Post Go back to editing

What ADC chips (and their evaluation kits) can be used with HSC-ADC-EVALEZ to have sampling rates of 500 KSPS to 4 MSPS

Category: Hardware
Product Number: HSC-ADC-EVALEZ
Software Version: Using Matlab

I have a FPGA evaluation board, HSC-ADC-EVALEZ. I also have an evaluation board AD9684-500EBZ connected to the FPGA board.

I can capture the data from the I-Q demodulator using MATLAB codes.

I have two differential input channels and need 12 to 14 bits of resolution.

The sampling rate of AD9684-500EBZ is too high for my application. I need sampling rates of 1- 500KSPS, 2- 1000 KSPS, and 3- 4000 KSPS.

 

What ADC chip (and its evaluation board) do you suggest for my application?

 

Do we have any chip with external clock frequencies of, let’s say, 100KHz to 20 MHz to get sampling rates of from below 500 KSPS to around 20 MSPS or so?

 

With AD9684-500EBZ, I get an error when I reduce the external clock frequency below 94 MHz, so I cannot capture data at speeds lower than 94 MHz. The datasheet says the minimum clock frequency is 300 MHz, but it works as low as 94 MHz.

 

Any help is highly appreciated.

 

 

Thank you,

Iraj

Top Replies

  • Hi  

    Thanks for your interest in AD9684.

    Unfortunately, the minimum Clock Input Rate that is acceptable for ADC chip (e.g., AD9249 and AD9681) with HSC-ADC-EVALEZ is 10 MHz.

    Regards,

    Adrian

Parents Reply Children
  • Hi Adrian,

    Thank you so much for your reply. It is very helpful. Is it possible to use something like the ADC chip AD4680 with EVAL-AD738xFMCZ and connect it to HSC-ADC-EVALEZ? Will HSC-ADC-EVALEZ be able to communicate with EVAL-AD738xFMCZ using SPI? Maximum sampling rate of AD4680 is 1 MSPS.

    In my Matlab codes I use SPI to communicate with AD9684-500EBZ when it is connected to HSC-ADC-EVALEZ and then to PC via USB port. I use the following codes (I did not include other lines of codes to make it easy to read. The codes are working fine, and I correctly capture the I-Q demodulated data):

    ...

    param = HadBoardApi.HadSpiParameters(1, 0, 0);

    board.SpiInitInterface(1, param)

    ...

    Thank you,

    Iraj

  • Hi  

    EVAL-AD738xFMCZ is not compatible with HSC-ADC-EVALEZ, it uses EVAL-SDP-CH1Z. See Evaluating the EVAL-AD738xFMCZ for more information. 

    Please create a thread at Precision ADCs for additional questions about AD4680. Thank you.

    Regards,

    Adrian