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ADS124S08: nDRDY Pin not monitored

Rudrappa Ketannavar
Prodigy 105 points
Part Number: ADS124S08

Hello,

We are using ADS124S08 part for interfacing with 2 wire PT1000 sensors.

As part of Reading ADC data, nDRDY pin should have been monitored. But we have left the pin floating.

Is there any other means to monitor internally the status of nDRDY.

Attached snapshot of the circuit.

  • 0
    TI__Guru** 113765 points

    Hi,

    Unfortunately there is no way to monitor the completion of the conversion by status or register setting.  There is the capability for monitoring completion of conversion on the DOUT/DRDY pin.  The downside of using this method is the DRDY is an always active output whereas the DOUT/DRDY pin is only active when CS is low.  This method is described in the ADS124S08 datasheet in section 9.5.1.4.  

    Another option is to use single conversion mode and use a timer to determine when the conversion completes based on the desire data rate.

    Best regards,

    Bob B