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ADS8689: sampling data

Zeming Kong
Expert 3515 points
Part Number: ADS8689


Hi team,

How to read the sampling data? I cannot find any register for it.

Does it mean read command is not needed for sampling data? 

Could you please give an example on how to use this device? 

Best,
Zeming

  • 0
    TI__Mastermind 46095 points

    Hi Zeming,

    There is no command to read the conversion data. The data or content in the data transfer frame depends on if the data flags are enabled in DATAOUT_CTL_REG register. Please check the table 7-6 and 7-7 for output data word in the ADS8689 data sheet.

    Below is an example, NOP (no operation, all 0s) is sent to the ADC via SDI, only the flag of Parity bits is enabled in DATAOUT_CTL_REG register. The ADC output:  0xA686 is the conversion data which is output in the first 16 SCLKs, the 11b in the following 0xC are the parity bits.

    Let me know if you have any other questions.

    Regards,

    Dale