5.2.3.2 SYNCb Interface The ADS54J66 supports single (either SYNCb input controls all four JESD204B links) or dual (one SYNCb input controls two JESD204B lanes (DA, DB and DC, DD) SYNCb control. When using single SYNCb control, connect the unused input to differential logic low (SYNCbxxP = 0 V, SYNCbxxM = IOVDD). Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 39 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.5.2.3.3 Eye Diagram Figure 80 to Figure 83 show the serial output eye diagrams of the ADS54J66 at 5 Gbps and 10 Gbps with default and increased output voltage swing against the JESD204B mask. 40 Figure 80. Eye at 5-Gbps Bit Rate with Default Output Swing Figure 81. Eye at 5-Gbps Bit Rate with Increased Output Swing Figure 82. Eye at 10-Gbps Bit Rate with Default Output Swing Figure 83. Eye at 10-Gbps Bit Rate with Increased Output Swing Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6 Register Maps The conceptual diagram of the serial registers is shown in Figure 84. SPI Cycle Initiated M, P, CH Bits Decoder M=0 M=1 Analog Page Selection JESD Bank Page Address Value 6800h Addr 20h Addr 74h Master Page [PDN, OVR, DC Coupling] Addr 59h Addr 18h Addr 0h Main Digital Page [Nyquist Zone, OVR Select] ADC Page [Test Patterns, Fast OVR] Addr 78h Addr F7h Value 6100h Decimation Filter Page [Signal Processing Modes 0 to 8] Addr 02h Value 6900h Addr 0h Addr 00h IL Engine Page [Engine Bypass, DC Correction] Addr 68h Value 6141h Addr 12h JESD Analog Page [PLL Config, Output Swing, Pre-Emphasis] JESD Digital Page [JESD Config] Addr 22h Value 6A00h Addr 1Bh Figure 84. Serial Interface Registers Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 41 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Register Maps (continued) 7.6.1 Detailed Register Information The ADS54J66 contains two main SPI banks. The analog SPI bank gives access to the ADC cores and the digital SPI bank controls the serial interface. The analog SPI bank is divided into two pages (master and ADC) and the digital SPI bank is divided into five pages (main digital, interleaving engine, decimation filter, JESD digital, and JESD analog; see Figure 84). Table 15 gives a summary of all programmable registers in the pages of different banks in the ADS54J66. Table 15. Register Map REGISTER ADDRESS A[7:0] (Hex) REGISTER DATA 7 6 5 4 3 2 1 0 RESET 0 0 0 0 0 0 RESET 0 0 DIS BROADCAST 0 0 GENERAL REGISTERS 0 3 JESD BANK PAGE SEL [7:0] 4 5 JESD BANK PAGE SEL [15:8] 0 0 0 0 11 0 ANALOG PAGE SELECTION [7:0] MASTER PAGE (80h) 20 PDN ADC CHAB 21 PDN ADC CHCD PDN BUFFER CHCD PDN BUFFER CHAB 23 0 0 PDN ADC CHAB 24 PDN ADC CHCD 0 0 0 0 26 GLOBAL PDN PDN BUFFER CHCD OVERRIDE PDN PIN PDN MASK SEL 0 0 0 0 0 3A 0 BUFFER CURR INCREASE 0 0 0 0 0 0 39 PDN BUFFER CHAB 0 0 0 0 0 0 53 CLK DIV ALWAYS WRITE 1 MASK SYSREF 0 0 0 0 0 0 55 0 0 0 PDN MASK 0 0 0 0 56 0 0 0 0 INPUT BUFF CURR EN 0 0 0 59 0 0 ALWAYS WRITE 1 0 0 0 0 0 60 PULSE BIT CHC 0 0 0 0 0 0 0 61 0 0 0 0 HD3 NYQ2 CHCD 0 0 PULSE BIT CHD 6C PULSE BIT CHA 0 0 0 0 0 0 0 6D 0 0 0 0 HD3 NYQ2 CHAB 0 0 PULSE BIT CHB 0 0 0 0 0 0 0 0 ADC PAGE (0Fh) 5F FOVR THRESH 74 TEST PATTERN ON CHANNEL 75 76 CUSTOM PATTERN 1 [13:6] CUSTOM PATTERN 1 [5:0] 77 78 42 CUSTOM PATTERN 2 [13:6] CUSTOM PATTERN 2 [5:0] Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 Register Maps (continued) Table 15. Register Map (continued) REGISTER DATA REGISTER ADDRESS A[7:0] (Hex) 7 6 5 4 3 2 0 1 0 INTERLEAVING ENGINE PAGE (6100h) 18 0 0 0 0 0 68 0 0 0 0 0 1 0 0 0 0 DDC MODE6 EN1 2 0 0 CHA/D HPF EN CHA/D COARSE MIX IL BYPASS DC CORR DIS 0 DECIMATION FILTER PAGE (6141h) 0 CHB/C FINE MIX DDC MODE ALWAYS WRITE 1 CHB/C HPF EN CHB/C COARSE MIX CHA/D FINE MIX MAIN DIGITAL PAGE (6800h) 0 0 0 0 0 0 42 0 0 0 0 0 0 0 IL RESET NYQUIST ZONE 4E CTRL NYQUIST ZONE 0 0 0 0 0 0 0 AB 0 0 0 0 0 0 0 OVR EN AD 0 0 0 0 F7 0 0 0 0 0 0 0 DIG RESET 0 CTRL K JESD MODE EN DDC MODE6 EN2 TESTMODE EN 0 LANE ALIGN FRAME ALIGN 1 SYNC REG SYNC REG EN SYNCB SEL AB/CD 0 DDC MODE6 EN3 0 LINK LAYER RPAT LMFC MASK RESET 0 OVR ON LSB JESD DIGITAL PAGE (6900h) 2 LINK LAYER TESTMODE 3 FORCE LMFC COUNT 5 SCRAMBLE EN 0 0 6 0 0 0 19 0 0 0 0 RELEASE ILANE SEQ 0 0 0 0 0 FRAMES PER MULTI FRAME (K) 0 LC [27:24] LC [23:16] 1B LC [15:8] 1C LC [7:0] 0 0 0 0 HC [27:24] 1E HC [23:16] 1F HC [15:8] 20 HC [7:0] 21 22 0 LMFC COUNT INIT 1A 1D TX LINK DIS JESD MODE OUPUT CHA MUX SEL 0 OUTPUT CHB MUX SEL 0 0 OUTPUT CHC MUX SEL 0 OUT CHA INV OUTPUT CHD MUX SEL OUT CHB INV OUT CHC INV OUT CHD INV 0 JESD ANALOG PAGE (6A00h) 12 SEL EMP LANE A/D 0 13 SEL EMP LANE B/C 0 16 0 1B 0 JESD SWING 0 0 0 0 0 0 0 0 JESD PLL MODE 0 0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 43 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.2 Example Register Writes Global power down: ADDRESS DATA 11h 80h Set master page COMMENT 00h26 80h Set global power down Change decimation mode 0 to mode 4 adjusting both the LMFS configuration (LMFS = 4841 to 4421) as well as serial output data rate (10 Gbps to 5 Gbps): 44 ADDRESS DATA COMMENT 4004h 69h 4003h 00h 6000h 40h Enables JESD mode overwrite 6001h 01h Select digital to 20x mode 4004h 6Ah Select analog JESD page 6016h 00h Set serdes PLL to 20x mode 4004h 61h 4003h 41h 6000h CCh Select mode 4 Digital mixer for channel AB set to –4 (fS / 4) 6002h 0Ch Digital mixer for channel CD set to –4 (fS / 4) Select digital JESD page Select decimation filter page Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3 Register Descriptions 7.6.3.1 General Registers 7.6.3.1.1 Register 0h (offset = 0h) [reset = 0h] Figure 85. Register 0h 7 RESET R/W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 RESET R/W-0h 2 1 0 2 1 0 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 16. Register 0h Field Description (1) Bit Name Type Reset Description 7 (1) RESET R/W 0h 0 = Normal operation 1 = Internal software reset, clears back to 0 6-0 0 W 0h Must write 0. 0 (1) RESET R/W 0h 0 = Normal operation 1 = Internal software reset, clears back to 0 Both bits (7, 0) must be set simultaneously to exercise reset. 7.6.3.1.2 Register 3h, 4h (offset = 3h, 4h) [reset = 0h] Figure 86. Register 3h 7 6 5 4 3 JESD BANK PAGE SEL [7:0] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Figure 87. Register 4h 7 6 5 4 3 JESD BANK PAGE SEL [16:8] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 17. Register 3h, 4h Field Description Bit Name Type Reset Description 7-0 JESD BANK PAGE SEL R/W 0h Program these bits to access the desired page in the JESD bank. 6100h = Interleaving engine page selected 6141h = Decimation filter page selected 6800h = Main digital page selected 6900h = JESD digital page selected 6A00h = JESD analog page selected Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 45 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.1.3 Register 5h (offset = 5h) [reset = 0h] Figure 88. Register 5h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 DIS BROADCAST R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 18. Register 5h Field Description Bit Name Type Reset Description 7-1 0 W 0h Must write 0. DIS BROADCAST R/W 0h 0 = Normal operation. Channel A and B are programmed as a pair. Channel C and D are programmed as a pair. 1 = channel A and B can be individually programmed based on the CH bit. Similarly channel C and D can be individually programmed based on the CH bit. 0 7.6.3.1.4 Register 11h (offset = 11h) [reset = 0h] Figure 89. Register 11h 7 6 5 4 3 ANALOG PAGE SELECTION [7:0] R/W-0h 2 1 0 LEGEND: R/W = Read/Write; -n = value after reset Table 19. Register 11h Field Descriptions Bit Name Type Reset Description 7-0 ANALOG PAGE SELECTION [7:0] R/W 0h Register page (only one page at a time can be addressed). Master page = 80h ADC page = 0Fh The five digital pages (main digital, interleaving engine, analog JESD, digital JESD, and decimation filter) are selected via the M bit. See Table 11 in the Details of the Serial Interface section for more details. 7.6.3.2 Master Page (80h) 7.6.3.2.1 Register 20h (address = 20h) [reset = 0h], Master Page (080h) Figure 90. Register 20h 7 6 5 PDN ADC CHAB R/W-0h 4 3 2 1 PDN ADC CHCD R/W-0h 0 LEGEND: R/W = Read/Write; -n = value after reset Table 20. Registers 20h Field Descriptions 46 Bit Field Type Reset Description 7-4 PDN ADC CHAB R/W 0h 3-0 PDN ADC CHCD R/W 0h There are two power-down masks that are controlled via the PDN mask register bit in address 55h. The power-down mask 1 or mask 2 are selected via register bit 5 in address 26h. Power-down mask 1: addresses 20h and 21h. Power-down mask 2: addresses 23h and 24h. See the Power-Down Mode section for details. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.2.2 Register 21h (address = 21h) [reset = 0h], Master Page (080h) Figure 91. Register 21h 7 6 PDN BUFFER CHCD R/W-0h 5 4 PDN BUFFER CHAB R/W-0h 3 0 W-0h 2 0 R/W-0h 1 0 R/W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 21. Register 21h Field Descriptions Bit Field Type Reset Description 7-6 PDN BUFFER CHCD R/W 0h 5-4 PDN BUFFER CHAB R/W 0h There are two power-down masks that are controlled via the PDN mask register bit in address 55h. The power-down mask 1 or mask 2 are selected via register address 26h, bit 5. Power-down mask 1: addresses 20h and 21h. Power-down mask 2: addresses 23h and 24h. See the Power-Down Mode section for details. 3-0 0 W 0h Must write 0. 7.6.3.2.3 Register 23h (address = 23h), Master Page (080h) Figure 92. Register 23h 7 6 5 PDN ADC CHAB R/W-0h 4 3 W-0h 2 1 PDN ADC CHCD R/W-0h R/W-0h 0 W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 22. Register 23h Field Descriptions Bit Field Type Reset Description 7-4 PDN ADC CHAB R/W 0h 3-0 PDN ADC CHCD R/W 0h There are two power-down masks that are controlled via the PDN mask register bit in address 55h. The power-down mask 1 or mask 2 are selected via register bit 5 in address 26h. Power-down mask 1: addresses 20h and 21h. Power-down mask 2: addresses 23h and 24h. See the Power-Down Mode section for details. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 47 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.2.4 Register 24h (address = 24h) [reset = 0h], Master Page (080h) Figure 93. Register 24h 7 6 PDN BUFFER CHCD R/W-0h 5 4 PDN BUFFER CHAB R/W-0h 3 0 W-0h 2 0 R/W-0h 1 0 R/W-0h 0 0 R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 23. Register 24h Field Descriptions Bit Field Type Reset Description 7-6 PDN BUFFER CHCD R/W 0h 5-4 PDN BUFFER CHAB R/W 0h There are two power-down masks that are controlled via the PDN mask register bit in address 55h. The power-down mask 1 or mask 2 are selected via register address 26h, bit 5. Power-down mask 1: addresses 20h and 21h. Power-down mask 2: addresses 23h and 24h. See the Power-Down Mode section for details. 3-0 0 W 0h Must write 0. 7.6.3.2.5 Register 26h (address = 26h), Master Page (080h) Figure 94. Register 26h 7 GLOBAL PDN R/W-0h 6 OVERRIDE PDN PIN R/W-0h 5 PDN MASK SEL R/W-0h 4 0 R/W-0h 3 0 R/W-0h 2 0 R/W-0h 1 0 R/W-0h 0 0 R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 24. Register 26h Field Descriptions Bit Field Type Reset Description 7 GLOBAL PDN R/W 0h Bit 6 (OVERRIDE PDN PIN) must be set before this bit can be programmed. 0 = Normal operation 1 = Global power-down via the SPI 6 OVERRIDE PDN PIN R/W 0h This bit ignores the power-down pin control. 0 = Normal operation 1 = Ignores inputs on the power-down pin 5 PDN MASK SEL R/W 0h This bit selects power-down mask 1 or mask 2. 0 = Power-down mask 1 1 = Power-down mask 2 0 R/W 0h Must write 0 4-0 48 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.2.6 Register 3Ah (address = 3Ah) [reset = 0h], Master Page (80h) Figure 95. Register 3Ah 7 0 W-0h 6 BUFFER CURR INCREASE R/W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 25. Register 3Ah Field Descriptions Bit Name Type Reset Description 7 0 W 0h Must write 0. 6 BUFFER CURR INCREASE R/W 0h 0 = Normal operation 1 = Increases AVDD3V current by 30 mA., improves HD3, helpful for second Nyquist application. Ensure that the INPUT BUF CUR EN regiser bit is also set to 1. 0 W 0h Must write 0. 5-0 7.6.3.2.7 Register 39h (address = 39h) [reset = 0h], Master Page (80h) Figure 96. Register 39h 7 6 ALWAYS WRITE 1 R/W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 26. Register 39h Field Descriptions Bit Name Type Reset Description 7-6 ALWAYS WRITE 1 R/W 0h Always set these bits to 11. 5-0 0 W 0h Must write 0. 7.6.3.2.8 Register 53h (address = 53h) [reset = 0h], Master Page (80h) Figure 97. Register 53h Register 7 CLK DIV R/W-0h 6 MASK SYSREF R/W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 27. Register 53h Field Descriptions Bit Name Type Reset Description 7 CLK DIV R/W 0h This bit configures the input clock divider. 0 = Divide-by-4 1= Divide-by-2 (must be enabled for proper operation of the ADS54J66) 6 MASK SYSREF R/W 0h 0 = Normal operation 1 = Ignores the SYSREF input 0 W 0h Must write 0. 5-0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 49 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.2.9 Register 55h (address = 55h) [reset = 0h], Master Page (80h) Figure 98. Register 55h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 PDN MASK R/W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 28. Register 55h Field Descriptions Bit Name Type Reset Description 7-5 0 W 0h Must write 0. PDN MASK R/W 0h Power-down via register bit. 0 = Normal operation 1 = Power down enabled powering down internal blocks specified in the selected power-down mask 0 W 0h Must write 0. 4 3-0 7.6.3.2.10 Register 56h (address = 56h) [reset = 0h], Master Page (80h) Figure 99. Register 56h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 INPUT BUFF CURR EN R/W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 29. Register 56h Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. INPUT BUFF CURR EN R/W 0h 0 = Normal operation 1 = Increases AVDD3V current by 30 mA., improves HD3, helpful for second Nyquist application. Ensure that the BUFFER CURR INCREASE register bit is also set to 1. 0 W 0h Must write 0. 3 2-0 7.6.3.2.11 Register 59h (address = 59h) [reset = 0h], Master Page (80h) Figure 100. Register 59h 7 0 W-0h 6 0 W-0h 5 ALWAYS WRITE 1 R/W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 30. Register 59h Field Descriptions Bit Name Type Reset Description 7-6 0 W 0h Must write 0. ALWAYS WRITE 1 R/W 0h Always set this bit to 1. 0 W 0h Must write 0. 5 4-0 50 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.3 ADC Page (0Fh) 7.6.3.3.1 Register 5Fh (address = 5Fh) [reset = 0h], ADC Page (0Fh) Figure 101. Register 5Fh 7 6 5 4 3 2 1 0 FOVR THRESH R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 31. Register 5Fh Field Descriptions Bit Name Type Reset Description 7-0 FOVR THRESH R/W 0h These bits control the location of FAST OVR threshold for all four channels together; see the Overrange Indication section. 7.6.3.3.2 Register 60h (address = 60h) [reset = 0h], ADC Page (0Fh) Figure 102. Register 60h 7 PULSE BIT CHC R/W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 32. Register 60h Field Descriptions Bit 7 6-0 (1) Name Type Reset Description PULSE BIT CHC R/W 0h Pulse this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel C. (1) Before pulsing this bit, the HD3 NYQ2 CHCD register bit must be set to 1. 0 W 0h Must write 0. Pulsing = set the bit to 1 and then reset to 0. 7.6.3.3.3 Register 61h (address = 61h) [reset = 0h], ADC Page (0Fh) Figure 103. Register 61h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 HD3 NYQ2 CHCD R/W-0h 2 0 W-0h 1 0 W-0h 0 PULSE BIT CHD R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 33. Register 61h Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. HD3 NYQ2 CHCD R/W 0h Set this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel C and D. When this bit is set, the PULSE BIT CHx register bits must be pulsed to obtain the improvement in corresponding channels. 0 W 0h Must write 0. PULSE BIT CHD R/W 0h Pulse this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel D. (1) Before pulsing this bit, the HD3 NYQ2 CHCD register bit must be set to 1. 3 2-1 0 (1) Pulsing = set the bit to 1 and then reset to 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 51 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.3.4 Register 6Ch (address = 6Ch) [reset = 0h], ADC Page (0Fh) Figure 104. Register 6Ch 7 PULSE BIT CHA R/W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 34. Register 6Ch Field Descriptions Bit 7 6-0 (1) Name Type Reset Description PULSE BIT CHA R/W 0h Pulse this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel A. (1) Before pulsing this bit, the HD3 NYQ2 CHCAB register bit must be set to 1. 0 W 0h Must write 0. Pulsing = set the bit to 1 and then reset to 0. 7.6.3.3.5 Register 6Dh (address = 6Dh) [reset = 0h], ADC Page (0Fh) Figure 105. Register 6Dh 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 HD3 NYQ2 CHAB R/W-0h 2 0 W-0h 1 0 W-0h 0 PULSE BIT CHB R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 35. Register 6Dh Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. HD3 NYQ2 CHAB R/W 0h Set this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel A and B. When this bit is set, the PULSE BIT CHx register bits must be pulsed to obtain the improvement in corresponding channels. 0 W 0h Must write 0. PULSE BIT CHB R/W 0h Pulse this bit to improve HD3 for 2nd Nyquist frequencies (fIN > 250 MHz) for channel B. (1) Before pulsing this bit, the HD3 NYQ2 CHAB register bit must be set to 1. 3 2-1 0 (1) 52 Pulsing = set the bit to 1 and then reset to 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.3.6 Register 74h (address = 74h) [reset = 0h], ADC Page (0Fh) Figure 106. Register 74h 7 6 5 TEST PATTERN ON CHANNEL R/W-0h 4 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 36. Register 74h Field Descriptions Bit Field Type Reset Description 7-4 TEST PATTERN ON CHANNEL R/W 0h Test pattern output on channel A and B 0000 = Normal operation using ADC output data 0001 = Outputs all 0s 0010 = Outputs all 1s 0011 = Outputs toggle pattern: Output data are an alternating sequence of 101010101010 and 010101010101 0100 = Output digital ramp: output data increment by one LSB every clock cycle from code 0 to 16384 0110 = Single pattern: output data are custom pattern 1 (75h and 76h) 0111 = Double pattern: output data alternate between custom pattern 1 and custom pattern 2 1000 = Deskew pattern: output data are 2AAAh 1001 = SYNC pattern: output data are 3FFFh See the ADC Test Pattern section for more details. 3-0 0 W 0h Must write 0. 7.6.3.3.7 Register 75h (address = 75h) [reset = 0h], ADC Page (0Fh) Figure 107. Register 75h 7 6 5 4 3 CUSTOM PATTERN 1[13:6] R/W-0h 2 1 0 LEGEND: R/W = Read/Write; -n = value after reset Table 37. Register 75h Field Descriptions Bit Name Type Reset Description 7-0 CUSTOM PATTERN R/W 0h These bits set the custom pattern (13-6) for all channels; see the ADC Test Pattern section for more details. 7.6.3.3.8 Register 76h (address = 76h) [reset = 0h], ADC Page (0Fh) Figure 108. Register 76h 7 6 5 4 CUSTOM PATTERN 1[ 5:0] R/W-0h 3 2 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 38. Register 76h Field Descriptions Bit Name Type Reset Description 7-2 CUSTOM PATTERN R/W 0h These bits set the custom pattern (5-0) for all channels; see the ADC Test Pattern section for more details. 1-0 0 W 0h Must write 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 53 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.3.9 Register 77h (address = 77h) [reset = 0h], ADC Page (0Fh) Figure 109. Register 77h 7 6 5 4 3 CUSTOM PATTERN 2[13:6] R/W-0h 2 1 0 LEGEND: R/W = Read/Write; -n = value after reset Table 39. Register 77h Field Descriptions Bit Name Type Reset Description 7-0 CUSTOM PATTERN R/W 0h These bits set the custom pattern (13-6) for all channels; see the ADC Test Pattern section for more details. 7.6.3.3.10 Register 78h (address = 78h) [reset = 0h], ADC Page (0Fh) Figure 110. Register 78h 7 6 5 4 CUSTOM PATTERN 2[ 5:0] R/W-0h 3 2 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 40. Register 78h Field Descriptions 54 Bit Name Type Reset Description 7-2 CUSTOM PATTERN R/W 0h These bits set the custom pattern (5-0) for all channels; see the ADC Test Pattern section for more details. 1-0 0 W 0h Must write 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.4 Interleaving Engine Page (6100h) 7.6.3.4.1 Register 18h (address = 18h) [reset = 0h], Interleaving Engine Page (6100h) Figure 111. Register 18h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 IL BYPASS R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 41. Register 18h Field Descriptions Bit Name Type Reset Description 7-2 0 W 0h Must write 0. 1-0 IL BYPASS R/W 0h These bits allow bypassing of the interleaving correction, which is to be used when ADC test patterns are enabled. 00 = Interleaving correction enabled 11 = Interleaving correction bypassed 7.6.3.4.2 Register 68h (address = 68h) [reset = 0h], Interleaving Engine Page (6100h) Figure 112. Register 68h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 1 DC CORR DIS R/W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 42. Register 68h Field Descriptions Bit Name Type Reset Description 7-3 0 W 0h Must write 0. 2-1 DC CORR DIS R/W 0h These bits enable the dc offset correction loop. 00 = DC offset correction enabled 11 = DC offset correction disabled Others = Do not use 0 W 0h Must write 0. 0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 55 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.5 Decimation Filter Page (6141h) Registers 7.6.3.5.1 Register 0h (address = 0h) [reset = 0h], Decimation Filter Page (6141h) Figure 113. Register 0h 7 6 5 CHB/C FINE MIX R/W-0h 4 3 2 1 0 DDC MODE R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 43. 0h Field Descriptions Bit Field Type Reset Description 7-4 CHB/C FINE MIX R/W 0h These bits select fine mixing frequency for the N × fS / 16 mixer, where N is a twos complement number varying from –8 to 7. 0000 = N is 0 0001 = N is 1 0010 = N is 2 ... 0111 = N is 7 1000 = N is –8 ... 1111 = N is –1 3-0 DDC MODE R/W 0h These bits select DDC mode for all channels; see Table 44 for bit settings. Table 44. DDC MODE Bit Settings SETTING MODE 000 0 fS / 4 mixing with decimation-by-2, complex output 001 – N/A 010 2 Decimation-by-2, high or low pass filter, real output 011 – N/A 100 4 Decimation-by-2, N × fS / 16 mixer, real output 101 5 Decimation-by-2, N × fS / 16 mixer, complex output 6 Decimation-by-4, N × fS / 16 mixer, complex output. Ensure that the DDC MODE 6 EN[3:1] register bits are also set to 111. 111 7 Decimation-by-2, N × fS / 16 mixer, insert 0, real output 1000 8 No decimation, no mixing, straight 500-MSPS data output Others – Do not use 110 56 DESCRIPTION Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.5.2 Register 1h (address = 1h) [reset = 0h], Decimation Filter Page (6141h) Figure 114. Register 1h 7 6 5 4 0 0 0 0 W-0h W-0h W-0h W-0h 3 DDC MODE6 EN1 R/W-0h 2 ALWAYS WRITE 1 R/W-0h 1 CHB/C HPF EN R/W-0h 0 CHB/C COARSE MIX R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 45. Register 1h Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. 3 DDC MODE6 EN1 R/W 0h Set this bit along with the DDC MODE6 EN2 and DDC MODE6 EN3 register bits for proper operation of mode 6. 0 = Default 1 = Use for proper operation of DDC mode 6 2 ALWAYS WRITE 1 R/W 0h Always write this bit to 1. 1 CHB/C HPF EN R/W 0h This bit enables the high-pass filter for DDC mode 2 for channel B and C. 0 = Low-pass filter enabled 1 = High-pass filter enabled 0 CHB/C COARSE MIX R/W 0h This bit selects the fS / 4 mixer phase for DDC mode 0 for channel B and C. 0 = Mix with fS / 4 1 = Mix with –fS / 4 7.6.3.5.3 Register 2h (address = 2h) [reset = 0h], Decimation Filter Page (6141h) Figure 115. Register 2h 7 6 5 0 0 CHA/D HPF EN W-0h W-0h R/W-0h 4 CHA/D COARSE MIX R/W-0h 3 2 1 0 CHA/D FINE MIX R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 46. 2h Field Descriptions Bit Name Type Reset Description 7-6 0 W 0h Must write 0. 5 CHA/D HPF EN R/W 0h This bit enables the high-pass filter for DDC mode 2 for channel A and D. 0 = Low-pass filter enabled 1 = High-pass filter enabled 4 CHA/D COARSE MIX R/W 0h This bit selects the fS / 4 mixer phase for DDC mode 0 for channel A and D. 0 = Mix with fS / 4 1 = Mix with –fS / 4 CHA/D FINE MIX R/W 0h These bits select the fine mixing frequency for the N × fS / 16 mixer, where N is a twos complement number varying from –8 to 7. 0000 = N is 0 0001 = N is 1 0010 = N is 2 ... 0111 = N is 7 1000 = N is –8 ... 1111 = N is –1 3-0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 57 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.6 Main Digital Page (6800h) Registers 7.6.3.6.1 Register 0h (address = 0h) [reset = 0h], Main Digital Page (6800h) Figure 116. Register 0h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 IL RESET R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 47. Register 0h Field Descriptions Bit Name Type Reset Description 7-1 0 W 0h Must write 0. IL RESET R/W 0h This bit resets the interleaving engine. This bit is not a selfclearing bit and must be pulsed (1). Any register bit in the main digital page (6800h) takes effect only after this bit is pulsed. Also, note that pulsing this bit clears registers in the interleaving page (6100h). 0 = Normal operation 0 → 1 → 0 = Interleaving engine reset 0 (1) Pulsing = set the bit to 1 and then reset to 0. 7.6.3.6.2 Register 42h (address = 42h) [reset = 0h], Main Digital Page (6800h) Figure 117. Register 42h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 1 NYQUIST ZONE R/W-0h 0 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 48. Register 42h Field Descriptions Bit Name Type Reset Description 7-3 0 W 0h Must write 0. 2-0 NYQUIST ZONE R/W 0h These bits provide Nyquist zone information to the interleaving engine. Ensure that the CTRL NYQUIST register bit is set to 1. 000 = 1st Nyquist zone (input frequencies between 0 to fS / 2) 001 = 2nd Nyquist zone (input frequencies between fS / 2 to fS) 010 = 3rd Nyquist zone (input frequencies between fS to 3 fS / 2) ... 111 = 8th Nyquist zone (input frequencies between 7 fS / 2 to 4 fS) 7.6.3.6.3 Register 4Eh (address = 4Eh) [reset = 0h], Main Digital Page (6800h) Figure 118. Register 4Eh 7 CTRL NYQUIST R/W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 49. Register 4Eh Field Descriptions Bit 7 6-0 58 Name Reset Description CTRL NYQUIST R/W Type 0h Enables Nyquist zone control using register bits NYQUIST ZONE. 0 = Selection disabled 1 = Selection enabled 0 0h Must write 0. W Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.6.4 Register ABh (address = ABh) [reset = 0h], Main Digital Page (6800h) Figure 119. Register ABh 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 OVR EN R/W-0h 1 0 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 50. Register ABh Field Descriptions Bit Field Type Reset Description 7-1 0 W 0h Must write 0. OVR EN R/W 0h Set this bit to enable the OVR ON LSB register bit. 0 = Normal operation 1 = OVR ON LSB enabled 0 7.6.3.6.5 Register ADh (address = ADh) [reset = 0h], Main Digital Page (6800h) Figure 120. Register ADh 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 2 OVR ON LSB R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 51. Register ADh Field Descriptions Bit Field Type Reset Description 7-4 0 W 0h Must write 0. 3-0 OVR EN R/W 0h Set this bit to bring OVR on two LSBs of the 16-bit output. Ensure that the OVR EN register bit is set to 1. 0000 = Bits 0 and 1 of the 16-bit data are noise bits 0011 = OVR comes on bit 0 of the 16-bit data 1100 = OVR comes on bit 1 of the 16-bit data 1111 = OVR comes on both bits 0 and 1 of the 16-bit data 7.6.3.6.6 Register F7h (address = F7h) [reset = 0h], Main Digital Page (68h) Figure 121. Register F7h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 DIG RESET R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 52. Register F7h Field Descriptions Bit Field Type Reset Description 7-1 0 W 0h Must write 0. DIG RESET R/W 0h Self-clearing reset for the digital block. Does not include the interleaving correction. 0 = Normal operation 1 = Digital reset 0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 59 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.7 JESD Digital Page (6900h) Registers 7.6.3.7.1 Register 0h (address = 0h) [reset = 0h], JESD Digital Page (6900h) Figure 122. Register 0h 7 6 JESD MODE EN R/W-0h CTRL K R/W-0h 5 DDC MODE6 EN2 R/W-0h 4 TESTMODE EN R/W-0h 3 2 1 0 0 LANE ALIGN FRAME ALIGN TX LINK DIS W-0h R/W-0h R/W-0h R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 53. Register 0h Field Descriptions Bit 60 Name Type Reset Description 7 CTRL K R/W 0h Enable bit for a number of frames per multi frame. 0 = Default is five frames per multi frame 1 = Frames per multi frame can be set in register 06h 6 JESD MODE EN R/W 0h Allows changing the JESD MODE setting in register 01h (bits 1-0) 0 = Disabled 1 = Enables changing the JESD MODE setting 5 DDC MODE6 EN2 R/W 0h Set this bit along with the DDC MODE6 EN1 and DDC MODE6 EN3 register bits for proper operation of mode 6. 0 = Default 1 = Use for proper operation of DDC mode 6 4 TESTMODE EN R/W 0h This bit generates the long transport layer test pattern mode, as per section 5.1.6.3 of the JESD204B specification. 0 = Test mode disabled 1 = Test mode enabled 3 0 W 0h Must write 0. 2 LANE ALIGN R/W 0h This bit inserts the lane alignment character (K28.3) for the receiver to align to lane boundary, as per section 5.3.3.5 of the JESD204B specification. 0 = Normal operation 1 = Inserts lane alignment characters 1 FRAME ALIGN R/W 0h This bit inserts the lane alignment character (K28.7) for the receiver to align to lane boundary, as per section 5.3.3.5 of the JESD204B specification. 0 = Normal operation 1 = Inserts frame alignment characters 0 TX LINK DIS R/W 0h This bit disables sending the initial link alignment (ILA) sequence when SYNC is de-asserted. 0 = Normal operation 1 = ILA disabled Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.7.2 Register 1h (address = 1h) [reset = 0h], JESD Digital Page (6900h) Figure 123. Register 1h 7 6 SYNC REG SYNC REG EN R/W-0h R/W-0h 5 SYNCB SEL AB/CD R/W-0h 4 0 W-0h 3 DDC MODE6 EN3 R/W-0h 2 1 0 0 JESD MODE W-0h R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 54. Register 1h Field Descriptions Bit Name Type Reset Description 7 SYNC REG R/W 0h SYNC register (bit 6 must be enabled). 0 = Normal operation 1 = ADC output data are replaced with K28.5 characters 6 SYNC REG EN R/W 0h Enables bit for SYNC operation. 0 = Normal operation 1 = ADC output data overwrite enabled 5 SYNCB SEL AB/CD R/W 0h This bit selects which SYNCb input controls the JESD interface; must be configured for ch AB and ch CD. 0 = SYNCbAB 1 = SYNCbCD 4 0 W 0h Must write 0. 3 DDC MODE6 EN3 R/W 0h Set this bit along with the DDC MODE6 EN1 and DDC MODE6 EN2 register bits for proper operation of mode 6. 0 = Default 1 = Use for proper operation of DDC mode 6 2 0 W 0h Must write 0. JESD MODE R/W 0h These bits select the number of serial JESD output lanes per ADC. The JESD MODE EN (00h) and JESD PLL MODE register (JESD ANALOG page, register 16h) must also be set accordingly. 01 = 20x mode 10 = 40x mode 11 = 80x mode All others = Not used 1-0 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 61 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.7.3 Register 2h (address = 2h) [reset = 0h], JESD Digital Page (6900h) Figure 124. Register 2h 7 6 5 4 LINK LAYER RPAT R/W-0h LINK LAYER TESTMODE R/W-0h 3 LMFC MASK RESET R/W-0h 2 1 0 0 W-0h W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 55. Register 2h Field Descriptions Bit Name Type Reset Description 7-5 LINK LAYER TESTMODE R/W 0h These bits generate a pattern according to clause 5.3.3.8.2 of the JESD204B document. 000 = Normal ADC data 001 = D21.5 (high-frequency jitter pattern) 010 = K28.5 (mixed-frequency jitter pattern) 011 = Repeat initial lane alignment (generates a K28.5 character and continuously repeats lane alignment sequences) 100 = 12-octet RPAT jitter pattern 4 LINK LAYER RPAT R/W 0h This bit changes the running disparity in the modified RPAT pattern test mode (only when the link layer test mode = 100). 0 = Normal operation 1 = Changes disparity 3 LMFC MASK RESET R/W 0h 0 = Default 1 = Resets the LMFC mask 0 W 0h Must write 0. 2-0 7.6.3.7.4 Register 3h (address = 3h) [reset = 0h], JESD Digital Page (6900h) Figure 125. Register 3h 7 FORCE LMFC COUNT R/W-0h 6 5 4 LMFC COUNT INIT R/W-0h 3 2 1 0 RELEASE ILANE SEQ R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 56. Register 3h Field Descriptions Bit Name Type Reset Description FORCE LMFC COUNT R/W 0h This bit forces the LMFC count. 0 = Normal operation 1 = Enables using a different starting value for the LMFC counter 6-2 LMFC COUNT INIT R/W 0h SYSREF coming to the digital block resets the LMFC count to 0 and K28.5 stops coming when the LMFC count reaches 31. The initial value that the LMFC count resets to can be set using LMFC COUNT INIT. In this manner, Rx can be synchronized early because it receives the LANE ALIGNMENT SEQUENCE early. The FORCE LMFC COUNT register bit must be enabled. 1-0 RELEASE ILANE SEQ R/W 0h These bits delay the generation of lane alignment sequence by 0, 1, 2, or 3 multi frames after code group synchronization. 00 = 0 01 = 1 10 = 2 11 = 3 7 62 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.7.5 Register 5h (address = 5h) [reset = 0h], JESD Digital Page (6900h) Figure 126. Register 5h 7 SCRAMBLE EN R/W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 57. Register 5h Field Descriptions Bit 7 6-0 Name Type Reset Description SCRAMBLE EN R/W 0h Scramble enable bit in the JESD204B interface. 0 = Scrambling disabled 1 = Scrambling enabled 0 W 0h Must write 0. 7.6.3.7.6 Register 6h (address = 6h) [reset = 0h], JESD Digital Page (6900h) Figure 127. Register 6h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 3 2 1 FRAMES PER MULTI FRAME (K) R/W-0h 0 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 58. Register 6h Field Descriptions Bit Name Type Reset Description 7-5 0 W 0h Must write 0. 4-0 FRAMES PER MULTI FRAME (K) R/W 0h These bits set the number of multi frames. Actual K is the value in hex + 1 (that is, 0Fh is K = 16). 7.6.3.7.7 Register 19h (address = 19h) [reset = 0h], JESD Digital Page (6900h) Figure 128. Register 19h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 2 1 0 LC[27:24] R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 59. Register 19h Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. 3-0 LC[27:24] R/W 0h These bits set the low resolution counter value. When programming LC[27:0], first program LC[7:0], then LC[15:8], then LC[23:16], and then LC[27:24] in the same order. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 63 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.7.8 Register 1Ah (address = 1Ah) [reset = 0h], JESD Digital Page (6900h) Figure 129. Register 1Ah 7 6 5 4 3 2 1 0 LC[23:16] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 60. 1Ah Field Descriptions Bit Name Type Reset Description 7-0 LC[23:16] R/W 0h These bits set the low resolution counter value. When programming LC[27:0], first program LC[7:0], then LC[15:8], then LC[23:16], and then LC[27:24] in the same order. 7.6.3.7.9 Register 1Bh (address = 1Bh) [reset = 0h], JESD Digital Page (6900h) Figure 130. Register 1Bh 7 6 5 4 3 2 1 0 LC[15:8] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 61. Register 1Bh Field Descriptions Bit Name Type Reset Description 7-0 LC[15:8] R/W 0h These bits set the low resolution counter value. When programming LC[27:0], first program LC[7:0], then LC[15:8], then LC[23:16], and then LC[27:24] in the same order. 7.6.3.7.10 Register 1Ch (address = 1Ch) [reset = 0h], JESD Digital Page (6900h) Figure 131. Register 1Ch 7 6 5 4 3 2 1 0 LC[7:0] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 62. Register 1Ch Field Descriptions 64 Bit Name Type Reset Description 7-0 LC[7:0] R/W 0h These bits set the low resolution counter value. When programming LC[27:0], first program LC[7:0], then LC[15:8], then LC[23:16], and then LC[27:24] in the same order. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.7.11 Register 1Dh (address = 1Dh) [reset = 0h], JESD Digital Page (6900h) Figure 132. Register 1Dh 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 2 1 0 HC[27:24] R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 63. Register 1Dh Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. 3-0 HC [xx:xx] R/W 0h These bits set the high resolution counter value. When programming HC[27:0], first program HC[7:0], then HC[15:8], then HC[23:16], and then HC[27:24] in the same order. 7.6.3.7.12 Register 1Eh (address = 1Eh) [reset = 0h], JESD Digital Page (6900h) Figure 133. Register 1Eh 7 6 5 4 3 2 1 0 HC[23:16] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 64. Register 1Eh Field Descriptions Bit Name Type Reset Description 7-0 HC[23:16] R/W 0h These bits set the high resolution counter value. When programming HC[27:0], first program HC[7:0], then HC[15:8], then HC[23:16], and then HC[27:24] in the same order. 7.6.3.7.13 Register 1Fh (address = 1Fh) [reset = 0h], JESD Digital Page (6900h) Figure 134. Register 1Fh 7 6 5 4 3 2 1 0 HC[15:8] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 65. Register 1Fh Field Descriptions Bit Name Type Reset Description 7-0 HC[15:8] R/W 0h These bits set the high resolution counter value. When programming HC[27:0], first program HC[7:0], then HC[15:8], then HC[23:16], and then HC[27:24] in the same order. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 65 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.7.14 Register 20h (address = 20h) [reset = 0h], JESD Digital Page (6900h) Figure 135. Register 20h 7 6 5 4 3 2 1 0 HC[7:0] R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 66. Register 20h Field Descriptions Bit Name Type Reset Description 7-0 HC[7:0] R/W 0h These bits set the high resolution counter value. When programming HC[27:0], first program HC[7:0], then HC[15:8], then HC[23:16], and then HC[27:24] in the same order. 7.6.3.7.15 Register 21h (address = 21h) [reset = 0h], JESD Digital Page (6900h) Figure 136. Register 21h 7 6 OUTPUT CHA MUX SEL R/W-0h 5 4 OUTPUT CHB MUX SEL R/W-0h 3 2 OUTPUT CHC MUX SEL R/W-0h 1 0 OUTPUT CHD MUX SEL R/W-0h LEGEND: R/W = Read/Write; -n = value after reset Table 67. 21h Field Descriptions 66 Bit Name Type Reset Description 7-6 OUTPUT CHA MUX SEL R/W 0h SERDES lane swap with ch B. 00 = Ch A is output on lane DA 10 = Ch A is output on lane DB 01, 11 = Do not use 5-4 OUTPUT CHB MUX SEL R/W 0h SERDES lane swap with ch A. 00 = Ch B is output on lane DB 10 = Ch B is output on lane DA 01, 11 = Do not use 3-2 OUTPUT CHC MUX SEL R/W 0h SERDES lane swap with ch D. 00 = Ch C is output on lane DC 10 = Ch C is output on lane DD 01, 11 = Do not use 1-0 OUTPUT CHD MUX SEL R/W 0h SERDES lane swap with ch C. 00 = Ch D is output on lane DD 10 = Ch D is output on lane DC 01, 11 = Do not use Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 7.6.3.7.16 Register 22h (address = 22h) [reset = 0h], JESD Digital Page (6900h) Figure 137. Register 22h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 OUT CHA INV R/W-0h 2 OUT CHB INV R/W-0h 1 OUT CHC INV R/W-0h 0 OUT CHD INV R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 68. 22h Field Descriptions Bit Name Type Reset Description 7-4 0 W 0h Must write 0. 3 OUT CHA INV R/W 0h Polarity inversion of JESD output of ch A. 0 = Normal operation 1 = Output polarity inverted 2 OUT CHB INV R/W 0h Polarity inversion of JESD output of ch B. 0 = Normal operation 1 = Output polarity inverted 1 OUT CHC INV R/W 0h Polarity inversion of JESD output of ch C. 0 = Normal operation 1 = Output polarity inverted 0 OUT CHD INV R/W 0h Polarity inversion of JESD output of ch D. 0 = Normal operation 1 = Output polarity inverted 7.6.3.8 JESD Analog Page (6A00h) Register 7.6.3.8.1 Register 12h, 13h (address 12h, 13h) [reset = 0h], JESD Analog Page (6Ah) Figure 138. Register 12h 7 6 5 4 SEL EMP LANE DA/DD R/W-0h 3 2 1 0 W-0h 0 0 W-0h 2 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Figure 139. Register 13h 7 6 5 4 SEL EMP LANE DB/DC R/W-0h 3 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 69. 12h, 13h Field Descriptions Bit Name Type Reset Description 7-2 SEL EMP LANE DA/DD SEL EMP LANE DB/DC R/W 0h Selects the amount of de-emphasis for the JESD output transmitter. The de-emphasis value in dB is measured as the ratio between the peak value after the signal transition to the settled value of the voltage in one bit period. 0 = 0 dB 1 = –1 dB 3 = –2 dB 7 = –4.1 dB 15 = –6.2 dB 31 = –8.2 dB 63 = –11.5 dB 1-0 0 W 0h Must write 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 67 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 7.6.3.8.2 16h (address = 16h) [reset = 0h], JESD Analog Page (6A00h) Figure 140. Register 16h 7 0 W-0h 6 0 W-0h 5 0 W-0h 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 JESD PLL MODE R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 70. 16h Field Descriptions Bit Name Type Reset Description 7-1 0 W 0h Must write 0. JESD PLL MODE R/W 0h This bit selects the JESD PLL multiplication factor. 0 = 20x mode 1 = 40x mode 0 7.6.3.8.3 Register 1Bh (address = 1Bh) [reset = 0h], JESD Analog Page (6Ah) Figure 141. Register 1Bh 7 6 JESD SWING R/W-0h 5 4 0 W-0h 3 0 W-0h 2 0 W-0h 1 0 W-0h 0 0 W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 71. 1Bh Field Descriptions 68 Bit Name Type Reset Description 7-5 JESD SWING R/W 0h This bit programs the SERDES output swing. 0 = 860 mVPP 1 = 810 mVPP 2 = 770 mVPP 3 = 745 mVPP 4 = 960 mVPP 5 = 930 mVPP 6 = 905 mVPP 7 = 880 mVPP 4-3 0 W 0h Must write 0. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information 8.1.1 Start-Up Sequence The following steps are recommended as the power-up sequence with the ADS54J66 in DDC mode 8 (no decimation) with LMFS = 4421 (shown in Table 72). Table 72. Recommended Power-Up Sequence STEP DESCRIPTION REGISTER ADDRESS REGISTER DATA COMMENT 1 Supply all supply voltages. There is no required power supply sequence for the 1.15-V supply, 1.9-V supply, and 3-V supply, and they can be supplied in any order. — — — 2 Pulse a hardware reset (low to high to low) on pin 48. — — — Alternatively, the device can be reset with an analog reset and a digital reset. 0000h 4004h 4003h 4002h 4001h 60F7h 60F7h 70F7h 70F7h 81h 68h 00h 00h 00h 01h 00h 01h 00h — 3 Set the input clock divider. 0011h 0053h 0039h 0059h 80h 80h C0h 20h Select the master page in the analog bank. Set the clock divider to divide-by-2. Set the ALWAYS WRITE 1 bit for all channels. Set the ALWAYS WRITE 1 bit for all channels. 4 Reset the interleaving correction engine in register 6800h of the main digital page of the JESD bank. (Register access is already set to page 6800h in step 2.) 6000h 6000h 7000h 7000h 01h 00h 01h 00h Resets the interleaving engine for channel A, B (because the device is in broadcast mode). Resets the interleaving engine for channel C, D (because the device is in broadcast mode). 5 Set DDC mode 8 for all channels (no decimation, 14-bit, 500-MSPS data output). 4004h 4003h 61h 41h Select the decimation filter page of the JESD bank. 6000h 7000h 08h 08h Select DDC mode 8 for channel A, B. Select DDC mode 8 for channel C, D. 6001h 7001h 04h 04h Set the ALWAYS WRITE 1 bit for channel A, B. Set the ALWAYS WRITE 1 bit for channel C, D. 4003h 4004h 00h 6Ah Select the analog page in the JESD bank. 6016h 7016h 02h 02h PLL mode 40x for channel A, B. PLL mode 40x for channel C, D. 6 Default registers for the analog page of the JESD bank. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 69 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Application Information (continued) Table 72. Recommended Power-Up Sequence (continued) STEP 7 DESCRIPTION REGISTER ADDRESS REGISTER DATA 4003h 4004h 00h 69h Select the digital page in the JESD bank. 6000h 6001h 7000h 7001h 20h 01h 20h 01h Enable JESD MODE control for channel A, B. Set JESD MODE to 20x mode for LMFS = 4421. Enable JESD MODE control for channel C, D. Set JESD MODE to 20x mode for LMFS = 4421. 6000h 6006h 7000h 7006h 80h 0Fh 80h 0Fh Set CTRL K for channel A, B. Set K to 16. Set CTRL K for channel C, D. Set K to 16. 4005h 7001h 01h 20h Disable broadcast mode. Use SYNCbABP, SYNCbABM to issue a SYNC request for all four channels. Default registers for the digital page of the JESD bank. COMMENT 8 Enable a single SYNCb input (on the SYNCbAB pin). 9 Pulse SYNCbAB (pins 55 and 56) from high to low. — — K28.5 characters are transmitted by all four channels (CGS phase). 10 Pulse SYNCbAB (pins 55 and 56) from low to high. — — The ILA sequence begins and lasts for four multiframes. The device transmits ADC data after the ILA sequence ends. 8.1.2 Hardware Reset 8.1.2.1 Register Initialization After power-up, the internal registers can be initialized to their default values through a hardware reset by applying a high pulse on the RESET pin (of durations greater than 10 ns), as shown in Figure 142. Alternatively, the serial interface registers can be cleared a set of register writes as described in the Start-Up Sequence section. Table 73 lists the timing requirements for the pulse signal on the RESET pin. Power Supplies t1 RESET t2 t3 SEN Figure 142. Hardware Reset Timing Diagram Table 73. Timing Requirements for Hardware Reset MIN TYP MAX UNIT t1 Power-on delay from power-up to active high RESET pulse 1 ms t2 Reset pulse duration : active high RESET pulse duration 10 ns t3 Register write delay from RESET disable to SEN active 100 ns 70 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 8.1.3 SNR and Clock Jitter The signal-to-noise ratio of the ADC is limited by three different factors (as shown in Equation 2): the quantization noise is typically not noticeable in pipeline converters and is 84 dB for a 14-bit ADC. The thermal noise limits the SNR at low input frequencies and the clock jitter sets the SNR for higher input frequencies. (2) The SNR limitation resulting from sample clock jitter can be calculated by Equation 3: (3) The total clock jitter (TJitter) has two components: the internal aperture jitter (120 fs for the ADS54J66) that is set by the noise of the clock input buffer and the external clock jitter. TJitter can be calculated by Equation 4: (4) External clock jitter can be minimized by using high-quality clock sources and jitter cleaners as well as band-pass filters at the clock input; a faster clock slew rate also improves the ADC aperture jitter. The ADS54J66 has a thermal noise of approximately 72 dBFS and an internal aperture jitter of 120 fs. 8.1.4 ADC Test Pattern The ADS54J66 provides several different options to output test patterns instead of the actual output data of the ADC in order to simplify bring up of the JESD204B digital interface link. The output data path is shown in Figure 143. ADC Section Transport Layer Link Layer PHY Layer DDC ADC Interleaving Correction DDC Block ADC Test Pattern Data Mapping Frame Construction Scrambler 1+x14+x15 JESD204B Long Transport Layer Test Pattern 8b/10b Encoding Serializer JESD204B Link Layer Test Pattern Figure 143. ADC Test Pattern Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 71 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 8.1.4.1 ADC Section The ADC test pattern replaces the actual output data of the ADC. The following test patterns are available in register 74h. In order to properly obtain the test pattern output, the interleaving correction must be disabled (6100h, address 18h) and DDC mode-8 must be selected (un-decimated output). In un-decimated output (DDC mode-8), the device supports LMFS = 4421 only. Available ADC test patterns are summarized in Table 74. Table 74. ADC Test Pattern Settings BIT 7-4 NAME DEFAULT TEST PATTERN 0000 DESCRIPTION These bits provide the test pattern output on channels A and B. 0000 = Normal operation using ADC output data 0001 = Outputs all 0s 0010 = Outputs all 1s 0011 = Outputs toggle pattern: output data are an alternating sequence of 101010101010 and 010101010101 0100 = Output digital ramp: output data increment by one LSB every clock cycle from code 0 to 16384 0110 = Single pattern: output data are custom pattern 1 (75h and 76h) 0111 = Double pattern: output data alternate between custom pattern 1 and custom pattern 2 1000 = Deskew pattern: output data are 2AAAh 1001 = SYNC pattern: output data are 3FFFh 8.1.4.2 Transport Layer Pattern The transport layer maps the ADC output data into 8-bit octets and constructs the JESD204B frames using the LMFS parameters. Tail bits or 0s are added when needed. Alternatively, the JESD204B long transport layer test pattern can be substituted as shown in Table 75. Table 75. Transport Layer Test Mode BIT 4 NAME TESTMODE EN DEFAULT 0 DESCRIPTION This bit generates the long transport layer test pattern mode according to clause 5.1.6.3 of the JESD204B specification. 0 = Test mode disabled 1 = Test mode enabled 8.1.4.3 Link Layer Pattern The link layer contains the scrambler and the 8b/10b encoding of any data passed on from the transport layer. Additionally, the link layer also handles the initial lane alignment sequence that can be manually restarted. The link layer test patterns are intended for testing the quality of the link (jitter testing and so forth). The test patterns do not pass through the 8b/10b encoder and contain the options shown in Table 76. Table 76. Link Layer Test Mode BIT 7-5 NAME LINK LAYER TESTMODE DEFAULT DESCRIPTION 000 These bits generate the pattern according to clause 5.3.3.8.2 of the JESD204B document. 000 = Normal ADC data 001 = D21.5 (high-frequency jitter pattern) 010 = K28.5 (mixed-frequency jitter pattern) 011 = Repeat initial lane alignment (generates a K28.5 character and repeats lane alignment sequences continuously) 100 = 12-octet RPAT jitter pattern Furthermore, a 215 PRBS can be enabled by setting up a custom test pattern (AAAA) in the ADC section and running that through the 8b/10b encoder with scrambling enabled. 72 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 8.2 Typical Application The ADS54J66 is designed for wideband receiver applications demanding excellent dynamic range over a large input frequency range. A typical schematic for an ac-coupled dual receiver (dual FPGA with dual SYNC) is shown in Figure 144. DVDD 5 25 10 k 25 0.1 uF Driver 0.1 uF 3.3 pF GND 25 SPI Master 25 5 GND 0.1 uF 25 5 GND INCP AVDD AVDD 0.1 uF GND AGND NC NC GND 0.1 uF AVDD3V AVDD3V AVDD AVDD 0.1 uF GND 10 nF AGND CLKINP 100 CLKINM AGND GND 0.1 uF AVDD Low Jitter Clock Generator AVDD AVDD3V AVDD3V 0.1 uF GND AGND SYSREFP 100 SYSREFM AVDD AVDD 5 INBP 10 8 7 6 5 3 2 4 NC IOVDD SDIN SCLK SEN DVDD 9 NC 11 AVDD SDOUT 12 DGND 13 AVDD INDP AVDD INDM 14 100 20 71 21 70 22 69 23 68 24 67 25 66 26 65 27 64 ADS54J66 28 29 Differential 1 63 62 GND PAD (backside) 30 61 31 60 32 59 33 58 34 57 35 56 36 55 SYNCbCDP 50 Vterm=1.2 V SYNCbCDM 50 FPGA IOVDD IOVDD 10 nF GND DDP 10 nF DDM DGND 10 nF GND DCP DCM IOVDD IOVDD 0.1 uF GND DGND DBM DBP DGND 10 nF GND DAM DAP IOVDD IOVDD 10 nF 10 nF GND SYNCbABM 50 SYNCbABP 50 FPGA Vterm=1.2 V 25 AVDD3V AVDD GND 53 54 100 Differential NC 52 NC 51 DGND 50 IOVDD 49 PDN 48 SCAN_EN 47 RESET 46 DVDD 45 AVDD 44 AVDD 43 AVDD 42 INAP 41 INAM 40 AVDD 3.3 pF 25 5 39 AVDD3V GND 38 AVDD3V 37 0.1 uF 25 15 DVDD 72 INBM Driver 0.1 uF 16 0.1 uF AVDD 19 AVDD 25 17 AVDD3V 3.3 pF 18 25 AVDD 25 0.1 uF INCM 25 0.1 uF IOVDD GND 0.1 uF AVDD3V AVDD AVDD3V 5 Driver 0.1 uF AVDD3V GND DVDD AVDD AVDD3V 0.1 uF GND 0.1 uF GND 0.1 uF IOVDD GND 5 25 Driver 25 0.1 uF 0.1 uF GND 25 3.3 pF 5 25 GND = AGND + DGND connected in Layout NOTE: GND = AGND and DGND are connected in the PCB layout. Figure 144. Application Diagram for the ADS54J66 8.2.1 Design Requirements By using the simple drive circuit of Figure 144 (when the amplifier drives the ADC) or Figure 51 (when transformers drive the ADC), uniform performance can be obtained over a wide frequency range. The buffers present at the analog inputs of the device help isolate the external drive source from the switching currents of the sampling circuit. 8.2.2 Detailed Design Procedure For optimum performance, the analog inputs must be driven differentially. This architecture improves the common-mode noise immunity and even-order harmonic rejection. A small resistor (5 Ω to 10 Ω) in series with each input pin is recommended to damp out ringing caused by package parasitics, as shown in Figure 144. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 73 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Typical Application (continued) 8.2.3 Application Curves 0 0 -20 -20 Amplitude (dBFS) Amplitude (dBFS) Figure 145 and Figure 146 show the typical performance at 190 MHz and 230 MHz, respectively. -40 -60 -80 -100 -40 -60 -80 -100 -120 -120 0 50 100 150 Input Frequency (MHz) 200 250 0 D003 fIN = 190 MHz, AIN = –1 dBFS, SNR = 69.4 dBFS, SFDR = 88 dBc, SFDR = 96 dBc (non 23) 50 100 150 Input Frequency (MHz) 200 250 D004 fIN = 230 MHz, AIN = –1 dBFS, SNR = 69.4 dBFS, SFDR = 85 dBc, SFDR = 96 dBc (non 23) Figure 145. FFT for 190-MHz Input Signal Figure 146. FFT for 230-MHz Input Signal 9 Power Supply Recommendations The device requires a 1.9-V nominal supply for DVDD, a 1.9-V nominal supply for AVDD, and a 3-V nominal supply for AVDD3V. There is no specific sequence for power-supply requirements during device power-up. AVDD, DVDD, and AVDD3V can power-up in any order. 74 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 ADS54J66 www.ti.com SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 10 Layout 10.1 Layout Guidelines The device evaluation module (EVM) layout can be used as a reference layout to obtain the best performance. A layout diagram of the EVM top layer is provided in Figure 147. A complete layout of the EVM is available at the ADS54J66 EVM folder. Some important points to remember during board layout are: • Analog inputs are located on opposite sides of the device pinout to ensure minimum crosstalk on the package level. To minimize crosstalk onboard, the analog inputs must exit the pinout in opposite directions, as shown in the reference layout of Figure 147 as much as possible. • In the device pinout, the sampling clock is located on a side perpendicular to the analog inputs in order to minimize coupling between them. This configuration is also maintained on the reference layout of Figure 147 as much as possible. • Keep digital outputs away from the analog inputs. When these digital outputs exit the pinout, the digital output traces must not be kept parallel to the analog input traces because this configuration can result in coupling from the digital outputs to the analog inputs and degrade performance. All digital output traces to the receiver [such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC)] must be matched in length to avoid skew among outputs. • At each power-supply pin (AVDD, DVDD, or AVDDD3V), keep a 0.1-µF decoupling capacitor close to the device. A separate decoupling capacitor group consisting of a parallel combination of 10-µF, 1-µF, and 0.1-µF capacitors can be kept close to the supply source. 10.2 Layout Example Figure 147. ADS54J66EVM Layout Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 75 ADS54J66 SBAS745A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com 11 Device and Documentation Support 11.1 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 11.2 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 11.3 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 11.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 76 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS54J66 PACKAGE OPTION ADDENDUM www.ti.com 6-Dec-2015 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) ADS54J66IRMP ACTIVE VQFN RMP 72 168 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 AZ54J66 ADS54J66IRMPT ACTIVE VQFN RMP 72 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 AZ54J66 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 6-Dec-2015 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE OUTLINE RMP0072A VQFN - 0.9 mm max height SCALE 1.700 VQFN 10.1 9.9 B A PIN 1 ID 10.1 9.9 0.9 MAX 0.05 0.00 C 0.08 C (0.2) SEATING PLANE 4X (45 X0.42) 19 36 18 4X 8.5 37 SYMM 8.5 0.1 PIN 1 ID (R0.2) 1 68X 0.5 54 55 72 SYMM 72X 0.5 0.3 72X 0.30 0.18 0.1 0.05 C B C A 4221047/B 02/2014 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance. www.ti.com EXAMPLE BOARD LAYOUT RMP0072A VQFN - 0.9 mm max height VQFN ( 8.5) SYMM 72X (0.6) SEE DETAILS 55 72 1 54 72X (0.24) (0.25) TYP (9.8) SYMM (1.315) TYP 68X (0.5) ( 0.2) TYP VIA 37 18 19 36 (1.315) TYP (9.8) LAND PATTERN EXAMPLE SCALE:8X 0.07 MAX ALL AROUND 0.07 MIN ALL AROUND SOLDER MASK OPENING METAL SOLDER MASK OPENING NON SOLDER MASK DEFINED (PREFERRED) METAL SOLDER MASK DEFINED SOLDER MASK DETAILS 4221047/B 02/2014 NOTES: (continued) 4. This package is designed to be soldered to a thermal pad on the board. For more information, see QFN/SON PCB application report in literature No. SLUA271 (www.ti.com/lit/slua271). www.ti.com EXAMPLE STENCIL DESIGN RMP0072A VQFN - 0.9 mm max height VQFN (9.8) 72X (0.6) (1.315) TYP 72 55 1 54 72X (0.24) (1.315) TYP (0.25) TYP SYMM (1.315) TYP (9.8) 68X (0.5) METAL TYP 37 18 ( 0.2) TYP VIA 19 36 36X ( 1.115) (1.315) TYP SYMM SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL EXPOSED PAD 62% PRINTED SOLDER COVERAGE BY AREA SCALE:8X 4221047/B 02/2014 NOTES: (continued) 5. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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