Analog Devices AD9257 User Manual Download

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Rev 13 Nov 2013 00:23 | Page 13

Speed ADC SPI Control Software, and the

, Interfacing to High Speed ADCs

via SPI, for additional information on the available settings.

Figure

11. SPI Controller, Example ADC A Page
Click the Run or Continuous Run button in the VisualAnalog toolbar (see Figure 12).

Figure

12. Run/Continuous Run Buttons (Encircled in Red) in VisualAnalog Toolbar, Collapsed Display

Adjusting the Amplitude of the Input Signal

The next step is to adjust the amplitude of the input signal for each channel as follows:

Adjust the amplitude of the input signal so that the fundamental is at the desired level. Examine

the Fund Power reading in the left panel of the VisualAnalog Graph - AD9257 FFT window
(see Figure 13).

Summary of Contents for AD9257

Page 1: ...devices is also described Though the information on this page applies generally to the currently released version of the AD9257 65EBZ and AD9637 80EBZ the specifics i e photos jumper labels etc are fo...

Page 2: ...rive option On board LDO regulator or switching regulator needing a single external 6V 2A dc supply VisualAnalog and SPI controller software interfaces Helpful Documents AD9257 or AD9637 data sheet Hi...

Page 3: ...ard to the data capture board as shown in Figure 1 1 Connect one 6V 2 5A switching power supply such as the CUI Inc EPS060250UH PHP SZ that is 2 supplied to the AD9257 65EBZ or AD9637 80EBZ Connect on...

Page 4: ...wer supplies To do this remove the E101 E102 E104 E105 E111 E112 E113 E114 E115 and E116 ferrite beads to disconnect the bench supply traces from the on board LDOs Note that in some board configuratio...

Page 5: ...he ADC Using the SPI the PDWN pin can be configured to be STBY standby J1001 and J1002 These jumpers enable the optional ADL5565 amplifiers on Channels G and H respectively Connect pin 2 to pin 3 for...

Page 6: ...ault and optional ADC settings or modes allowed on the AD9257 65EBZ and the AD9637 80EBZ boards Power Connect the switching power supply that is supplied in the evaluation kit between a rated 100V ac...

Page 7: ...facilitate usage with higher frequency clocks When using the internal divider and a higher input clock frequency remove CR1101 to preserve the slew rate of the clock signal The AD9257 65EBZ and AD9637...

Page 8: ...Additional information on the Standalone PIN Mode is provided in the AD9257 and AD9637 data sheets Default Mode To operate the device under test DUT using the SPI follow the jumper settings for J301 a...

Page 9: ...ge To change features to settings other than the default settings click the Expand Display button 3 located on the bottom right corner of the window see Figure 5 to see what is shown in Figure 6 Chang...

Page 10: ...tware by going to the Start menu or by double clicking the 1 SPIController software desktop icon If prompted for a configuration file select the appropriate one If not check the title bar of the windo...

Page 11: ...Rev 13 Nov 2013 00 23 Page 11 Figure 7 SPI Controller CHIP ID 1 Box Click the New DUT button in the SPIController window see Figure 8 2 Figure 8 SPI Controller New DUT Button...

Page 12: ...er to the data sheet the AN 878 Application Note High Speed ADC SPI Control Software and the AN 877 Application Note Interfacing to High Speed ADCs via SPI Figure 9 SPI Controller CLOCK DIVIDE B Box F...

Page 13: ...n the VisualAnalog toolbar see Figure 12 5 Figure 12 Run Continuous Run Buttons Encircled in Red in VisualAnalog Toolbar Collapsed Display Adjusting the Amplitude of the Input Signal The next step is...

Page 14: ...ecimal will appear If the contents show 0x00 the ADC is not powered up or SPI communication is not working Check that there is correct power to the AD9257 65EBZ or AD9637 80EBZ board and to the HSC AD...

Page 15: ...isualAnalog see Figure 12 is clicked do the following Make sure that the evaluation board is securely connected to the HSC ADC EVALCZ board Make sure that the FPGA has been programmed by verifying tha...