Evaluation Board User Guide EVAL-AD7960FMCZ One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Evaluating the AD7960 18-Bit, 5 MSPS PulSAR Differential ADC FEATURES GENERAL DESCRIPTION Full-featured evaluation board for the AD7960 Versatile analog signal conditioning circuitry On-board reference, reference buffers, and ADC drivers System demonstration board compatible (EVAL-SDP-CH1Z) PC software for control and data analysis of time and frequency domain The EVAL-AD7960FMCZ is an evaluation board designed to demonstrate the low power AD7960 performance (18-bit, 5 MSPS PulSAR® differential ADC) and to provide an easy-tounderstand interface for a variety of system applications. A full description of the AD7960 is available in the data sheet and should be consulted when utilizing this evaluation board. EVALUATION KIT CONTENTS The user PC software executable controls the evaluation board over the USB through the Analog Devices, Inc., system demonstration platform board (SDP), EVAL-SDP-CH1Z. EVAL-AD7960FMCZ evaluation board ADDITIONAL EQUIPMENT AND SOFTWARE NEEDED On-board components include the following: System demonstration platform (EVAL-SDP-CH1Z) Precision source World-compatible, 12 V dc supply adapter (enclosed with EVAL-SDP-CH1Z) Power supply, +7 V/−2.5 V (optional) USB cable SMA cable ONLINE RESOURCES Documents Needed AD7960 data sheet EVAL-AD7960FMCZ user guide Required Software EVAL-AD7960FMCZ evaluation software Design and Integration Files Schematics, layout files, bill of materials ADR4520/ADR4540/ADR4550: high precision, buffered band gap 2.048 V/4.096 V/5.0 V reference options AD8031: reference buffer ADA4899-1/ADA4897-1: a signal conditioning circuit with two op amps and an option to use a differential amplifier (ADA4932-1) ADP7102, ADP7104, ADP124, and ADP2300: regulators to derive necessary voltage levels on board This evaluation board interfaces to the SDP board via a 160-pin FMC connector. SMA connectors, JP1/JP4 and JP2/JP5, are provided for the low noise analog signal source. TO +12V WALL WART SIGNAL SOURCE SMA CONNECTOR PC 11228-002 USB Figure 1. Setting Up the EVAL-AD7960FMCZ PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Software ...............................................................7 Evaluation Kit Contents ................................................................... 1 Software Installation .....................................................................7 Additional Equipment and Software Needed ............................... 1 Launching The Software ..............................................................9 Online Resources .............................................................................. 1 Software Operation .................................................................... 10 General Description ......................................................................... 1 WaveForm Capture .................................................................... 12 Revision History ............................................................................... 2 DC Testing—Histogram ............................................................ 13 Functional Block Diagram .............................................................. 3 AC Testing—Histogram ............................................................ 13 Evaluation Board Hardware ............................................................ 4 AC Testing—FFT Capture ........................................................ 14 Device Description ....................................................................... 4 Summary Tab .............................................................................. 15 Hardware Link Options ............................................................... 4 Troubleshooting .............................................................................. 16 Power Supplies .............................................................................. 4 Software ....................................................................................... 16 Serial Interface .............................................................................. 5 Hardware ..................................................................................... 16 Analog Inputs ................................................................................ 5 Evaluation Board Schematics and Artwork ................................ 17 Reference Options ........................................................................ 6 Bill of Materials ............................................................................... 25 Layout Guidelines ......................................................................... 6 Related Links ............................................................................... 27 Basic Hardware Setup .................................................................. 6 REVISION HISTORY 8/13—Revision 0: Initial Version Rev. 0 | Page 2 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ FUNCTIONAL BLOCK DIAGRAM +12V WALL WART ADP7102 +5V ADP7104 +12V ADP2300 +12V +7V USB PORT –VS = –2.5V ADR4550 +7V POWER SUPPLY CIRCUITRY ADP124 +5V +5V AD8031 +1.8V +VS REFIN VIN+ REF VDD1 VDD2 VIO CNV± 100Ω AD4899-1 ADSP-BF527 –VS IN+ 100Ω D± AD7960 LVDS INTERFACE +7V 100Ω DCO± IN– VIN– GND AD4899-1 –VS SPARTAN-6 FPGA XC6SLX25 CLK± VCM 100Ω 2.5V +7V VCM AD8031 EVAL-AD7960FMCZ EVAL-SDP-CH1Z 160-PIN 10mm VITA 57 CONNECTOR Figure 2. Rev. 0 | Page 3 of 28 11228-001 –VS EVAL-AD7960FMCZ Evaluation Board User Guide EVALUATION BOARD HARDWARE DEVICE DESCRIPTION POWER SUPPLIES The AD7960 is a 5 MSPS, high precision, power efficient, 18-bit PulSAR ADC that uses SAR-based architecture and does not exhibit any pipeline delay or latency. The AD7960 is specified for use with 5 V and 1.8 V supplies (VDD1, VDD2). The interface from the digital host to the AD7960 uses 1.8 V logic only. The power (+12 V) for the EVAL-AD7960FMCZ board comes through a 160-pin FMC connector, J7, from the EVAL-SDPCH1Z. The customer also has the option of using external bench top supplies to power the on-board amplifiers. On-board regulators generate required levels from the applied +12 V rail. The AD7960 uses an LVDS interface to transfer data conversions. Complete AD7960 specifications are provided in the product data sheet and should be consulted in conjunction with this user guide when using the evaluation board. Full details on the EVAL-SDP-CH1Z are available on the Analog Devices website. The ADP7102 (U18) supplies +7 V for the +VS of the ADC driver amplifiers (ADA4899-1 or ADA4897-1), external reference ADR4550 (U5), and ADR4540 (U8), while the ADP7104 (U10) delivers +5 V for VDD1 (U1), ADP2300 (U2), and ADP124 (U3 and U12). The ADP2300 (U2), in turn, generates −2.5 V for the amplifier’s –VS and the ADP124 (U3 and U12), in turn, provides a 1.8 V for VDD2 and VIO (U1). HARDWARE LINK OPTIONS The function of the link options are described in Table 1. When the user first receives the board, the default link setting on the board are as shown in Table 1 (analog input/reference/power supplies, and so on). The +3.3 V supply for the EEPROM (U7) comes from the EVAL-SDP-CH1Z through a 160-pin FMC connector, J7. Each supply is decoupled where it enters the board and again at each device. A single ground plane is used on this board to minimize the effect of high frequency noise interference. Table 1. Pin Jumper Descriptions Link JP1, JP2 Default B to center JP3, JP4 JP5 JP7 JP8 JP9 LK2, LK3 LK4 LK5 LK6 LK7 B to center A to center A to center B to center B to center Inserted A B B B Purpose Connects analog inputs VIN+ and VIN− to the inputs of the ADC driver ADA4899-1 or ADA4897-1. A to center sets the fully differential path through ADA4932-1. Connect outputs from ADA4899-1 to inputs of AD7960. A to center set the fully differential path through ADA4932-1. Connect the VCM output from AD7960 to AD8031. Connects REFIN to 2.048 V external reference. B to center connects REFIN to GND. Connects +7 V to amplifier +VS. Connects −2.5 V to amplifier −VS. Option to use external amplifier supplies + VS and – VS. Connects to +7 V coming from ADP7102. Connects to −2.5 V coming from ADP2300. Connects the output of VCM buffer to VCM of amplifier. Connects the +5 V output from ADR4550 to REF buffer AD8031. Table 2. On-Board Connectors Connector J1, J2, J4, J5 J3 J6 J7 Function SMA Analog Input. Connects the low noise analog signal source to the inputs of the ADC driver ADA4899-1, ADA4897-1, or ADA4932-1. 3-Pin Terminal. This option is for using external bench top supplies. Apply external +Vs, −Vs, and GND to power amplifiers on the EVAL-AD7960FMCZ board. 6-Pin (2 × 3) Socket. This option is for interfacing with an external ADC driver board. 160-Pin FMC 10 mm Male VITA 57 Connector. This connector mates with the EVAL-SDP-CH1Z board. Rev. 0 | Page 4 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ Table 3. On-Board Power Supplies Description Power Supply +VS Voltage Range (V) +5 V to +7 V −VS −2 V to −5 V |+VS to −VS| VDD1 VDD2, VIO 12 V1 5 V2 1.8 V2 Purpose ADP7104 (U10) and ADP7102 (U18) generate the necessary +5 V and +7 V, respectively, from +12 V coming from EVAL-SDP-CH1Z. The +7 V supply is recommended for on-board amplifier +VS. The +5 V supply is provided to VDD1 (U1), ADP2300 (U2), ADR4540/ADR4550 (U5 and U8), and ADP124 (U3 and U12). The user also has an option to use an external bench top supply +VS through J3. ADP2300 generates −2.5 V for amplifier −VS. The user also has an option to use an external bench top supply −VS through J3. Maximum range of supply for correct operation. AD7960 Analog Supply Rail. ADC Supply Rails. Dictated by ADA4899-1 supply operation. Refer to the AD7960 data sheet 1 2 SERIAL INTERFACE The EVAL-AD7960FMCZ uses the serial interface connection to the EVAL-SDP-CH1Z. The EVAL-AD7960FMCZ operates only in echo-clocked serial interface mode. This mode requires three LVDS pairs (D±, CLK±, and DCO±) between each AD7960 and the digital host. The EVAL-SDP-CH1Z board features include • • • • • • • • • XILINX Spartan®-6 FPGA DDR2 • Micron MT47H32M16Hr-25E:G −8 Mb × 16 bits × 4 Banks(512 Mb/64 Mb) SRAM • ISSI IS61WV25616BLL-10BLI –256 kB × 16 bits (4 Mb/512 kB) 1 × 160-pin FMC-LPC connector (refer to the VITA 57 specification) • Samtec ASP-134603-01 • Up to 1080 Mbps LVDS • Single-ended LVCMOS • Power Analog Devices ADSP-BF527 Blackfin® processor • Core performance up to 600 MHz • 208-ball CSP-BGA package • 24 MHz CLKIN oscillator 32 Mb flash memory • Numonyx M29W320EB or • Numonyx M25P32 SDRAM memory • Micron MT48LC16M16A2P-6A −16 Mb × 16 bits (256 Mb/32 MB) 2 × 120-pin small foot print connectors • Hirose FX8-120P-SV1(91),120-pin header Blackfin processor peripherals exposed • SPI • SPORT • TWI/I2C • • • GPIO PPI Asynchronous parallel ANALOG INPUTS This section provides information on the analog input options and how these options can be configured as well as information on how customers should connect their signal source. The analog inputs applied to the EVAL-AD7960FMCZ board are J1 and J2 SMA (push-on) connectors. These inputs are buffered with dedicated discrete driver amplifier circuitry (U15 and U16 or U14) as shown in Figure 1. The circuit allows for different configurations, input range scaling, filtering, the addition of a dc component, and the use of a different op amp, and a differential amplifier and supplies. The analog input amplifiers are set as unity gain buffers at the factory. The driver amplifiers (U14, U15, and U16) positive rails are driven from +7 V (from ADP7102, U18) and negative rail from −2.5 V; the other reference buffers (U4 and U11) positive rails are driven from +7 V and negative rails are grounded; these could be changed to a different value as required. The range of supplies possible is listed in Table 3. The default configuration sets both U15 and U16 at mid-scale generated from a buffered reference voltage (VCM) of the AD7960 (U1). The evaluation board is factory configured for providing either a single-ended path or a fully differential path as described in Table 1. For dynamic performance, an FFT test can be performed by applying a very low distortion source. For low frequency testing, the audio precision source can be used directly because the outputs on these are isolated. Set the outputs for balanced and floating. Different sources can be used though most are single ended and use a fixed output resistance. Since the evaluation board uses the amplifiers in unity gain, the noninverting input has a common-mode input with a series 49.9 Ω resistor and it needs to be taken into account when directly connecting a source (voltage divider). Rev. 0 | Page 5 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide REFERENCE OPTIONS BASIC HARDWARE SETUP The EVAL-AD7960FMCZ board allows three reference voltage options. The user can select either the 5 V or 4.096 V option using the solder link LK7or the 2.048 V on-board reference voltage using solder link JP7 as described in Table 1. The various options for using this reference are controlled by the EN1 and EN0 pins (EN bits on software) as described in detail in the AD7960 data sheet. The AD7960 evaluation board connects to the (EVAL-SDPCH1Z) system demonstration board. The EVAL-SDP-CH1Z board is the controller board, which is the communication link between the PC and the main evaluation board. LAYOUT GUIDELINES 1. When laying out the printed circuit board (PCB) for the AD7960, follow the recommended guidelines described in this section to obtain the maximum performance from the converter. Figure 30 to Figure 35 show the recommended layout for the AD7960 evaluation board. Figure 1 shows a photograph of the connections made between the EVAL-AD7960FMCZ daughter board and the EVAL-SDPCH1Z board. 2. • Solder the AD7960 exposed paddle (Pin 33) directly to the PCB and connect the paddle to the ground plane of the board using multiple vias. • Decouple all the power supply pins (VDD1, VDD2, and VIO) and the REF pin with low ESR and low ESL ceramic capacitors, typically 10 µF and 100 nF, placed close to the DUT (U1) and connected using short, wide traces. This provides low impedance paths and reduces the effect of glitches on the power supply lines. • Use a 50 Ω single-ended trace and a 100 Ω differential trace. • Separate analog and digital sections and keep power supply circuitry away from the AD7960. • Avoid running digital lines under the device as well as crossover of digital and analog signals because these couple noise into the AD7960. • Fast switching signals, such as CNV or clocks, should not run near analog signal paths. • Remove the ground and power plane beneath the input (including feedback) and output pins of the amplifiers (U14, U15, and U16) since they create an undesired capacitor. 3. 4. 5. Rev. 0 | Page 6 of 28 Install the AD7960 software. Ensure the EVAL-SDP-CH1Z board is disconnected from the USB port of the PC while installing the software. The PC must be restarted after the installation. Before connecting power, connect the EVAL-AD7960FMCZ board’s 160-pin FMC connector, J7, to the connector J4 on the EVAL-SDP-CH1Z board. Nylon screws are included in the EVAL-AD7960FMCZ evaluation kit and can be used to ensure the EVAL-AD7960FMCZ and the EVAL-SDPCH1Z boards are connected firmly together. Connect the +12 V power supply adapter included in the kit to the EVAL-SDP-CH1Z. Connect the EVAL-SDP-CH1Z board to the PC via the USB cable. Windows XP users may need to search for the EVAL-SDP-CH1Z drivers. Choose to automatically search for the drivers for the EVAL-SDP-CH1Z board if prompted by the operating system. Launch the EVAL-AD7960FMCZ software from the Analog Devices subfolder in the Programs menu. The full software installation procedure is detailed in the Evaluation Board Software section. Evaluation Board User Guide EVAL-AD7960FMCZ EVALUATION BOARD SOFTWARE SOFTWARE INSTALLATION The evaluation board software is available to download from the evaluation board page on Analog Devices website. Click the setup.exe file to run the install. The default location for the software is C:\Program Files (x86)\Analog Devices\ AD7960_61 Evaluation Software. Install the evaluation software before connecting the evaluation board and EVAL-SDP-CH1Z board to the USB port of the PC to ensure that the evaluation system is correctly recognized when connected to the PC. Figure 5. AD7960 Install Window 2 11228-003 Figure 6. AD7960 Install Window 3 11228-004 11228-006 • AD7960 evaluation board software installation • EVAL-SDP-CH1Z board driver installation Figure 3 to Figure 9 show the separate steps to install the AD7960 evaluation software while Figure 10 to Figure 14 show the separate steps to install the EVAL-SDP-CH1Z drivers. Proceed through all of the installation steps to allow the software and drivers to be placed in the appropriate locations. Only after the software and drivers have been installed, should you connect the EVAL-SDP-CH1Z board to the PC. 11228-005 There are two parts of the software installation process: Figure 7. AD7960 Install Window 4 11228-007 Figure 3. User Account Control Figure 4. AD7960 Install Window 1 Rev. 0 | Page 7 of 28 Evaluation Board User Guide 11228-011 11228-008 EVAL-AD7960FMCZ Figure 11. EVAL-SDP-CH1Z Drivers Setup Window 2 Figure 9. AD7960 Install Window 6 11228-012 11228-009 Figure 8. AD7960 Install Window 5 11228-013 Figure 12. EVAL-SDP-CH1Z Drivers Setup Window 3 11228-010 Figure 13. EVAL-SDP-CH1Z Drivers Setup Window 4 Figure 10. EVAL-SDP-CH1Z Drivers Setup Window 1 Rev. 0 | Page 8 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ LAUNCHING THE SOFTWARE Once the EVAL-AD7960FMCZ and EVAL-SDP-CH1Z are correctly connected to your PC, the AD7960 software can be launched. 1. 11228-014 2. 3. From the Start menu, select Programs>Analog Devices> AD7960_61 Evaluation Software. The main window of the software then displays (see Figure 19). If the evaluation system is not connected to the USB port via the EVAL-SDP-CH1Z when the software is launched, a connectivity error displays (see Figure 17). Connect the evaluation board to the USB port of the PC. Wait for a few seconds and then click Rescan (see Figure 18. Figure 15. EVAL-SDP-CH1Z Drivers Setup Window 6 11228-017 11228-015 Figure 14. EVAL-SDP-CH1Z Drivers Setup Window 5 Figure 17. Connectivity Error Alert 1 After installation is complete, connect the EVALAD7960FMCZ to the EVAL-SDP-CH1Z as described in the Evaluation Board Hardware section. When you first plug in the EVAL-SDP-CH1Z board via the USB cable provided, allow the new Found Hardware Wizard to run. Once the drivers are installed, you can check that the board has connected correctly by looking at the Device Manager of the PC. The Device Manager can be accessed via My Computer> Manage>Device Manager from the list of System Tools. The EVAL-SDP-CH1Z board should appear under ADI Development Tools. 11228-018 This completes the installation. 11228-016 Figure 18. Connectivity Error Alert 2 Figure 16. Device Manager Rev. 0 | Page 9 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide SOFTWARE OPERATION This section describes the full software operation and all windows that appear. When the software is launched, the panel opens and the software searches for hardware connected to the PC. The user software panel launches as shown in Figure 19. The labels listed in this section correspond to the numbered labels in Figure 19. File Menu (Label 1) The File menu, labeled 1 in Figure 19, offers the choice to • Save Captured Data: saves data to a .csv file • Load Captured Data: loads data for analysis • Take Screenshot: saves the current screen • Print: prints the window to the default printer • Exit: quits the application Select the number of Samples to analyze, when running the software; this number is limited to 131,072 samples. Single Capture performs a single capture whereas Continuous Capture performs a continuous capture from the ADC. Eval Board Connected (Label 8) This indicator shows that the device connected. Voltage Reference (Label 9) The Edit menu, labeled 2, provides the following offering: The various options for using the external reference are controlled by the Voltage Reference option. The default value is set to 5 V (External Buffer). The other voltage reference voltage options are 4.096 V and 2.048 V. It is recommended to use an on-board AD8031 as an external reference buffer. Initialize to Default Values: This option resets the software to its initial state Help Menu (Label 3) The Help menu, labeled 3, offers help from the • • • • Samples (Label 5) Single Capture (Label 6) and Continuous Capture (Label 7) Edit Menu (Label 2) • of operating a maximum sample frequency up to 5,000 kSPS. If the user enters a value larger than the ability of the AD7960, the software indicates this and the user must revert to the maximum sample frequency. Tabs Analog Devices website User Guide Context Help About There are four additional tabs available for displaying the data in different formats. Throughput (Label 4) The default throughput (sampling frequency) is 5,000 kilo samples per second (kSPS). The user can adjust the sampling frequency, however there are limitations around the sample frequency related to the SCLK frequency applied; the sample frequency must be at least 500 kSPS. The AD7960 is capable • • • • Waveform Histogram FFT Summary To exit the software, go to File>Exit. Rev. 0 | Page 10 of 28 Evaluation Board User Guide 2 3 5 8 6 7 9 4 11228-019 1 EVAL-AD7960FMCZ Figure 19. Setup Screen Rev. 0 | Page 11 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide WAVEFORM CAPTURE Figure 20 illustrates the Waveform tab. The 1 kHz sine-wave input signal was used along with an on-board 5 V external reference. Note that Label 1 shows the Waveform Analysis which reports the amplitudes recorded from the captured signal in addition to the frequency of the signal tone. CONTROL CONTROL CONTROL CURSOR ZOOMING PANNING 11228-020 1 Figure 20. Waveform Capture Tab Rev. 0 | Page 12 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ DC TESTING—HISTOGRAM AC TESTING—HISTOGRAM The histogram is most often used for dc testing where a user tests the ADC for the code distribution for dc input and computes the mean and standard deviation, or transition noise, of the converter, and displays the results. Raw data is captured and passed to the PC for statistical computations. Figure 21 shows the Histogram tab. This tests the ADC for the code distribution for ac input and computes the mean and standard deviation, or transition noise, of the converter and displays the results. Raw data is captured and passed to the PC for statistical computations. To perform a histogram test, To perform a histogram test, 1. Select the Histogram tab. 1. Select the Histogram tab. 2. Click Single Capture or Continuous Capture. 2. Click Single Capture or Continuous Capture. Note that a histogram test can be performed without an external source since the evaluation board has a buffered VREF/2 source at the ADC input. To test other dc values, apply a source to the J1/J2 inputs. You may be required to filter the signal to make the dc source noise compatible with that of the ADC. Note that an ac histogram needs a quality signal source applied to the input J1/J2 connectors. Figure 21 shows the histogram for a 1 kHz sine wave applied to the ADC input and the results calculated. The Histogram Analysis (Label 1) illustrates the various measured values for the data captured. 11228-021 1 Figure 21. Histogram Capture Tab Rev. 0 | Page 13 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide AC TESTING—FFT CAPTURE Figure 22 shows the FFT tab. This tests the traditional ac characteristics of the converter and displays a fast Fourier transform (FFT) of the results. As in the histogram test, raw data is captured and passed to the PC where the FFT is performed displaying SNR, SINAD, THD, and SFDR. Furthermore, if using a low frequency band-pass filter when the full-scale input range is more than a few V p-p, it is recommended to use the on-board amplifiers to amplify the signal, thus preventing the filter from distorting the input signal. To perform an ac test, apply a sinusoidal signal to the evaluation board at the SMA inputs J1/J2. Very low distortion, better than 130 dB input signal source (such as audio precision) is required to allow true evaluation of the part. One possibility is to filter the input signal from the ac source. There is no suggested bandpass filter, but carefully consider the choices. • • Figure 22 displays the results of the captured data. • Shows the input signal information (see Label 1) Displays the fundamental frequency and amplitude in addition to the 2nd to 5th harmonics (see Label 2) Displays the performance data, including SNR, dynamic range, THD, SINAD, and noise performance (see Label 3) 3 1 11228-022 2 Figure 22. FFT Capture Tab Rev. 0 | Page 14 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ SUMMARY TAB information, including key performance parameters, such as SNR and THD. 11228-023 Figure 23 shows the Summary tab which captures all the display information and provides it in one panel with a synopsis of the Figure 23. Summary Tab Rev. 0 | Page 15 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide TROUBLESHOOTING This section provides hints on how to prevent problems and what to check when you encounter problems with the software and hardware. SOFTWARE Review the following points regarding software: • • • • • • Always install the software prior to connecting the hardware to the PC. Always allow the install to fully complete (the software installation is a two-part process: installing the ADC software and the SDP drivers). This may require a restart. When you first plug in the EVAL-SDP-CH1Z board via the USB cable provided, allow the new Found Hardware Wizard to run. Though this may take time, do this prior to starting the software. If the board does not appear to be functioning, ensure that the ADC evaluation board is connected to the EVAL-SDPCH1Z board and that the board is recognized in the Device Manager, as shown in Figure 7. If connected to a slower USB port where the EVAL-SDPCH1Z cannot read quickly, a timeout error may occur. In this case, it is advised not to read continuously or, alternatively, to lower the number of samples taken. Note that when reading continuously from the ADC, the recommended number of samples is up to 65,536. HARDWARE If the software does not read any data back, • With the +12 V wall wart plugged in to the EVAL-SDPCH1Z board, check to make sure that the voltage applied is within the ranges shown in Table 3. • Using a DMM, measure the voltage present at +12 V and the VADJ test points, which should read +12 V and 2.5 V, respectively. The +12V_FMC LED of the EVALAD7960FMCZ board and the LEDs of the EVAL-SDPCH1Z board (FMC_PWR_GO, SYS_PWR, FPGA_DONE, BF_POWER, LED0, and LED2) should all be lit. • Launch the software and read the data. If nothing happens, exit the software. • Remove the +12 V wall wart and USB from the EVALSDP-CH1Z board and then reconnect them and relaunch the software. • If this is not successful, confirm that the EVALAD7960FMCZ and EVAL-SDP-CH1Z boards are connected together so that the EVAL-AD7960FMCZ is recognized in the Device Manager, as shown in Figure 7. Note that when working with the software in standalone/offline mode (no hardware connected), if you later choose to connect hardware, first close and then relaunch the software. Rev. 0 | Page 16 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ EVALUATION BOARD SCHEMATICS AND ARTWORK +5V ADP7104ACPZ-5.0 +7V ADP7102ACPZ R7 R63 8 +12V_FMC VIN VOUT U10 C34 4.7µF 5 PG_C2M N/C 1 +5V 8 +12V_FMC 0Ω 4 SENSE 2 EN/UVLO 7 PG VOUT U18 5 PG_C2M C36 4.7µF GND EP GND 3 9 6 VIN C69 4.7µF N/C 1 +7V 0Ω 4 R18 57.6kΩ ADJ 2 EN/UVLO PG 7 C70 4.7µF GND EP GND 3 9 6 R19 12.1kΩ R62 100kΩ VIN = +12V, VOUT = +5V, IOUT = UP TO 500mA VIN = +12V, VOUT = +7V, IOUT = UP TO 300mA C37 + 4.7µF –2.5V U2 ADP2300AUJZ 1 BST 5 VIN C38 4.7µF SW 4 EN FB 0.1µF PD3S130L 1A, 30V 1 R12 2 + 6 4.7µH + D3 L2 IND 2 1 +5V C66 –2.5V 0Ω + 10µF C71 R11 3 GND 2 35.7kΩ R6 11228-024 16.9kΩ VIN = +5V, VOUT = –2.5V, IOUT = 250mA Figure 24. Schematic Page 1 LK4 B C16 10µF AMP_PWR+ 8 IN 7 IN AMP_PWR+ 1 C30 1uF 2 AMP_PWR+_EXT VIO_1.8V U3 3 A +5V JP8 +7V OUT 1 OUT 2 5 EN OUTSEN 3 6 NC R20 VIO 0Ω C14 1uF 4 GND EP 9 ADP124ACPZ-1.8 LK2 +5V C19 10µF J3-1 SCREW TERMINALS J3-2 1.8V U12 J3-3 8 IN 7 IN AMP_PWR-_EXT C64 4.7µF LK3 AMP_PWR– 1 5 EN OUTSEN 3 6 NC R4 1.8V 0Ω C63 4.7µF 4 GND EP 9 ADP124ACPZ-1.8 AMP_PWR– 3 JP9 2 C29 10µF OUT 1 OUT 2 LK5 A B C18 10µF THE ADP124 IS AVAILABLE IN 2mm x 2mm LFCSP PACKAGES. OP-AMP POWER SUPPLY OPTIONS Figure 25. Schematic Page 2 Rev. 0 | Page 17 of 28 11228-025 –2.5V Rev. 0 | Page 18 of 28 Figure 26. Schematic Page 3 0Ω R30 0Ω R39 0Ω 0.1µF 10µF C60 10µF 0.1µF 10µF U13 ADR4520BRZ C35 0.1µF GND 4 6 VOUT 6 GND 4 2 +VIN VOUT C43 C44 GND 4 U8 ADR4540BRZ 2 +VIN C20 C42 VOUT 6 C61 0.1µF C23 2.2µF C21 2.2µF C62 10µF LK7 1 0Ω R26 4.096V_REF 2.048V C24 TBD DNI 0Ω R15 C22 TBD DNI 0Ω R21 R23 DNI 0Ω C25 DNI R25 TBD DNI REFIN R22 2 3 TBD DNI C26 0Ω R24 7 AD8031ARZ V+ OP 6 V– 4 DNP R45 – + U4 C27 0.1µF 0Ω R14 REF REF VCM_OUT REF AMP_PWR+ THERE ARE 3 OPTIONS FOR USING AN EXTERNAL REFERENCE: 1) EXTERNALLY BUFFERED REFERENCE SOURCE OF 5V APPLIED TO THE REF PIN. 2)EXTERNALLY BUFFERED REFERENCE SOURCE OF 4.096V APPLIED TO THE REF PIN. 3)EXTERNAL REFERENCE OF 2.048V APPLIED TO THE REFIN PIN (HIGH IMPEDANCE INPUT). THE ON-CHIP BUFFER GAINS THIS BY 2 AND DRIVES THE REF PIN WITH 4.096V. +5V +7V 2 +VIN A B R16 JP7 C11 10µF VCM_OUT 1 10µF C4 R36 1MΩ 7 V+ V– 4 3 + 2 – U11 AD8031ARZ 0.1µF C6 VCM_EXTERNAL 3 JP5 2 5V_REF 2 3 OP 6 C40 0.1µF A B U5 ADR4550BRZ LK6 0Ω R17 VCM GND2 VCM VCM AMP_PWR+ EVAL-AD7960FMCZ Evaluation Board User Guide 11228-026 Evaluation Board User Guide EVAL-AD7960FMCZ AMP_PWR+ ANALOG FRONT END C58 6 PIN (2x3) 0.1" PITCH THR/A SOCKET R48 R57 0Ω 820Ω ADA4899-1 U15 8 7 D 3 + V+ VOUT V– 6 2– V– 5 FB 4 1 R10 OP_AMP+ J6-1 VCM 100pF C76 J6-2 J6-3 J6-4 R28 0Ω J6-5 AMP_PWR+ J6-6 VCM C59 1kΩ R38 C54 DNP 0.1µF AMP_PWR– R35 0Ω 0Ω R41 AMP_PWR– C55 DNP AMP_PWR+ 0Ω 820Ω C56 ADA4899-1 8 U16 7 D V+ 3 + VOUT V– 6 2– 5 V– FB 4 R60 1 0Ω R27 OP_AMP– OP_AMP+ JP1 0Ω R29 0Ω VCM AMP_PWR– 1kΩ C47 3 R40 DNP C53 DNP JP4 3 C52 0.1µF JP2 1 IN+ 33Ω C57 OP_AMP– 2 AMP_PWR+ 1 R53 IN– 33Ω C48 2 C41 0.1µF R49 499Ω C50 DNP R43 499Ω R55 DNP 5 VS+ VS+ 6 VS+ 7 U14 ADA4932-1 3 IN– OUT+ 10 4 FB+ VCM 9 AMP_PWR– VCM C46 C45 0.1µF 11228-027 R54 DNP OUT– 11 2 IN+ VS– R51 0Ω PD 12 13 DIFF_IN+ R44 499Ω 14 VS– R50 0Ω VS– DIFF_IN– 1 FB– 499Ω VS– GND3 C51 DNP 15 R42 R56 DNP VS+ 8 DIFF_IN– 16 AIN– J4 R52 R37 DIFF_IN+ J1 C49 1 2 1 2 AIN+ J5 C77 100pF 3 J2 3 R58 JP3 R59 Figure 27. Schematic Page 4 Rev. 0 | Page 19 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide C1 AND C10 SHOULD BE PLACED BETWEEN REF AND REF_GND AND BE PLACED VERY CLOSE TO THE DUT REF C1 C10 0.1µF +5V 1.8V 1 2 3 4 5 6 7 8 REFIN 0.1µF C8 10µF C9 0.1µF EN1 EN2 EN3 EN0 TO EN3 ARE 1.8V LOGIC R31 0Ω R32 0Ω R33 0Ω R34 0Ω VDD1 VDD2 REFIN EN0 EN1 EN2 EN3 CNV– 33 PADDLE GND IN+ IN– VCM VDD1 VDD1 VDD2 CLK+ 24 23 22 21 20 19 18 17 IN+ IN– VCM_OUT +5V +5V 1.8V CLK+ CNV+ D– D+ VIO GND DCO– DCO+ CLK– 0.1µF EN0 C15 C17 0.1µF C3 0.1µF TP2 C12 0.1µF C2 0.1µF 9 10 11 12 13 14 15 16 C7 1.8V 32 31 30 29 28 27 26 25 U1 REF REF REF REF REF_GND REF_GND REF_GND VDD2 10µF CNV– TP4 R2 100Ω R1 100Ω TP3 TP1 CLK– CNV+ DC5 TP6 TP5 D+ TP7 Figure 28. Schematic Page 5 Rev. 0 | Page 20 of 28 11228-028 ALL THE DECOUPLING CAPACITORS MUST BE PLACED VERY CLOSE TO THE DUT DCO– DCO+ VIO TP8 GA0 GA1 8 VCC 7 WP 6 SCL 5 SDA C186 0.1uF EEPROM REQUIRED IN VITA STANDARD I2C LINE PULL-UP RESISTORS ON FPGA BOARD 24LC02 1 2 A0 3 A1 4 A2 VSS 0Ω R9 Figure 29. Schematic Page 6 Rev. 0 | Page 21 of 28 PG_C2M R101 560Ω 2 NC7S04 U17 4 +12V_FMC GREEN R64 U7 GND DP0_C2M_P DP0_C2M_N GND GND DP0_M2C_P DP0_M2C_N GND GND LA06_P LA06_N GND GND LA10_P LA10_N GND GND LA14_P LA14_N GND GND LA18_P_CC LA18_N_CC GND GND LA27_P LA27_N GND GND SCL SDA GND GND GA0 12.0V GND 12.0V GND 3.3V GND 10kΩ J7-A ASP-134606-01 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 AK20 C11 AK21 C12 C13 C14 AJ24 C15 AK25 C16 C17 C18 AD21 C19 AE21 C20 C21 C22 AD27 C23 AD28 C24 C25 3.3V AUX C26 AJ28 C27 AJ29 C28 C29 FPGA I2C LINES C30 C31 C32 C33 C34 GA0 C35 +12V C36 C37 +12V_FMC C38 C39 C40 GA1 3P3VAUX CNV+ CNV- PG_C2M EN0 EN1 EN2 EN3 0.1uF C31 1.8V 9 7 6 5 4 3 2 J7-B ASP-134606-01 D1 D2 D3 D4 D5 D6 D7 D8 AE23 D9 AF23 D10 D11 AG22 D12 AH22 D13 D14 AK23 D15 AK24 D16 D17 AB24 D18 AC25 D19 D20 AB27 D21 AC27 D22 D23 AH26 D24 AH27 D25 D26 AK29 D27 AK30 D28 D29 D30 D31 D32 D33 D34 D35 D36 D37 D38 D39 D40 8 OE GND T/R3 A3 A2 A1 A0 T/R0 17 EP T/R2 B3 B2 B1 B0 T/R1 EN0_FMC FXL4TD245BQX 10 EN1_FMC EN2_FMC EN3_FMC 11 0.1uF J7-C ASP-134606-01 G1 G2 G3 G4 G5 G6 AD23 CLK+ G7 AE24 CLK– G8 G9 AG20 EN0_FMC G10 AH20 EN1_FMC G11 G12 AJ22 G13 AJ23 G14 G15 AA20 G16 AB20 G17 G18 AC22 G19 AD22 G20 G21 AF26 G22 AF27 G23 G24 AJ27 G25 AK28 G26 G27 AC26 G28 AD26 G29 G30 AE28 G31 AF28 G32 G33 AD29 G34 AE29 G35 VADJ G36 AC29 G37 AC30 G38 VADJ G39 G40 12 13 14 15 U9 1 16 VCCA VCCB C28 VADJ PG_C2M GND GND GBTCLK0_M2C_P GBTCLK0_M2C_N GND GND LA01_P_CC LA01_N_CC GND LA05_P LA05_N GND LA09_P LA09_N GND LA13_P LA13_N GND LA17_P_CC LA17_N_CC GND LA23_P LA23_N GND LA26_P LA26_N GND TCK TDI TDO 3.3V AUX TMS TRST_L GA1 3.3V GND 3P3V GND 3.3V FMC-LPC MALE CONNECTOR GND CLK1_M2C_P CLK1_M2C_N GND GND LA00_P_CC LA00_N_CC GND LA03_P LA03_N GND LA08_P LA08_N GND LA12_P LA12_N GND LA16_P LA16_N GND LA20_P LA20_N GND LA22_P LA22_N GND LA25_P LA25_N GND LA29_P LA29_N GND LA31_P LA31_N GND LA33_P LA33_N GND VADJ GND VADJ EN2_FMC EN3_FMC D+ D– DCO+ DCO– J7-D ASP-134606-01 H1 H2 H3 H4 AF22 H5 AG23 H6 H7 AF20 H8 AF21 H9 H10 AH21 H11 AJ21 H12 H13 AG25 H14 AH25 H15 H16 AE25 H17 AF25 H18 H19 AC24 H20 AD24 H21 H22 AJ26 H23 AK26 H24 H25 AG27 H26 AG28 H27 H28 AG30 H29 AH30 H30 H31 AE30 H32 AF30 H33 H34 AB29 H35 AB30 H36 H37 Y30 H38 AA30 H39 H40 VREF_A_M2C PRSNT_M2C_L BOARD PRESENT PIN GND CLK0_M2C_P CLK0_M2C_N GND LA02_P LA02_N GND LA04_P LA04_N GND LA07_P LA07_N GND LA11_P LA11_N GND LA15_P LA15_N GND LA19_P LA19_N GND LA21_P LA21_N GND LA24_P LA24_N GND LA28_P LA28_N GND LA30_P LA30_N GND LA32_P LA32_N GND VADJ Evaluation Board User Guide EVAL-AD7960FMCZ 11228-029 Evaluation Board User Guide 11228-030 EVAL-AD7960FMCZ 11228-031 Figure 30. EVAL-AD7960FMCZ Evaluation Board Silkscreen—Top Assembly Figure 31. EEVAL-AD7960FMCZ Evaluation Board Silkscreen—Bottom Assembly Rev. 0 | Page 22 of 28 EVAL-AD7960FMCZ 11228-032 Evaluation Board User Guide 11228-033 Figure 32. EVAL-AD7960FMCZ Evaluation Board—Top Layer Figure 33. EVAL-AD7960FMCZ Evaluation Board Layer 2—Ground Rev. 0 | Page 23 of 28 Evaluation Board User Guide 11228-034 EVAL-AD7960FMCZ 11228-034 Figure 34. EVAL-AD7960FMCZ Evaluation Board Layer 3—Power Figure 35. EVAL-AD7960FMCZ Evaluation Board Bottom Layer Rev. 0 | Page 24 of 28 Evaluation Board User Guide EVAL-AD7960FMCZ BILL OF MATERIALS Table 4. Name U1 Manufacturer Analog Devices Part Number AD7960BCPZ Stock Code AD7960BCPZ U2 Part Description 18-bit, 5 MSPS, PulSAR differential ADC Step-down regulator Analog Devices ADP2300AUJZ ADP2300AUJZ U3 Adjustable LDO regulator Analog Devices ADP124CPZ-1.8 ADP124ACPZ-1.8-R7 U4 Op amp Analog Devices AD8031ARZ AD8031ARZ U5 Voltage reference Analog Devices ADR4550BRZ ADR4550BRZ U7 Microchip Technology Analog Devices 24LC02B-I/SN FEC 1196818 U8 IC, EEPROM serial 2K, 24LC02, SOIC8 Voltage reference ADR4540BRZ ADR4540BRZ U9 IC translator, dual 4-bit, 16-DQFN FXL4TD245BQX U10 ADP7104ACPZ-5.0 Digi-Key FXL4TD245BQXCT-ND ADP7104ACPZ-5.0-R7 U11 Linear regulator ADJ, 20 V, 300 mA, ultralow noise, CMOS Op amp Fairchild Semiconductor Analog Devices Analog Devices AD8031ARZ AD8031ARZ U12 Adjustable LDO regulator Analog Devices ADP124ACPZ-1.8 ADP124ACPZ-1.8-R7 U13 Voltage reference Analog Devices ADR4520BRZ ADR4520BRZ U14 Differential ADC driver Analog Devices ADA4932-1 ADA4932-1YCPZ-R2 U15 Low noise, high speed amplifier for 16-bit systems Low noise, high speed amplifier for 16-bit systems Single INV Analog Devices ADA4899-1 ADA4899-1YRDZ Analog Devices ADA4899-1 ADA4899-1YRDZ Fairchild NC7S04 FEC 1013809 Linear regulator ADJ, 20 V, 300 mA, ultralow noise, CMOS Capacitor, 0805, 10 µF, 16 V, 10% Analog Devices ADP7102ACPZ ADP7102ACPZ-R7 Murata FEC 1845747 MLCC, 0603, X7R, 50 V, 0.1 µF, 10% Multicomp GRM219R61C106KA73D MCCA000255 FEC 1759122 Capacitor, ceramic, 1 µF, 10 V, X7R, 0603, 10% Capacitor, ceramic, 2.2 µF, 16 V, X7R, 0805, 10% Capacitor, ceramic, 4.7 µF, 16 V, X7R, 0805, 10% SMD capacitor, 10% TAIYO YUDEN LMK107B7105KA-T FEC 1683674 TAIYO YUDEN EMK212B7225KG-T FEC 1683654 TAIYO YUDEN EMK212B7475KG-T FEC 1853520 TAIYO YUDEN – Do not place Murata FEC 1294646 Multicomp LLL216R71E104MA01 L MCCA000201 FEC 1759063 Kemet C0805C104K5RACTU FEC 1414664 TDK C3216X7R1C106M FEC 1844317 YAGEO (Phycomp) CC0603KRX7R9BB101 FEC 722110 U16 U17 U18 C1, C4, C8, C11, C16, C18, C19, C29, C42, C44, C60, C62 C2, C3, C5, C6, C7, C9, C10, C12, C15, C17, C20, C27, C28, C31, C35, C40, C41, C43, C45, C46, C52, C54, C56 to 59, C61 C14, C30 C21, C23 C34, C36 to 38, C63, C64, C69, C70 C22, C24 to 26, C47, C50, C51, C53, C55 C41, C45 C48, C49 C66 C71 C76, C77 Capacitor, 0508, 0.1 µF, 25 V, X7R, ± 20% MLCC, 0603, NP0, 50 V, 56 pF, 5% Capacitor, 0805, 0.1 µF, 50 V, X7R, 10% Capacitor, ceramic, 10 µF, 16 V, X7R, 1206, 10% Capacitor, 0603, 100 pF, 50 V, 10% Rev. 0 | Page 25 of 28 EVAL-AD7960FMCZ Name D3 Evaluation Board User Guide Part Description Diode Schottky 30 V, 1A, PWRDI-323 Resistor, 0402, 100 R ,0.0625 W, 1% SMD resistor, 0 R, 1% Manufacturer Diodes, Inc Part Number PD3S130L Multicomp MC 0.0625W 0402 1% 100R MC 0.063W 0603 0R Resistor, 0603, 16K9, 1% Multicomp R7, R9, R13, R14, R16, R17, R22, R24, R39 R37, R41 Resistor, 0805, 0R0, 0.1 W, 1% Multicomp Resistor, 0603, 1K ,0.063, 1% Multicomp R11 Resistor, 0603, 35.7K, 1% Multicomp R18 SMD resistor, 57.6K, 0% R19 R1, R2 R4, R7, R9, R10, R12, R15, R20, R21, R24, R26 to 30, R35, R48, R50, R51, R59, R60 R6 Multicomp Stock Code Digi-Key PD3S130LDITR-ND FEC 1358015 FEC 9331662 MC 0.063W 0603 1% 16K9 MC 0.1W 0805 0R FEC 1170908 FEC 9330380 Multicomp MC 0.063W 0603 1% 1K MC 0.063W 0603 1% 35K7 MCTC0525B5762T5E Resistor, 0805, 12.1 K, 1% Vishay Draloric CRCW080512K1FKEA FEC 1469866 R31 to R34 Resistor, 0402, 62.5MW, 0 R, 1% Multicomp MC 0.063W 0603 0R FEC 1357983 R36 Resistor, surge, 0805, 1%, 1 M Panasonic ERJP06F1004V FEC 1750796 R23, R25, R38, R40, R45, 54 to 56 SMD resistor, 1% N/A N/A Do not place R42 to 44, R49 Resistor, 499R, 0603, 0.1%, 0.1W Panasonic ERA3AEB4990V FEC 1810089 R52, R53 Resistor, 0805 33 R, 0.1% TE Connectivity CPF0805B33RE1 FEC 1697410 R57, R58 Resistor, 0603, 820 R, 0.1%, 0.1 W Panasonic ERA3AEB821V FEC 1811397 Rev. 0 | Page 26 of 28 FEC 9333681 FEC 1170942 FEC 1575988 Evaluation Board User Guide EVAL-AD7960FMCZ RELATED LINKS Resource AD7960 ADA4899-1 ADA4897-1 ADA4932-1 AD8031 ADP7102/ADP7104 ADP2300 ADR4520/ADR4540/ADR4550 ADP124 Description Data Sheet, 18-Bit, 5 MSPS PulSAR® Differential ADC Product Page, ADA4899-1, Unity Gain Stable, Ultralow Distortion 1 nV/√Hz Voltage Noise, High Speed Op Amp Product Page, ADA4897-1, 1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers Product Page, ADA4932-1, Low Power Differential ADC Driver Product Page, AD8031, 2.7 V, 800 μA, 80 MHz Rail-to-Rail I/O Amplifiers Product Page, ADP7102/ADP7104, 20 V, 300 mA/500 mA, Low Noise, CMOS LDO Product Page, ADP2300, 1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator Product Page, ADR4520/ADR4540/ADR4550, Ultralow Noise, High Accuracy Voltage References Product Page, ADP124, 5.5 V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulators Rev. 0 | Page 27 of 28 EVAL-AD7960FMCZ Evaluation Board User Guide NOTES I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. 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Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG11228-0-8/13(0) Rev. 0 | Page 28 of 28