CXA3106Q PLL IC for LCD Monitor/Projector Description The CXA3106Q is a PLL IC for LCD monitors/ projectors with built-in phase detector, charge pump, VCO and counter. The various internal settings are performed by serial data via a 3-line bus. Applicable LCD monitor/projector resolution are VGA, SVGA and XGA, etc. 48 pin QFP (Plastic) Functions • Phase detector enable • UNLOCK output • Output TTL disable function • Power save function (2 steps) TTLGND TTLVCC PECLVCC IOGND CLK/2L CLK/2H CLKL Applications • CRT displays • LCD projectors • LCD monitors • Multi-media CLKH DSYNCL DSYNCH VBB Pin Configuration (Top View) PECLVCC Features • Supply voltage: 5V ± 10% single power supply • Package: 48-pin QFP • Power consumption: 335mW • Sync input frequency: 10 to 100kHz • Clock output signal frequency: 10 to 120MHz • Clock delay: 1/16 to 20/16 CLK • Sync delay: 1/16 to 20/16 CLK • I/O level: TTL, PECL (complementary) • Low clock jitter • 1/2 clock output 36 35 34 33 32 31 30 29 28 27 26 25 24 DSYNC IOGND 37 23 CLK IOVCC 38 PLLVCC 39 22 CLKN PLLGND 40 21 CLK/2 VCOVCC 41 20 CLK/2N VCOGND 42 19 DGND 18 DVCC VCOHGND 43 IREF 44 17 UNLOCK RC2 45 16 DIVOUT RC1 46 15 SEROUT 14 CS IRGND 47 13 TLOAD VCOL VCO 8 9 10 11 12 SCLK VCOH 7 SDATA IOGND 6 SYNC 5 SENABLE 4 SYNCL 3 SYNCH 2 HOLD 1 IOVCC IRVCC 48 Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E97447A7X-PS CXA3106Q Absolute Maximum Ratings (Ta = 25°C) • Supply voltage • • • • • IOVCC, DVCC, TTLVCC, PECLVCC, PLLVCC, VCOVCC, IRVCC, –0.5 to +7.0 IOGND, DGND, TTLGND, VCOHGND, PLLGND, VCOGND, IRGND –0.5 to +0.5 Input voltage VCOH, VCOL, SYNCH, SYNCL, VCO, HOLD, SYNC, SENABLE, SCLK, SDATA, TLOAD, CS IOGND – 0.5 to IOVCC + 0.5 RC2 IRGND – 0.5 to IRVCC + 0.5 Output current SEROUT, DIVOUT, UNLOCK, CLK/2N, CLK/2, CLKN, CLK, DSYNC, CLK/2L, CLK/2H, CLKL, CLKH, DSYNCH, DSYNCL, VBB –30 to +30 IREF, RC1 –2 to +2 Storage temperature Tstg –65 to +150 Operating ambient temperature Ta –25 to +75 Allowable power dissipation 750 PD V V V V mA mA °C °C mW Recommended Operating Conditions IOVCC, DVCC, TTLVCC, PECLVCC, PLLVCC, VCOVCC, IRVCC IOGND, DGND, TTLGND, VCOHGND, PLLGND, VCOGND, IRGND • Digital input DIN (PECL) ∗1 H level DIN (PECL) ∗1 L level DIN (TTL) ∗2 H level DIN (TTL) ∗2 L level • SYNC, SYNCH, SYNCL input jitter • Operating temperature Ta Min. Typ. Max. 4.75 5.00 5.25 V –0.05 IOVCC – 1.1 0 0.05 V IOVCC – 1.5 0.8 1.0 V V V ns +75 °C • Supply voltage ∗1 VCOH, VCOL, SYNCH, SYNCL ∗2 VCO, HOLD, SYNC, SENABLE, SCLK, SDATA, TLOAD, CS –2– 2.0 –20 TTLIN PECLIN SYNC (TTL) SYNC (PECL) –3– IREF DAC TTLIN PECLIN VCO (PECL) HOLD (TTL) TTLIN VCO (TTL) Block Diagram SENABLE SCLK DIVOUT TTLOUT 1bit 12bit Programmable Counter on/off SEROUT VCO TLOAD TTLIN 1/256 to 1/4096 CLK 5bit Fine Delay 1/16 to 20/16 CLK RC2 2bit Charge Pump 1bit on/off read out TTLOUT Phase Detector 1bit SDATA CONTROL REGISTER 1bit Polarity RC1 1bit MUX logic Latch 1bit synthesizer power save 2bit DIV 2bit Coarse Delay 1 to 4 CLK CS whole chip power save 1/2 RSET 1bit Polarity 1bit 1bit 1bit 1bit 1bit PECL on/off 1bit unlock detect PECLOUT TTLOUT on/off TTLOUT on/off PECLOUT TTLOUT on/off TTLOUT on/off PECLOUT TTLOUT on/off VBB UNLOCK CLK/2 (PECL) NCLK/2 (TTL) CLK/2 (TTL) CLK (PECL) NCLK (TTL) CLK (TTL) DSYNC (PECL) DSYNC (TTL) CXA3106Q CXA3106Q Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Symbol IOVCC IOGND VCOH VCOL VCO HOLD SYNCH SYNCL SYNC SENABLE SCLK SDATA TLOAD CS SEROUT DIVOUT UNLOCK DVCC DGND CLK/2N CLK/2 CLKN CLK DSYNC TTLGND TTLVCC IOGND PECLVCC CLK/2L CLK/2H CLKL CLKH DSYNCL DSYNCH VBB PECLVCC IOGND IOVCC PLLVCC PLLGND VCOVCC VCOGND VCOHGND IREF RC2 RC1 IRGND IRVCC Description Digital power supply Digital GND External VCO input External inverted VCO input External VCO input Phase detector disable signal input Sync input Inverted sync input Sync input Control signal (enable) Control signal (clock) Control signal (data) Programmable counter test input Chip select Register read output Programmable counter test output Unlock signal output Digital power supply Digital GND Inverted 1/2 clock output 1/2 clock output Inverted clock output Clock output Delay sync signal output TTL output GND TTL output power supply Digital GND PECL output power supply Inverted 1/2 clock output 1/2 clock output Inverted clock output Clock output Delay sync signal output Inverted delay sync signal output PECL reference voltage PECL output power supply Digital GND Digital power supply PLL circuit analog power supply PLL circuit analog GND VCO circuit analog power supply VCO circuit analog GND VCO SUB analog GND Charge pump current preparation External pin for LPF External pin for LPF IREF analog GND IREF analog power supply –4– Reference voltage level 5V 0V PECL PECL TTL TTL PECL PECL TTL TTL TTL TTL TTL TTL TTL TTL TTL 5V 0V TTL TTL TTL TTL TTL 0V 5V 0V 5V PECL PECL PECL PECL PECL PECL PECLVCC – 1.3V 5V 0V 5V 5V 0V 5V 0V 0V 1.3V 2.0V to 4.4V 2.1V 0V 5V CXA3106Q Pin Description and I/O Pin Equivalent Circuit Pin No. Symbol I/O Reference voltage level Equivalent circuit Description 1 IOVCC — 5V Digital power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 2 IOGND — 0V Digital GND. 18 DVCC — 5V Digital power supply. 19 DGND — 0V Digital GND. 25 TTLGND — 0V TTL output GND. 26 TTLVCC — 5V TTL output power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 27 IOGND — 0V Digital GND. 5V PECL output power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 28 PECLVCC — 36 PECLVCC — 5V PECL output power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 37 IOGND — 0V Digital GND. 5V Digital power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 38 IOVCC — 39 PLLVCC — 5V PLL circuit analog power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 40 PLLGND — 0V PLL circuit analog GND. 41 VCOVCC — 5V VCO circuit analog power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 42 VCOGND — 0V VCO circuit analog GND. 43 VCOHGND — 0V VCO SUB analog GND. 47 IRGND — 0V IREF analog GND. 5V IREF analog power supply. Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 48 IRVCC — –5– CXA3106Q Pin No. 3 Symbol VCOH I/O I Reference voltage level Equivalent circuit PECL External VCO input. Programmable counter test input (switchable by a control register). When using the VCO PECL input, open the Pin 5 VCO TTL input. PECL External inverted VCO input. When open, this pin goes to the PECL threshold voltage (IOVcc – 1.3V). Only the pin 3 VCOH input with VCOL input open can be also operated but complementary input is recommended in order to realize stable high-speed operation. IOVCC 4 VCOL I r 7 SYNCH I Description 3 7 4 8 r Sync input. When using the SYNCH PECL input, open the Pin 9 SYNC TTL input. The sync signal can be switched between positive/negative polarity by an internal register. PECL IOGND 8 SYNCL I Inverted sync input. When open, this pin goes to the PECL threshold voltage (IOVcc – 1.3V). Only the Pin 7 SYNCH input with SYNCL input open can be also operated but complementary input is recommended in order to realize stable high-speed operation. PECL –6– CXA3106Q Pin No. 5 6 9 Symbol VCO HOLD SYNC I/O I I I Reference voltage level Equivalent circuit TTL External VCO input. Programmable counter test input (controlled by a control register). When using the VCO TTL input, open the Pin 3 VCOH and Pin 4 VCOL PECL inputs. TTL Phase detector disable signal. Active high. When this pin is high, the phase detector output is held. This pin goes to high level when open. (See the HOLD Timing Chart.) TTL IOVCC r/2 r 5 10 10 SENABLE I TTL 6 11 1.5V 2r 9 12 13 12 13 SCLK SDATA TLOAD I I I Sync input. When using the SYNC TTL input, open the Pin 7 SYNCH and Pin 8 SYNCL PECL inputs. The sync signal can be switched between positive/negative polarity by a control register. Control signal (enable) for setting the internal registers. When SENABLE is low, registers can be written; when high, registers can be read. (See the Control Register Table and Control Timing Chart.) TTL Control signal (clock) for setting the internal registers. When SENABLE is low, SDATA is loaded to the registers at the rising edge of SCLK. When SENABLE is high, the register contents are output from SEROUT at the falling edge of SCLK. (See the Control Register Table and Control Timing Chart.) TTL Control signal (data) for setting the internal registers. (See the Control Register Table and Control Timing Chart.) TTL Programmable counter test input. This pin is normally open status and high. Register contents can be loaded immediately to Programmable counter by setting TLOAD low during the programmable counter test mode. IOGND 11 Description –7– CXA3106Q Pin No. Symbol I/O Reference voltage level Equivalent circuit Description IOVCC 14 CS I Chip select. When low, all circuits including the register circuit are set to the power save mode. When high, all circuits are set to operating mode. TTL 14 IOGND 15 16 SEROUT DIVOUT O O TTL Register read output. When SENABLE is high, the register contents are output from SEROUT at the falling edge of SCLK. (See the Control Register Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. TTL Programmable counter test output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. IOVCC 20 CLK/2N O TTLVCC TTL 100k 15 22 16 23 20 24 21 CLK/2 O TTL 21 TTLGND IOGND 22 23 24 CLKN CLK DSYNC O O O Inverted 1/2 clock output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. 1/2 clock output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. TTL Inverted clock output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. TTL Clock output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. TTL Delay sync signal output. (See the I/O Timing Chart.) TTL output can be turned ON/OFF (high impedance) and switched between positive/negative polarity by a control register. –8– CXA3106Q Pin No. Symbol I/O Reference voltage level Equivalent circuit Description TTLVCC 17 UNLOCK O TTL 17 TTLGND IOGND 29 30 CLK/2L CLK/2H O O PECL Inverted 1/2 clock output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. PECL 1/2 clock output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. PECL Inverted clock output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. PECLVCC IOVCC 31 CLKL O 30 32 34 29 31 33 32 33 34 CLKH DSYNCL DSYNCH O O O Unlock signal output. This pin is an open collector output, and pulls in the current when a phase difference occurs. The UNLOCK sensitivity can be adjusted by connecting a capacitor and resistors to this output as appropriate. (See the UNLOCK Timing Chart.) TTL output can be turned ON/OFF (high impedance) by a control register. PECL IOGND Clock output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. PECL Delay sync signal output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. PECL Inverted delay sync signal output. (See the I/O Timing Chart.) This pin requires an external pulldown resistor. When not used, connect to PECLVCC without connecting a pull-down resistor. –9– CXA3106Q Pin No. Symbol I/O Reference voltage level Equivalent circuit Description PECLVCC 35 VBB O PECLVCC –1.3V 35 PECL reference voltage. When used, ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. IOGND IRVCC 44 IREF O Charge pump current preparation. Connect to GND via an external resistor (1.6kΩ). Ground this pin to the ground pattern with a 0.1µF ceramic chip capacitor as close to the pin as possible. 1.3V 44 IRGND IOGND 45 RC2 O 2.0V to 4.4V IRVCC VCOVCC 46 45 External pin for LPF. See the Recommended Operating Circuit for the external circuits. Note that external resistors and capacitors should be metal film resistors and temperature compensation capacitors which are relatively unaffected by temperature change. VCOGND IRGND 46 RC1 O 100 2.1V – 10 – IOGND External pin for LPF. See the Recommended Operating Circuit for the external circuits. – 11 – Register 7 Register 6 Register 5 Register 4 Register 3 Register 2 Register 1 Register No. 30 21 34 27 FINE DELAY Bit 2 24 TESTPOWREG register read no TTLPOLREG UNLOCK Enable DSYNC Enable NCLK/2 Enable CLK/2 Enable DIVOUT Enable 38 NCLK Enable Read out power 39 CLK Enable 35 33 FINE DELAY Bit 3 23 register read no 32 FINE DELAY Bit 4 22 PD POL 31 COARSE COARSE DELAY DELAY Bit 0 Bit 1 20 DIV 1, 2, 4 DIV 1, 2, 4 Bit 0 Bit 1 CPREG register read no DELAYREG register read no CENFREREG Synth power 40 DSYNC POL 36 C.Pump Bit 1 28 FINE DELAY Bit 1 25 18 16 register read no 17 VCO DIV Bit 9 VCO DIV Bit 10 VCO DIV Bit 11 VCO DIV Bit 1 7 DATA1 DIVREG2 VCO DIV Bit 2 6 DATA2 11 VCO DIV Bit 3 5 DATA3 10 15 VCO DIV Bit 4 VCO DIV Bit 5 14 4 DATA4 3 DATA5 DATA 9 register read no 13 VCO DIV Bit 6 VCO DIV Bit 7 DIVREG1 2 1 register read no DAT6 DATA7 MSB Register Name Control Register Table VCO By-pass 41 SYNC POL 37 C.Pump Bit 0 29 FINE DELAY Bit 0 26 19 VCO DIV Bit 8 12 VCO DIV Bit 0 8 DATA0 1 1 1 1 0 0 0 ADDR2 MSB 1 1 0 0 1 1 0 ADDR1 ADDRESS 1 0 1 0 1 0 1 ADDR0 LSB CXA3106Q CXA3106Q Electrical Characteristics Item (Ta = 25°C, VCC = 5V, GND = 0V) Symbol Conditions Min. Typ. Max. Unit Current consumption (excluding output current) Current consumption 1 ICC1 CS = H, Synth Power = 1 40 67 100 mA Current consumption 2 ICC2 CS = H, Synth Power = 0 5 15 30 mA Current consumption 3 ICC3 CS = L 3 10 20 mA Digital input Digital high level input voltage (PECL) VIH1 Digital low level input voltage (PECL) VIL1 VCOL, SYNCL input open voltage (PECL) VIO Digital high level input current (PECL) IIH1 VIH = IOVCC – 0.8V –100 100 µA Digital low level input current (PECL) IIL1 VIL = IOVCC – 1.6V –200 0 µA Digital high level input voltage (TTL) VIH2 Digital low level input voltage (TTL) VIL2 Digital high level input current (TTL) IIH2 VIH = 2.7V Digital low level input current (TTL) IIL2 VIL = 0.5V IOVCC –1.15 V IOVCC –1.5 IOVCC –1.3 V V 2.0 V 0.8 V –200 –20 µA –500 –100 µA 1.00 nA HOLD characteristics RC1 input pin leak current Ileak HOLD signal set-up time Ths 20 ns HOLD signal hold time Thh 20 ns Digital output Digital high level output voltage (PECL) VOH1 RL = 330Ω Digital low level output voltage (PECL) VOL1 RL = 330Ω PECL output reference voltage VBB RL = 330Ω Digital high level output voltage (TTL) VOH2 CL = 10pF Digital low level output voltage (TTL) VOL2 CL = 10pF – 12 – PECLVCC –1.1 PECLVCC –1.6 PECLVCC –1.3 V V 2.7 V 0.5 V CXA3106Q Item Symbol Conditions Min. Typ. Max. Unit UNLOCK output UNLOCK output current Iunlock mA –30 SYNC input SYNC input frequency range Fin 100 10 kHz DSYNC output DSYNC output variable coarse delay time setting resolution Rdsync1 DSYNC output variable coarse delay time Td1 DSYNC output variable fine delay time setting resolution Rdsync2 DSYNC output variable fine delay time Td2 bit 2 4 1 CLK bit 5 1/16 20/16 CLK VCO characteristics DIV output frequency operation range 1 FVCO1 DIV = 1/1 40 120 MHz DIV output frequency operation range 2 FVCO2 DIV = 1/2 20 60 MHz DIV output frequency operation range 3 FVCO3 DIV = 1/4 10 30 MHz VCO lock range Vlock 2.0 4.4 V VCO gain 1 KVCO1 DIV = 1/1 200 320 550 Mrad/sv VCO gain 2 KVCO2 DIV = 1/2 100 160 270 Mrad/sv VCO gain 3 KVCO3 DIV = 1/4 50 80 135 Mrad/sv Charge pump current 1 Kpd1 C.Pump Bit = 00, IREF = 1.6kΩ 80 100 130 µA Charge pump current 2 Kpd2 C.Pump Bit = 10, IREF = 1.6kΩ 350 400 500 µA Charge pump current 3 Kpd3 C.Pump Bit = 11, IREF = 1.6kΩ 1350 1600 1800 µA VCO counter bits Rdiv2 12 – 13 – bit CXA3106Q Item Symbol Conditions Min. Typ. Max. Unit CLK (CLK, CLK/2) output CLK output (PECL) frequency range 1 Fclk1PECL DIV = 1/1 40 120 MHz CLK output (PECL) frequency range 2 Fclk2PECL DIV = 1/2 20 60 MHz CLK output (PECL) frequency range 3 Fclk3PECL DIV = 1/4 10 30 MHz CLK, CLK/2 output (PECL) TrPECL rise time 10% to 90%, RL = 330Ω 1.0 1.5 2.0 ns CLK, CLK/2 output (PECL) TfPECL fall time 10% to 90%, RL = 330Ω 1.0 1.5 2.0 ns CLK output (TTL) frequency range 1 Fclk1TTL DIV = 1/1 40 80 MHz CLK output (TTL) frequency range 2 Fclk2TTL DIV = 1/2 20 60 MHz CLK output (TTL) frequency range 3 Fclk3TTL DIV = 1/4 10 30 MHz CLK, CLK/2 output (TTL) rise time TrTTL 10% to 90%, CL = 10pF 2.0 3.0 4.0 ns CLK, CLK/2 output (TTL) fall time TfTTL 10% to 90%, CL = 10pF 2.0 3.0 4.0 ns CLK output (PECL, TTL) duty Dclk2 CL = 10pF 40 50 60 % SYNC input (PECL) and CLK output (PECL) delay offset Td3 CL = 10pF CLK output (PECL) and DSYNC output (PECL) phase difference Td4 CL = 10pF 1.5 2.4 3.0 ns CLK output (PECL) and CLK/2 output (PECL) phase difference Td5 CL = 10pF 0.0 0.8 1.0 ns CLK output (PECL) and DIVOUT output (TTL) rise phase difference Td6 CL = 10pF 14 ns CLK output (PECL) and DIVOUT output (TTL) fall phase difference Td7 CL = 10pF 11 ns DSYNC, CLK, CLK/2 PECL output and TTL output Td8 phase difference CL = 10pF – 14 – 1 1.5 3.0 ns 4.5 ns CXA3106Q Item Symbol Conditions Min. Typ. Max. Unit Tj1p-p triggered at SYNC Fsync = 15.73kHz (Crystal) Fclk = 12.27MHz N = 780 Fine Delay = 2/16 to 20/16 4.0 7.0 ns Tj2p-p triggered at SYNC Fsync = 31.47kHz (Crystal) Fclk = 25.18MHz N = 800 3.0 5.0 ns Tj3p-p triggered at SYNC Fsync = 48.08kHz (Crystal) Fclk = 50.00MHz N = 1040 2.0 3.0 ns Tj4p-p triggered at SYNC Fsync = 56.48kHz (Crystal) Fclk = 75.00MHz N = 1328 1.6 2.5 ns triggered at DSYNC 0.1 ns 12 MHz CLK (CLK, CLK/2) output CLK vs. SYNC output jitter (NTSC) CLK vs. SYNC output jitter (VGA) CLK vs. SYNC output jitter (SVGA) CLK vs. SYNC output jitter (XGA) CLK vs. DSYNC output jitter Tj5p-p Control registers SCLK frequency SCLK in write/read mode SENABLE setup time TENS in write mode 3 ns SENABLE hold time TENH in write mode 0 ns SDATA setup time TDS in write mode 3 ns SDATA hold time TDH in read mode 0 ns SENABLE setup time TNENS in read mode 3 ns SENABLE hold time TNENH in read mode 0 ns – 15 – CXA3106Q Description of Block Diagram Sync Input Sync signals in the range of 10 to 100kHz can be input. Input supports both positive and negative polarity. PECL input can also be a single input. When SYNC is positive polarity, the clock is regenerated in synchronization with the rising edge of the sync signal. When SYNC is negative polarity, the clock is regenerated in synchronization with the falling edge of the sync signal. VCO oscillation stops when there is no sync input. Register: SYNC POL 1 0 SYNC input polarity Positive Negative Phase Detector The phase detector operates at the sync input frequency of 10 to 100kHz. The PD input polarity should be set to the default PD POL = 1. Phase comparison is performed at the edges. The input circuit of the phase detector does not contain a hysteresis circuit, so the waveform must be shaped at the front end of the CXA3106Q when inputting a noisy signal. The phase detector HOLD signal is supplied by TTL. (See the HOLD Timing Chart.) The PLL UNLOCK signal is output by an open collector. (See the UNLOCK Timing Chart.) Charge Pump The gain (I, I/4, I/16) can be varied by changing the charge pump current using 2 bits of control register. Register: C.Pump bit 1 0 1 1 Register: C.Pump bit 0 0 0 1 Charge pump current 100µA 400µA 1600µA LPF This is a loop filter comprised of the external capacitors and resistor. Be sure to use metal film resistors with little temperature variation and a temperature-compensated capacitor. In particular, the 0.33µF capacitor should be equivalent to Murata's high dielectric constant series capacitor type B or better. (electrostatic capacitance change ratio ±10%: T = –25 to +85°C) VCO The VCO oscillator frequency covers from 40 to 120MHz. VCO Rear-end Counter The VCO output is frequency divided to 1/1, 1/2 or 1/4 by switching 2 bits of control register. The operating range can be expanded to 10 to 120MHz by combining the counter with a VCO frequency divider. Register: DIV 1, 2, 4 bit 1 0 1 1 Register: DIV 1, 2, 4 bit 0 0 0 1 Counter frequency divisions 1/1 1/2 1/4 – 16 – CXA3106Q Feedback Programmable Counter This counter can be set as desired from 256 to 4096 using 12 bits. Frequency divisions = (m + 1) × 8 + n, n: 3 bits (VCO DIV bits 0 to 2), m: 9 bits (VCO DIV bits 3 to 11) When the register value is changed, the new setting is actually loaded to the counter when the counter value becomes "all 0". Clock Output When SYNC input is positive polarity, the clock is regenerated in synchronization with the rising edge of the sync signal. The clock output delay time can be changed in the range of 1/16 to 20/16 CLK using 5 bits of control register. (See the I/O Timing Chart.) Output is TTL and PECL (complementary), and supports both positive and negative polarity. Clock TTL output can also be turned off independently. Register: Clock Enable 1 0 Clock output status ON OFF 1/2 Clock Output Reset is performed at the delay sync timing and the clock output is frequency divided by 1/2. (See the I/O Timing Chart.) Both odd and even output are TTL and PECL output. TTL output can also be turned off independently. Register: Clock Enable 1 0 Clock output status ON OFF Delay Sync Output The front edge of the delay sync pulse is latched by the pulse obtained by frequency dividing the CLK regenerated by the PLL, so there is almost no jitter with respect to CLK. This front edge can be used as the reset signal for the system timing circuit. The rear edge of the delay sync pulse is latched by the CLK regenerated by the PLL. This relationship is undefined for one clock as shown in the Timing Chart. The delay sync output delay time can be varied in two stages. First, the delay time can be varied in the range of 1/16 to 20/16 CLK using 5 bits of control register, and then in the range of 1 to 4 CLK using 2 bits of control register. In other words, the total delay time is ((1/16 to 20/16) + (1 to 4)) CLK. (See the I/O Timing Chart.) DSYNC output is TTL and PECL (complementary), and supports both positive and negative polarity. Clock TTL output can also be turned off. Register: Clock Enable 1 0 Clock output status ON OFF Lower delay line FINE DELAY bits 0 to 4 00000 00001 · · · · · · · · · · · · 10011 Delay time 1/16CLK 2/16CLK · · · · · · · · · · · · 20/16CLK Upper delay line COARSE DELAY bits 0 to 1 00 01 10 11 Delay time 1CLK 2CLK 3CLK 4CLK Register: DSYNC POL 1 0 DSYNC output polarity Positive Negative – 17 – CXA3106Q Control Circuit (3-bit address, 8-bit data) The timing and input methods are described hereafter. Feedback programmable counter control VCO rear-end counter control Fine delay line control Coarse delay line control Charge pump current DAC control Phase detector input positive/negative polarity control Sync input positive/negative polarity control Delay sync output positive/negative polarity control Clock TTL output OFF function Inverted clock TTL output OFF function 1/2 clock TTL output OFF function Inverted 1/2 clock TTL output OFF function Delay sync TTL output OFF function UNLOCK output OFF function Programmable counter input switching Power save with register contents held Register read function power ON/OFF Programmable counter TTL output OFF function REGISTER1, 2 REGISTER3 REGISTER4 REGISTER4 REGISTER5 REGISTER5 REGISTER6 REGISTER6 REGISTER6 REGISTER6 REGISTER6 REGISTER6 REGISTER6 REGISTER6 REGISTER7 REGISTER7 REGISTER7 REGISTER7 12bit 2bit 5bit 2bit 2bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit 1bit Power Save The CXA3106Q realizes 2-step power saving (all OFF, control registers only ON). This is controlled by a control register and the chip selector. Step 1: Chip selector control CS H L Power save status Power ON All OFF Step 2: Control register control Register: Synth power 1 0 Power save status Power ON Control registers only ON Readout Circuit (during test mode) The control register contents can be read by serial data from SEROUT. (See the Control Register Timing Chart.) Register: Read out power Readout status 0 1 Function OFF Function ON – 18 – CXA3106Q Programmable Counter Output (during test mode) The programmable counter output is TTL output from the DIVOUT pin. (See the I/O Timing Chart.) This output is normally not used. Register: DIVOUT Enable 0 1 DIVOUT output status OFF ON TLOAD input (during test mode) This control signal forcibly loads the control register contents to the programmable counter. This signal is normally not used. TLOAD H L Forced load control status Function OFF Function ON VCO input (during test mode) This is the programmable counter test signal input pin. This pin can be switched internally by the MUX circuit. TTL and PECL input are possible. This pin is normally not used. Register: VCO By-pass Input status 1 0 Internal VCO External input – 19 – CXA3106Q Control Register Timing 1) Write mode Many CXA3106Q functions can be controlled via a program. Characteristics are changed by setting the internal control register values via a serial interface comprised of three pins: SENABLE (Pin 10), SCLK (Pin 11) and SDATA (Pin 12). The write timing diagram is shown below. Input the 8-bit data and 3-bit register address MSB first to the SDATA pin. Some registers are not 8 bits, but the data is input aligned with the LSB side in these cases. (See the Register Table.) SENABLE is the enable signal and is active low. SCLK is the transfer clock signal, and data is loaded to the IC at the rising edge. When SENABLE rises, SCLK must be high. (Registers are set at the rising edge of SENABLE.) When SENABLE falls, SCLK may be either high or low. SENABLE 8bit DATA SDATA 3bit ADDRESS SCLK Enlarged Enlarged TENS TENH SENABLE SDATA SCLK TDS TDH For example, when inputting a 16-bit signal, the initial 5 bits are invalid and the latter 11 bits are valid. This is to say that the latter 11 bits are loaded to the register. SENABLE SDATA 5bit Invalid DATA 8bit DATA SCLK – 20 – 3bit address CXA3106Q The settings of the frequency divider (2 bits, DIV1, 2, 4) and programmable counter (12 bits, VCODIV) at the rear end of the VCO are transferred in the order shown below. (The data will be set when the three registers are transferred.) First DIVREG2, CENFREREG and DIVREG1 are set, and then the data is transferred independently at the timings shown below. DIVREG2 (upper 4 bits of VCODIV) ↓ CENFREREG (2 bits of DIV1, 2, 4) ↓ DIVREG1 (lower 8 bits of VCODIV) All three of the above registers must be changed even when changing only (2 bits of DIV1, 2, 4). This is the same when changing only (12 bits of VCODIV). SENABLE SDATA SCLK DIVREG2 CENFREREG – 21 – DIVREG1 CXA3106Q 2) Read mode Data can be transferred from the shift register to the data register only when SENABLE is high. Binary data can be read from the data register by inputting SCLK when SENABLE is high. Data is loaded from the data register to the SCAN PATH circuit each time one clock is input to SCLK, and is output sequentially from the register read no. 1 data (VCODIV bit 7) through the SEROUT pin. When the 41st SCLK clock pulse is input, the register read no. 41 data (VCO By-pass) is output. Then, when the 42nd clock pulse is input to SCLK, the output returns to the register read no. 1 data (VCODIV bit 7) and the data output is repeated. Also, the data output from the SCAN PATH circuit is automatically reloaded even when the shift register data is changed during data output. Note) Since all registers do not have 8 bits, only the valid bits of each register are loaded to the SCAN PATH circuit. (See the Control Register Table for the actual register read no.) SCLK CLK I/P SHIFT REGISTER, 11 BITS NEN SENABLE 8 BIT DATA 3 BIT ADDRESS 7 DATA REGISTERS (41 LATCHES). REGISTERS ARE DIFFERENT LENGTHS UP TO 8 BIT TR EN CLK SEROUT SCAN PATH, 1 ELEMENT PER REGISTER BIT Block Diagram during Read Mode TNENS TNENH SENA READ NO. 1 SEROUT SCLK 1 READ NO. 2 2 Timing Chart during Read Mode – 22 – READ NO. N N Td3 (typ. 1ns) 0 1CLK – 23 – CLK/2 output (PECL) RESET (internal signal) DSYNC output (positive polarity) (PECL) DIVOUT output (TTL) 1 Td1 (1 to 4) CLK Td6 (typ. 14ns) 1/16CLK to 20/16CLK Td2 CLK output (PECL) SYNC input (positive polarity) (PECL) Timing Charts 1. I/O timing 2 1CLK Td4 (typ. 2.4ns) 3 Td5 (typ. 0.8ns) 8CLK 4CLK Td7 (typ. 11ns) CXA3106Q CXA3106Q 2. HOLD timing SYNC input (SYNC POL = 1) SYNC input (SYNC POL = 0) DIVOUT output (TTL) Thh Ths Thh HOLD input (TTL) Ths Thold AAAAA AA The phase comparison output is held and fixed VCO output frequency is output. CLK output HOLD signal set-up time (Ths) is a time from the rising edge of HOLD signal to the falling edge of DIVOUT. Or, when SYNC POL = 1, it is a time from the falling edge of HOLD signal to the rising edge of SYNC; when SYNC POL = 0, it is the time from the falling edge of HOLD signal to the falling edge of SYNC. HOLD signal hold time (Thh) is the time from the falling edge of DIVOUT to falling edge of HOLD signal. Or, when SYNC POL = 1, it is the time from the rising edge of SYNC to the rising edge of HOLD signal; when SYNC POL = 0, it is the time from the falling edge of SYNC to the rising edge of HOLD signal. When the HOLD input is held, the CLK frequency fluctuation can be calculated as follows. I SW +Q ∆V –Q C Ileak VCO ∆f SW I C · ∆V = Q = Ileak · Thold C: ∆V: Ileak: Thold: Loop filter capacitance Voltage variation due to leak current Internal amplifier leak current Hold time ∆V = Ileak · Thold/C ∆f = ∆V · KVCO = Ileak · Thold/C · KVCO For example, assuming f = 100MHz, Ileak = 1nA, Thold = 1ms, C = 0.33µF, and KVCO = 2π · 50MHz/V, then: ∆V = 1 × 10–9 · 1 × 10–3/(0.33 × 10–6) = 3 × 10–6 [V] ∆f = 1 × 10–9 · 1 × 10–3/(0.33 × 10–6) · 50 × 106 = 151 [Hz] – 24 – CXA3106Q 3. UNLOCK timing Inside the IC Outside the IC VCC I2 R2 R1 Signal from phase comparator unlock detect S1 I1 UNLOCK S2 C The unlock detect output is an open collector. When unlock detect output S1 goes high, the current I1 is pulled in. The UNLOCK sensitivity can be adjusted by connecting external resistors (R1, R2) and a capacitor (C) to this output pin as appropriate and changing these values. Operation during three modes is described below. CASE 1: When there is no phase difference, that is to say, when the PLL is locked. The S1 signal is low and the S2 signal is high. The UNLOCK output remains low. S1 S2 threshold level UNLOCK CASE 2: When there is a phase difference, that is to say, when the S1 signal goes high and low as shown in the figure below, the fall slew rate of the S2 signal is determined by the current I1 flowing into that open collector. Therefore, increasing the resistance R1 causes the S2 signal fall slew rate to become slower. Also, since the S2 signal rise slew rate is determined by the current I2, reducing the resistance R2 causes the S2 signal rise slew rate to become faster. If this integrated S2 signal does not fall below the threshold level of the next inverter, the UNLOCK signal stays low, and the PLL is said to be locked. S1 S2 threshold level UNLOCK CASE 3: However, even if a phase difference exists as shown above, if the resistance R1 is reduced, the current I1 flowing into the open collector increases, and the S2 signal fall slew rate becomes faster. Also, if the resistance R2 is increased, the S2 signal rise slew rate becomes slower. If this integrated S2 signal falls below the threshold level of the next inverter, the UNLOCK signal goes from low to high, and the PLL is said to be unlocked. S1 threshold level S2 UNLOCK – 25 – CXA3106Q Charge Pump and Loop Filter Settings The CXA3106Q's charge pump is a constant-current output type as shown below. When a constant-current output charge pump circuit is used inside the PLL, the phase detector output acts as a current source, and the dimension of its transmittance KPD is A/rad. Also, when considering the VCO input as a voltage, the LPF transmittance dimension must be expressed in ohms (Ω = V/A). Therefore, the PLL transmittance when a constant-current output charge pump circuit is used is as follows. VCC S1 To LPF S2 ωr 1/S θr + PD LPF VCO KPD (A/rad) F (S) (Ω) KVCO (rad/S/V) – θo N 1/S counter ω0/N 1/N The PLL closed loop transmittance is obtained by the following formula. θo/N θr = KPD · F (S) · KVCO · 1/N · 1/S ... (1) 1 + KPD · F (S) · KVCO · 1/N · 1/S Here, KPD, F (S), and KVCO are: KPD: Phase comparator gain F (S): Loop filter transmittance KVCO: VCO gain (A/rad) (Ω) (rad/s/V) ∗1 The reason for the 1/S inside the phase detector is as follows. t θo (t)/N = ∫ o ω0 (t)/Ndt + θo (t = 0)/N ... (a) θo (t = 0) = 0 t θo (t)/N = ∫ o ω0 (t)/Ndt ... (b) Performing Laplace conversion: θo (S)/N = 1 W0 (S)/N ... (c) S – 26 – ω0/N CXA3106Q The loop filter F (S) is described below. The loop filter smoothes the output pulse from the phase comparator and inputs it as the DC component to the VCO. In addition to this, however, the loop filter also plays an important element in determining the PLL response characteristics. Typical examples of loop filters include lag filters, lag-lead filters, active filters, etc. However, the CXA3106Q's LPF is a current input type active filter as shown below, so the following calculations show an actual example of deriving the PLL closed loop transmittance when using this type of filter and then using this transmittance to create a formula for setting the filter constants. Current input type active filter C R ii –A –1 Vo –Vo The Bode diagram for formula (2) is as follows. F (S) = = gain [dB] VO 1 + VO = (R + ) A SC 1 + SRC A · SC 1+A log scale The filter transmittance is as follows. 1 τ log w 1 + Sτ A · SC 1+A ∴τ = RC log w phase [deg] 0 Here, assuming A > 1, then: F (S) = 1 + Sτ ........................... (2) SC –45deg –90 Next, substituting (2) into (1) and obtaining the overall closed loop transmittance for the PLL: θo/N θr KPD · KVCO · τ NC = KPD · KVCO · τ NC S2 + = ωn = ζ= S2 √ ·S+ 2ζωnS + ωn2 + 2ζωnS + ωn2 KPD · KVCO NC ... (3) KPD · KVCO ·S+ NC ............................................ (4) KPD · KVCO ...................................................... (5) NC 1 2 ωnτ ................................................................. (6) – 27 – CXA3106Q Here, ωn and ζ are as follows. ωn characteristic angular frequency: The oscillatory angular frequency when PLL oscillation is assumed to have been maintained by the loop filter and individual loop gains is called the characteristic angular frequency: ωn. ζ damping factor: This is the PLL transient response characteristic, and serves as a measure of the PLL stability. It is determined by the loop gain and the loop filter. A capacitor C2 is added to the actual loop filter. This added capacitor C2 is used to reduce the R noise, and a value of about 1/10 to 1/1000 of C1 should be selected as necessary. Current input type active filter with added capacitor C2 C2 C1 R ii –1 –A Vo –Vo = 1 + C1 · R · S S ((C1 + C2) + C1 · C2 · R · S) gain [dB] F (S) = The Bode diagram for formula (7) is as follows. 1 + τ1 · S .................. (7) S (C1 + C2) (1 + τ2 · S) log scale The filter transmittance is as follows. 1 τ1 τ1 = C1 · R τ2 = log w C1 · C2 · R C1 + C2 log w phase [deg] 0 Here, assuming C2 = C1/100, then: τ2 = C1 · C1/100 · R C1 + C1/100 = 1 C1 · R 101 = 1 τ1 101 –45deg –90 – 28 – 1 τ2 CXA3106Q Next, the various parameters inside an actual CXA3106Q are obtained. The CXA3106Q's charge pump output block and the LPF circuit are as follows. C2 R1 C1 46 45 CXA3106Q VCC 100k 100µA or 400µA or 1600µA To VCO S1 100µA or 400µA or 1600µA S2 20k 100 First, KPD is as follows. KPD = 100µ/2π or 400µ/2π or 1600µ/2 π (A/rad) VCO frequency [MHz] Typical KVCO characteristics curves for the CXA3106Q's internal VCO are as follows. VCO DIV = 1/1 120 VCO DIV = 1/2 80 VCO DIV = 1/4 40 2 3 VCO input voltage [V] Therefore, KVCO is as follows. KVCO = 2π · 50M or 2π · 25M or 2π · 12.5M (rad/s/V) – 29 – 4 CXA3106Q ωn and ζ calculated for various types of computer signals are shown below. Here, the various parameters are as follows. FSYNC: Input H sync frequency FCLK: Output clock frequency KPD∗2π: Phase comparator gain ∗2π (KPD*2π = +100 or 400 or 1600) KVCO/2π: VCO gain (when VCO DIV = 1/1, KVCO/2π = 50) (when VCO DIV = 1/2, KVCO/2π = 50/2) (when VCO DIV = 1/4, KVCO/2π = 50/4) N: Counter value C1: Loop filter capacitance value R1: Loop filter resistance value KPD C.Pump N DIV1.2.4 C1 Resolution FSYNC FCLK ∗ KVCO/2π 2π setting setting setting µF MHz µA Bit1 Bit0 M/(S∗V) Bit1 Bit0 kHz R1 Ω ωn fn ζ kHzrad kHz NTSC 15.734 12.27 400 1 0 50/4 1 1 780 0.33 3300 4.41 0.70 2.40 NTSC 15.734 18.41 400 1 0 50/4 1 1 1170 0.33 3300 3.60 0.57 1.96 NTSC 15.734 24.55 400 1 0 50/2 1 0 1560 0.33 3300 4.41 0.70 2.40 PAL 15.625 14.69 400 1 0 50/4 1 1 940 0.33 3300 4.01 0.64 2.19 PAL 15.625 22.03 400 1 0 50/4 1 1 1410 0.33 3300 3.28 0.52 1.78 PAL 15.625 29.38 400 1 0 50/2 1 0 1880 0.33 3300 4.01 0.64 2.19 PC-98 640 × 480 24.82 21.05 100 0 0 50/2 1 0 848 0.33 3300 2.99 0.48 1.63 640 × 480 31.47 25.18 100 0 0 50/2 1 0 800 0.33 3300 3.08 0.49 1.68 MAC 640 × 480 35.00 30.24 400 1 0 50/2 1 0 864 0.33 3300 5.92 0.94 3.22 VESA 640 × 480 37.86 31.50 400 1 0 50/2 1 0 832 0.33 3300 6.04 0.96 3.29 SVGA 800 × 600 35.16 36.00 400 1 0 50/2 1 0 1024 0.33 3300 5.44 0.87 2.96 SVGA 800 × 600 37.88 40.00 400 1 0 50/2 1 0 1056 0.33 3300 5.36 0.85 2.92 SVGA 800 × 600 46.88 49.50 400 1 0 50/2 1 0 1056 0.33 3300 5.36 0.85 2.92 SVGA 800 × 600 48.08 50.00 400 1 0 50/2 1 0 1040 0.33 3300 5.40 0.86 2.94 SVGA 800 × 600 53.67 56.25 400 1 0 50/2 1 0 1048 0.33 3300 5.38 0.86 2.93 MAC 832 × 624 49.72 57.28 400 1 0 50/2 1 0 1152 0.33 3300 5.13 0.82 2.79 XGA 1024 × 768 48.36 65.00 400 1 0 50/1 0 0 1344 0.33 3300 6.72 1.07 3.66 XGA 1024 × 768 56.48 75.00 400 1 0 50/1 0 0 1328 0.33 3300 6.76 1.08 3.68 XGA 1024 × 768 60.02 78.75 400 1 0 50/1 0 0 1312 0.33 3300 6.80 1.08 3.70 MAC 1024 × 768 60.24 80.00 400 1 0 50/1 0 0 1328 0.33 3300 6.76 1.08 3.68 XGA 1024 × 768 68.68 94.50 400 1 0 50/1 0 0 1376 0.33 3300 6.64 1.06 3.61 VGA – 30 – CXA3106Q CLK Jitter Evaluation Method The regenerated CLK is obtained by applying Hsync to the CXA3106Q. Apply this CLK to a digital oscilloscope and observe the CLK waveform using Hsync as the trigger. triger Hsync Pulse Generator CXA3106Q CLK ch1 H Back Sync Porch Digital Oscilloscope Active Video Front Porch Computer signal 15 to 25% of Tsync Hsync Tsync = 1/fsync CLK Enlarged Enlarged Enlarged Enlarged Trigger CLK Tjp-p The CLK jitter is measured at peak to peak in the long-term write mode of the digital oscilloscope as shown in the figure. The CLK jitter size varies according to the difference in the relative position with respect to Hsync. Therefore, when the observation point is changed, the CLK jitter at that point is observed. Jitter amount [Tjp-p] The figure below shows an typical example of the CLK jitter for the CXA3106Q. The CLK jitter increases slightly at the rising edge of Hsync (in the case of positive polarity), and then settles down thereafter. However, this is not a problem as the active pixels start after about 20% of the H cycle has passed from the rising edge of Hsync. 0 1/4 · Tsync 2/4 · Tsync Observation points – 31 – 3/4 · Tsync Tsync CXA3106Q Example of Representative Characteristics KVCO characteristics KVCO characteristics 200 Ta = –25°C Ta = +25°C Ta = +75°C 150 Output Frequency [MHz] CLKIH Output Frequency [MHz] 200 DIV = 1/1 100 DIV = 1/2 50 150 100 50 DIV = 1/4 0 2.0 2.5 3.0 3.5 4.0 Vrc2 Control Voltage [V] 0 2.0 4.5 2.5 Coarse Delay Td1 vs. Coarse Delay Bit 4.5 Fine Delay Td2 vs. Fine Delay Bit 5 25 Fine Delay Td2 [1/16 CLK] Ta = –25°C Ta = +25°C Ta = +75°C 4 3 2 Ta = –25°C Ta = +25°C Ta = +75°C 20 15 10 5 1 0 0 1 2 Coarse Delay Bit 3 0 5 Jitter peak-peak vs. Output Frequency 3.5 VGA, N = 800, DIV = 1/2, CP = 10 SVGA, N = 1056, DIV = 1/2, CP = 10 XGA, N = 1344, DIV = 1/1, CP = 10 3.0 Jitter peak-peak [ns] Coarse Delay Td1 [CLK] 3.0 3.5 4.0 Vrc2 Control Voltage [V] VGA 2.5 SVGA 2.0 XGA 1.5 1.0 20 30 50 70 40 60 Output Frequency [MHz] – 32 – 80 90 10 Fine Delay Bit 15 20 CXA3106Q Notes on Operation • Be sure not to separate the analog and digital power supplies, and the analog and digital GND. • The ground pattern should be as wide as possible. Using a multi-layer substrate with a mat ground is recommended. • Ground the power supply pins of the IC with a 0.1µF or larger ceramic chip capacitor as close to each pin as possible. • Be sure to accurately match the I/O characteristic impedance in order to ensure sufficient performance during high-speed operation. • Design the set so that the loop filter (external) is located at the minimum distance. (See the CXA3106Q PWB.) – 33 – CXA3106Q (1) Recommended PECL I/O circuit The peripheral circuits mainly use PECL for digital input and output. Of course, PECL and TTL can also be mixed. In this case, disable the TTL outputs with the control registers. PECL level output pins 330Ω 33 32 31 30 29 28 27 DSYNCL CLKH CLKL CLK/2H CLK/2L PECLVCC IOGND 26 TTLVCC 34 25 TTLGND 35 DSYNCH 37 IOGND PECLVCC 36 VBB GND DSYNC 24 38 IOVCC CLK 23 39 PLLVCC CLKN 22 40 PLLGND CLK/2 21 41 VCOVCC CLK/2N 20 42 VCOGND 100pF 0.33µF DGND 19 43 VCOHGND ∗3 DVCC VCC 18 1.6kΩ 100Ω 44 IREF UNLOCK 17 45 RC2 DIVOUT 16 46 RC1 SEROUT 15 100kΩ 10nF 1200pF GND 3.3kΩ Loop Filter ∗4 47 IRGND IOVCC IOGND VCOH VCOL VCO HOLD SYNCH SYNCL SYNC SENABLE SCLK SDATA 48 CS 14 1 2 3 4 5 6 7 8 9 10 11 12 IRVCC TLOAD GND Notes) ∗1 Unless otherwise specified, all capacitors are 0.1µF. ∗2 Vary the external resistor and capacitor values of the UNLOCK output as necessary. ∗3 This external resistor (1.6kΩ) should be a metal film resistor in consideration of temperature characteristics. ∗4 The loop filter's capacitors and resistor should also be temperature compensated. 13 VCC (+5.0V) Control Register HOLD SYNCH, SYNCL: PECL level complementary input – 34 – UNLOCK output∗2 CXA3106Q 34 33 32 31 30 29 28 27 26 DSYNCL CLKH CLKL CLK/2H CLK/2L PECLVCC IOGND TTLVCC 25 TTLGND 35 DSYNCH 37 IOGND PECLVCC 36 VBB (2) Recommended TTL I/O circuit The peripheral circuits mainly use TTL for digital input and output. Of course, PECL and TTL can also be mixed. TTL level output pins DSYNC 24 38 IOVCC CLK 23 39 PLLVCC CLKN 22 40 PLLGND CLK/2 21 41 VCOVCC CLK/2N 20 42 VCOGND 100pF 0.33µF DGND 19 43 VCOHGND ∗3 VCC DVCC 18 1.6kΩ 100Ω 44 IREF UNLOCK 17 45 RC2 DIVOUT 16 46 RC1 SEROUT 15 100kΩ 10nF 1200pF GND 3.3kΩ Loop Filter ∗4 47 IRGND IOVCC IOGND VCOH VCOL VCO HOLD SYNCH SYNCL SYNC SENABLE SCLK SDATA 48 CS 14 1 2 3 4 5 6 7 8 9 10 11 12 IRVCC TLOAD GND Notes) ∗1 Unless otherwise specified, all capacitors are 0.1µF. ∗2 Vary the external resistor and capacitor values of the UNLOCK output as necessary. ∗3 This external resistor (1.6kΩ) should be a metal film resistor in consideration of temperature characteristics. ∗4 The loop filter's capacitors and resistor should also be temperature compensated. 13 VCC (+5.0V) Control Register HOLD SYNC: TTL level input – 35 – UNLOCK output∗2 CXA3106Q Connecting the CXA3106Q with Sony ADC (Demultiplex Mode) When connecting the PLL output to A/D converters with built-in demultiplex function such as the CXA3026AQ/CXA3026Q/CXA3086Q (Sony), a simple system can be configured by connecting the CLK (PECL) and CLKN (PECL) outputs of the CXA3106Q to the CLK (PECL) and CLKN (PECL) inputs of each A/D converter, respectively, and the 1/2 CLK (PECL) and 1/2 CLKN (PECL) outputs of the CXA3106Q to the RESETN (PECL) and RESET (PECL) inputs of each A/D converter, respectively. (when the PLL counter value N is an even number) Wiring Diagram R 8 or 6 VIN CLK (PECL) CLKN (PECL) ADC CXA3026AQ CXA3026Q CXA3086Q TTL 8 or 6 RESETN (PECL) RESET (PECL) CLK (PECL) CLKN (PECL) ADC CXA3026AQ CXA3026Q CXA3086Q CMOS LOGIC 8 or 6 VIN TTL 8 or 6 RESETN (PECL) RESET (PECL) TTL 8 or 6 CLK (PECL) CLKN (PECL) ADC CXA3026AQ CXA3026Q CXA3086Q TTL DSYNC (TTL) 1/2 CLKN (PECL) CLKN (PECL) 1/2 CLK (PECL) CLK (PECL) 1/2 CLK (TTL) 8 or 6 RESETN (PECL) RESET (PECL) TTL CLK (TTL) VIN B RESET (TTL) G TTL • CXA3026AQ 8bit 140MSPS ADC • CXA3026Q 8bit 120MSPS ADC • CXA3086Q 6bit 140MSPS ADC PLL CXA3106Q – 36 – CXA3106Q CXA3106Q and Sony ADC (Demultiplex Mode) Timing The CXA3106Q and CXA3026Q/CXA3026AQ/CXA3086Q timings are shown below. Here, the important timings are as follows. (The clock cycle is labeled as T.) • Within the A/D converters Clock input vs. reset input The setup time is T–1ns and the hold time is 0ns, satisfying the A/D converter specifications. • Within the CMOS LOGIC at the rear end of the A/D converters A/D converter data output vs. 1/2 clock output timing The setup time is T–4.5ns and the hold time is T–0.5ns. (These timings also include combinations of three A/D converters from different lots, and are defined for all operating temperatures and all operating supply voltages. See the CXA3026Q/CXA3026AQ/CXA3086Q specifications for a detailed description.) • Within the CMOS LOGIC at the rear end of the A/D converters DSYNC signal from CXA3106Q vs. A/D converter 1/2 clock output The setup time is T–3ns and the hold time is T–5ns. CXA3106Q T CLK (PECL) out 3 to 7.5ns DSYNC (TTL) out 0 to 1ns 1/2CLK (PECL) out ∗ See the CXA3026AQ/Q and CXA3086Q specifications. CXA3026Q CXA3026AQ CXA3086Q 4.5 to 8ns Thold min. T–5ns Tsetup min. T–3ns 1/2CLK (TTL) out DATA (TTL) out – 37 – Tsetup min. Thold min. T–4.5ns T–0.5ns CXA3106Q Connecting the CXA3106Q with Sony ADC (Straight Mode) When connecting the PLL output to A/D converters such as the CXA3026AQ/CXA3026Q/CXA3086Q (Sony), a simple system can be configured as shown below. Wiring Diagram R 8 or 6 VIN CLK (PECL) CLKN (PECL) TTL ADC CXA3026AQ CXA3026Q CXA3086Q CLK (PECL) CLKN (PECL) CMOS LOGIC 8 or 6 VIN TTL ADC CXA3026AQ CXA3026Q CXA3086Q 8 or 6 VIN CLK (PECL) CLKN (PECL) TTL DSYNC (TTL) CLK (TTL) CLK (PECL) CLKN (PECL) ADC CXA3026AQ CXA3026Q CXA3086Q CLK (TTL) B RESET (TTL) G • CXA3026AQ 8bit 140MSPS ADC • CXA3026Q 8bit 120MSPS ADC • CXA3086Q 6bit 140MSPS ADC PLL CXA3106Q – 38 – CXA3106Q CXA3106Q and Sony ADC (Straight Mode) Timing The CXA3106Q and CXA3026Q/CXA3026AQ/CXA3086Q timings are shown below. Here, the important timings are as follows. (The clock cycle is labeled as T.) • Within the CMOS LOGIC at the rear end of the A/D converters A/D converter data output vs. clock output from CXA3106Q The setup time is T–8.5ns and the hold time is 2ns. (These timings also include combinations of three A/D converters from different lots, and are defined for all operating temperatures and all operating supply voltages. See the CXA3026Q/CXA3026AQ/CXA3086Q specifications for a detailed description.) • Within the CMOS LOGIC at the rear end of the A/D converters DSYNC signal from CXA3106Q vs. clock output from CXA3106Q The setup time is T–4.5ns and the hold time is 1.5ns. CXA3106Q T CLK (PECL) out 1.5 to 4.5ns CLK (TTL) out 1.5 to 3ns DSYNC (TTL) out Thold min. 1.5ns Tsetup min. T–4.5ns CXA3026Q CXA3026AQ CXA3086Q Tsetup min. T–8.5ns Thold min. 2ns 6.5ns min DATA (TTL) out 10ns max – 39 – CXA3106Q CXA3106Q-PWB (CXA3106Q Evaluation Board) The CXA3106Q-PWB is an evaluation board for the CXA3106Q PLL-IC. This board makes it possible to easily evaluate the CXA3106Q's performance using the supplied control program (Note: IBM PC/AT, MS-DOS 5.0 and newer US mode specifications). Features • Two input level (TTL and PECL) SYNC input • Two output level (TTL and PECL) CLK, CLK2 and DSYNC output • Supply voltage: +5.0V Absolute Maximum Ratings (Ta = 25°C) Supply voltage VCC –0.5 to +7.0 Recommended Operating Conditions • Supply voltage VCC 4.75 to 5.25 GND 0 • Digital input (PECL) DIN (High) DIN (Low) (TTL) DIN (High) DIN (Low) • Operating ambient temperature Ta –20 to +75 V V V VCC – 1.1 VCC – 1.5 GND + 2.0 GND + 0.8 V (Min.) V (Max.) V (Min.) V (Max.) °C Block Diagram Loop Filter VCO input (PECL/TTL) DSYNC output (PECL/TTL) CXA3106Q 48pin QFP SYNC input (PECL/TTL) CLK output (PECL/TTL) CLK/2 output (PECL/TTL) VBB (PECL) SEROUT (TTL) 3 DIVOUT (TTL) UNLOCK (TTL) CONTROL BUS (TTL) SENABLE, SCLK, SDATA – 40 – CXA3106Q Setting Methods and Notes on Operation Input pins This PWB supports TTL single and PECL complementary input. Input pins: SYNC: TTL level input, 10 to 100kHz SYNCL: PECL low level input, 10 to 100kHz SYNCH: PECL high level input, 10 to 100kHz VCO: VCOL: VCOH: TTL level input. This is a test pin and is therefore normally not used. PECL low level input. This is a test pin and is therefore normally not used. PECL high level input. This is a test pin and is therefore normally not used. Output pins This PWB supports TTL single and PECL complementary output. DSYNCH, DSYNCL: PECL level complementary delay SYNC outputs. The output range is 10 to 100kHz. DSYNC: TTL level delay SYNC output. The output range is 10 to 100kHz. CLKH, CLKL: PECL level complementary CLK outputs. The output range is 10 to 120MHz. CLK, CLKN: TTL level complementary CLK outputs. The output range is 10 to 80MHz. CLK/2H, CLK/2L: PECL level complementary 1/2 CLK outputs. The output range is 5 to 60MHz. CLK/2, CLK/2N: TTL level complementary CLK outputs. The output range is 5 to 60MHz. VBB: Outputs the PECL amplitude threshold voltage. SEROUT: TTL level control register serial data output. DIVOUT: TTL level internal programmable counter test output. UNLOCK: TTL level UNLOCK output. This pin requires external circuits such as appropriate capacitors and resistors. See the IC specifications for a detailed description. PECL outputs (VBB, DSYNCH, DSYNCL, CLKH, CLKL, CLK/2H, CLK/2L) are output constantly, but TTL outputs (DSYNC, CLK, CLKN, CLK/2, CLK/2N, SEROUT, DIVOUT, UNLOCK) are controlled by the respective control registers. Therefore, the enable/disable settings should be made in accordance with the application. See the following pages for the setting method. – 41 – CXA3106Q Jumper Wire Settings S1, S2: These enable/disable HOLD (Pin 6). HOLD is active high, so the jumper wire should be connected to S2 (HOLD = low) for normal use. When using HOLD, connect the jumper wire to S1 (HOLD = high). (For the initial setting, the jumper wire is connected to S2.) S3, S4: These enable/disable TLOAD (Pin 13). Connect the jumper wire to S4 (TLOAD = high) for normal use. When using TLOAD, connect the jumper wire to S3 (TLOAD = low). (For the initial setting, the jumper wire is connected to S4.) S5, S6: These enable/disable CS (Pin 14). Connect the jumper wire to S6 (CS = high) for normal use. When using Power Save, connect the jumper wire to S5 (CS = low). (For the initial setting, the jumper wire is connected to S6.) Supplied Program This PWB is equipped with a control program that facilitates evaluation of the CXA3106Q. Operation methods and precautions are as follows. 1) Compatible personal computers Use an IBM PC/AT or compatible machine equipped with a 25-pin D-SUB parallel port (printer port). Also, operating systems which support the program are MS-DOS 5.0 or newer and MS-Windows 3.1 or newer. (When using Windows, start the program from the DOS window.) 2) Connect the supplied cable Connect the supplied cable to the parallel port of the personal computer and the DBUS1 connector of the CXA3106Q-PWB. D-SUB 25-pin parallel connector pin arrangement 1 13 14 2pin : SCLK 3pin : SDATA 4pin : SENABLE 11pin : SERIN 19pin : GND 25 3) Connect the power cable and supply power to the CXA3106Q-PWB 4) Start the program A) Boot the personal computer and then shift to the directory containing the program. B) Set MS-DOS to US mode. → US Return or Enter C) Input the program name. → ∗1CXA3106A or CXA3106B Return or Enter → Move to the program screen. ∗1 Only one of either CXA3106A or CXA3106B can be used as the program name depending on the printer port setting of the personal computer. – 42 – CXA3106Q 5) Description of the program screen A) When the program is started, the following initial screen is displayed. Please type the name of the initialization file OR press ENTER. The file extention.INI should not be included. The default file when ENTER is pressed is CXA3106.INI Filename > _ When this screen appears, press the Return or Enter key. The screen shifts to the function setting screen. B) Function settings When the program is loaded, the following function setting screen appears. CXA3106 PLL REGISTERS Divisor 1344 Divider 2 Coarse Delay 00 Fine Delay 10 Charge Pump 10 Polarity Power SYNC DSYNC PD SCAN SYNTH VCO Bypass 1 1 1 OFF ON ON O/P Enable DIVOUT OFF UNLOCK OFF DSYNC CLK2 NCLK2 CLK1 NCLK1 OFF OFF OFF OFF OFF Use arrow keys to select data bit. Press ENTER to toggle and load data. Use Pg Up and Pg Dn to increment/decrement divisor and fine delay registers. Press a to abort, s to scan registers – 43 – MIXED SIGNAL SYSTEMS JAN 1997 CXA3106Q Divisor This is used to input the frequency division ratio of the program counter. The value can be changed as desired from 9 to 4111 by moving the cursor to the position of the number and pressing the Return or Enter key. (Note: The operating range of the CXA3106Q is from 256 to 4096.) The value can also be incremented or decremented by one step by pressing the Page Up or Page Down key, respectively. The internal VCO has an oscillator frequency of 40 to 120MHz, so the output frequency and Divider (VCO frequency divider) setting range are as follows. 40 Divider = 1 120 Divider 1/1 20 1/2 1/4 10 Divider = 2 60 30 Divider = 4 40 80 120 O/P Frequency [MHz] Divider This sets the VCO output frequency division ratio to 1/1, 1/2 or 1/4. The frequency division ratio changes repeatedly in the order of 1/1 → 1/2 → 1/4 → 1/1 each time the cursor is moved to the position of the number and the Return or Enter key is pressed. Coarse Delay This is the DSYNC upper delay time setting. The value can be changed by moving the cursor to the position of the number and pressing the Return or Enter key. The delay time variable range settings are "00" (1 CLK), "01" (2 CLK), "10" (3 CLK) or "11" (4 CLK). Fine Delay This is the DSYNC lower delay time setting. The value can be changed by moving the cursor to the position of the number and pressing the Return or Enter key. The value can also be incremented or decremented by one step by pressing the Page Up or Page Down key, respectively. The delay time can be varied from 1/16 CLK to 32/16 CLK by setting "0" to "31", respectively. Charge Pump This is the charge pump circuit KI setting. The value can be changed by moving the cursor to the position of the number and pressing the Return or Enter key. KI can be set to "00" (about 100µA), "10" (about 400µA) or "11" (about 1.6mA). The setting "01" is not used. (Setting "01" is the same as setting "00".) Polarity These are the SYNC, DSYNC and PD (Phase Detector) polarity inversion settings, and should be set as necessary such as when inverting the SYNC input and DSYNC output waveforms. The setting value "1" is positive polarity, and "0" is negative polarity. These should normally all be set to "1". (Fix PD to "1" other than during test mode.) – 44 – CXA3106Q Power SCAN: This is the control register read setting. When this is ON, the control register serial data is output from SEROUT (Pin 15). This should normally be set to OFF. SYNTH: This is the enable/disable setting for this IC. This should normally be set to ON. VCO Bypass: This is set to OFF when testing the program counter. This should normally be set to ON. O/P Enable These are the enable/disable settings for each TTL output (DIVOUT, UNLOCK, DSYNC, CLK2, NCLK2, CLK1 and NCLK1). Set to ON when performing evaluation using TTL output. – 45 – CXA3106Q C) Description of readout mode This program has a function (readout mode) that reads the contents written to the control registers from the CXA3106Q SEROUT (Pin 15) and displays these contents on the screen. This function is described below. 1) Set SCAN to ON at the function setting screen. 2) Press the S key. The following screen appears. SCAN RESULT, CXA3106 PLL REGISTERS Register 1 DIVREG1 00111000 Register 2 DIVREG2 0101 Register 3 CENFREREG 1011111 Register 4 DELAYREG 0010000 Register 5 CPREG 100 Register 6 TTLPOLREG 00000011 Register 7 TESTPOWREG 0111 Press r to return to PLL REGISTERS MENU. Press a to abort MIXED SIGNAL SYSTEMS AUG 1996 This screen conforms to the Control Register Table listed in the CXA3106Q specifications. 3) Press the R key to return to the original function setting screen. D) Quit the program Press the A key to quit the program. – 46 – CXA3106Q AAAAA AAAAAAAAAAAA AA A AAAAAAA AAAAAAAAAAAA AAAAA AA AAAAAAA AAAAAAAAAAAA AAAAA AA AAAA AAAAAAA AAAAA AAAAAAAAAAAA AAAAA AAAAAAAAA AAAA AAAAA Substrate Pattern (parts surface) Substrate Pattern (solder surface) – 47 – CXA3106Q VCO VCOL BNC3 VCC VCOH BNC2 GND C21 33µ + BNC1 R1 PR10 VBB CXA3106Q PCB v1.1 R19 R8 BNC4 SYNCH R3 PR8 DSYNCL R10 S1 S2 BNC5 SYNCL R7 IC1 PR6 CLKL R4 R11 R6 PR1 CLK/2L PR4 UNLOCK PR11 CLK/2N PR12 CLK/2 PR13 CLKN PR14 CLK 1C 21C 31C 4C 6C 81C 41C 02C 5C C3 2C 01C 11C 7C 81C 51C 71C 61C Silk Screen (solder surface) – 48 – PR5 CLK/2H PR15 DSYNC Silk Screen (parts surface) 91C R5 R12 C9 C8 DBUS1 Control Register R13 PR3 DIVOUT PR7 CLKH S3 S4 S5 S6 SYNC PR2 SEROUT PR9 DSYNCH R9 R14 BNC6 R2 C21 33µ VCC 5 1 GND DBUS1 GND SYNC 9 12 S3 SEROUT S6 15 16 DIVOUT CXA3106Q 19 20 C7 0.1µ 17 18 UNLOCK PR2A PR4A PR3A SEROUT DIVOUT UNLOCK S4 S5 14 13 SDATA 11 SCLK VCC PWR2 GND SYNCL SYNCH 8 HOLD 6 VCO 5 7 VCOL 21 22 23 24 TTLGND 25 TTLVCC 26 IOGND 27 PECLVCC 28 CLK/2L 29 CLK/2H 30 CLKL 31 CLKH 32 DSYNCL 33 DSYNCH 34 VCOH 3 4 VBB 35 PECLVCC 36 IOVCC IOGND 2 IRGND 1 IRVCC 10 SENABLE PWR1 S2 BNC6 SYNC S1 SYNCL BNC5 SYNCH BNC4 C2 0.1µ 38 37 40 39 42 41 43 44 45 48 47 46 DVCC VCO CLK/2N VCOL C12 0.1µ VCOGND DGND BNC3 C3 0.1µ CLKN BNC2 C6 0.1µ RC1 C5 0.1µ RC2 C4 0.1µ IREF C11 100p VCOHGND R19 1.6k GND VCOVCC PLLGND CLK/2 VCOH R18 C19 3.3k 0.33µ C20 1200p PLLVCC IOVCC CLK DSYNC BNC1 Note) R1 to R7 are not mounted. Control Register IOGND TLOAD – 49 – CS PWB Circuit Diagram GND C9 0.1µ C10 0.1µ C8 0.1µ VCC C17 0.1µ C16 0.1µ C18 0.1µ C15 0.1µ C14 0.1µ C13 0.1µ C1 0.1µ R6 R5 R7 R4 R3 R2 R1 VCC R13 330 R12 330 R14 330 R11 330 R10 330 R9 330 R8 330 GND CLK/2N CLK/2 PR11A CLKN PR12A CLK PR13A DSYNC PR14A PR15A CLK/2L PR1A CLK/2H PR5A CLKL PR6A CLKH PR7A DSYNCL PR8A DSYNCH PR9A VBB PR10A CXA3106Q CXA3106Q Package Outline Unit: mm 48PIN QFP (PLASTIC) 15.3 ± 0.4 + 0.1 0.15 – 0.05 + 0.4 12.0 – 0.1 36 25 0.15 24 13.5 37 48 + 0.2 0.1 – 0.1 13 12 0.8 + 0.15 0.3 – 0.1 ± 0.12 M 0.9 ± 0.2 1 + 0.35 2.2 – 0.15 PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE QFP-48P-L04 LEAD TREATMENT SOLDER / PALLADIUM PLATING EIAJ CODE ∗QFP048-P-1212-B LEAD MATERIAL COPPER / 42 ALLOY PACKAGE WEIGHT 0.7g JEDEC CODE NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). – 50 –