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ADS8862: Data converters forum ADS8862

user6004427
Prodigy 30 points
Part Number: ADS8862
Other Parts Discussed in Thread: CC2530

Hello,I want to drive ADS8862 to  communicate with cc2530 recently,but I have met some problems.I sure I drive SPI successful that  they have already communicated,and I can read  some numerical value from ADS8862.But I don't know why the value from ADS8862 always varies greatly.The source analog value of ADS8862 change a little at most.Can someone provides ADS8862 SPI drive program for me to have a look,please?Thank  you!

  • 0
    TI__Mastermind 46910 points

    Hello,

    We do not have example SPI code for the ADS8862.  However, from your description, it seems like you are communicating correctly with the device.

    When you say the value varies greatly, does it read the correct value if you average many readings?  This could be due to an unsettled input on the ADC or noise on the input signal.

    Also, have you checked the SPI waveforms with an oscilloscope?  You may be getting corrupted readings due to signal integrity.

    If you could provide the schematic showing the input amplifier, reference, and ADC, I can review it.  Also, a scope capture of the SPI waveforms would be helpful as well.

    Regards,
    Keith N.
    Precision ADC Applications