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ADS125H02: Data and CRC-4 issue

Part Number: ADS125H02

Hi,

I'm currently working on ADS125H02 interfacing with MSP432 controller. In this the issue i'm facing is When the data is read by RDATA via SPI,

DATA IN     - 12  00  AA  00  00  00  00  00  00

DATA OUT - FF  12  00  AA  00  02  33  63  FF

Like this the values in MSB LSB and MID is changing randomly for same input 0V and for every data changes the OUT CRC-4 which is last byte remains FF only.

What will be the issue here? 

Note - for other register everything just works fine, getting respected hex values.

Please help me out with this.

Thanks in advance.

  • Hi Sai,

    What gain and reference voltage are you using for these measurements?

    And can you verify that the hex values you have shown here is what you are seeing on the actual SPI communication lines? A logic analyzer would be useful to look at the input / output on each SPI line.

    -Bryan