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A. Arrants 1

Quick Start Guide for testing the

AD6641 Customer Evaluation Board

With the HSC-ADC-EVALCZ

Figure 1: AD6641 ADC Evaluation Board – HSC ADC EVALC Data Capture Board

Equipment Needed

► Analog signal source and antialiasing filter

► Analog Clock Source

► PC running Windows XP or Vista

► USB 2.0 port recommended (USB 1.1-compatible)

► AD6641 evaluation board

► HSC-ADC-EVALCZ FPGA Based Data Capture Kit

Documents Needed

► AD6641 Datasheet

► HSC-ADC-EVALCZ FPGA Based Data Capture Kit Datasheet

► VisualAnalog User Manual

► High Speed ADC SPI Control Software User Manual, AN-878

► Interface to High Speed ADC via SPI Control Port User Manual, AN-877

Summary of content (6 pages)

PAGE 1
Quick Start Guide for testing the AD6641 Customer Evaluation Board With the HSC-ADC-EVALCZ Figure 1: AD6641 ADC Evaluation Board – HSC ADC EVALC Data Capture Board Equipment Needed ► Analog signal source and antialiasing filter ► Analog Clock Source ► PC running Windows XP or Vista ► USB 2.0 port recommended (USB 1.
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Software Needed (place attached files in directories listed below) ► VisualAnalog version 1.9.13.2 or higher o AD6641_FFT_FIFO.vac canvas for VisualAnalog located at “C:\Program Files\Analog Devices\VisualAnalog\Templates” ► SPIController version 1.0.57.3 or higher o AD6641_12Bit_500MSspiR03.cfg and AD6641_12Bit_500MSspiR03.cal located at “C:\ProgramData\Analog Devices\SPIController\Cfgs” for Vista or “C:\Documents and Settings\All Users\Application Data\Analog Devices\SPIController\Cfgs” for Windows XP.
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tab, in the Output Data dialog box, set the Length to 16384. On the Device tab, set Output Mode to SDR and select Output Port to be SPORT. A.
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10. Start the SPI Controller software. If prompted for a configuration file, select the AD6641_12Bit_500MSspiR03.cfg file. If not, check the title bar of the window to see which configuration is loaded. If necessary, choose “Cfg Open” from the “File” menu and select the above configuration file. Note that the CHIP ID(1) field may be filled whether the correct SPI Controller configuration file is loaded or not.
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Troubleshooting ► The FFT plot appears abnormal...  If you see a normal noise floor when you disconnect the signal generator from the analog input, be sure you are not overdriving the ADC. Reduce input level if necessary.  In VisualAnalog, Click on the Settings button in the “Input Formatter” block. Check that “Number Format” is set to the correct encoding (offset binary by default). Repeat for the other channel.  If DC Spurs appear in the “FFT” plot from VisualAnalog? See Figure 2.
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Figure 3: Power supply modification to SPU15A-103 switching power supply. Otherwise, email the HSC Applications Group at highspeed.converters@analog.com and ask for Part Number: EPS060250UH-P5P-SZ, CUI Inc. switching power supply. This switching power supply has a ferrite core built into the DC lead to snub any switching noise. ► The FFT plot appears normal, but performance is poor.  Make sure you are using an appropriate filter on the analog input.