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ADS7883EVM: SPI communication with another board with different GND

Part Number: ADS7883EVM
Other Parts Discussed in Thread: ADS7883


I'm trying to read data from the ADS78883 using SPI with an FPGA eval board. I power the ADS7883 with a standard DC supply while the FPGA board receives power from my PC via USB. Is this an issue in terms of ground? How should I connect the boards so that they have the same ground?

Thank you

  • Hello,
    Yes, this is an issue with the grounds. All the grounds should be connected together.
    Does the eval board the FPGA have a ground pin/test point that can be connected to the ADS7883 EVM? One wire connecting the two board grounds should close the loop.