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ADS1118: Relationship between conversion time and DRDY( high to low) ?

Shinichi Inoue
Guru 22481 points

Part Number: ADS1118

Dear Specialists,

My customer is considering ADS1118 and has a question.

I would be grateful if you could advise.

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Could you please let me know the relationship between conversion time and DRDY status(High to Low) regarding ADS1118IDGST.

When Config Register bit 7:5 [DR2:0] is set to 000 (8 SPS).

Is it possible to think the AD conversion is updated and DOUT/DRDY changes from high to low, which is 125 ms (8 SPS).

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I appreciate your great help in advance.

Best regards,

Shinichi

  • 0
    TI__Intellectual 2340 points

    Hello Shinichi, 

    Thank you for the questions!

    The DOUT/DRDYn pin can be used to indicate that a conversion is complete and new data are available. The pin transitions low when new data are ready for retrieval. In continuous-conversion mode, DOUT/DRDYn transition high again 8us before the next data ready signal (DOUT/DRDYn low) if no data are retrieved from the device. Please see section 9.5.5 of the datasheet for more information. 



    Regards, 

    Andrew