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ADS131M02: How to get the ADC data?

Kevin Zeng
Intellectual 1260 points
Part Number: ADS131M02

Hi Team,

I want to ask a question that when I use ADS131M02 ADC with setting 24 bits length data, I want to read the register data if I need to send 24*6 clock to read it? Thanks.

  • +1
    TI__Mastermind 21115 points

    Hi Kevin,

    as shown in figure 8-18 in the ADS131M02 datasheet, you would at least have to send 3x 24 clocks to read the conversion data of the two ADC channels.
    The first 24 bit for clocking out the RESPONSE word and then two 24 bit words for clocking out the conversion data. You can take CSn high after the third 24-bit word if you don't care about the CRC word.

    If you want to read register data, then the number of SPI clocks depends on how many registers you want to read.
    If you want to read n>=2 registers, then you need (n+1) x 24 clocks to read all n registers (if you don't care about the CRC word).

    Regards,
    Joachim Wuerker