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ADS1260: ADS1260 DRDY not getting low

Martin Ho
Intellectual 545 points
Part Number: ADS1260

Hi,

   I am writing a driver for ADS1260. The register command reading and writing work correctly. However, after issuing "START" command, DRDY pin did not get into low level. 

Is there any reference code / suggestions for solving this problem ? I have been stuck in this problem for more than 2 weeks and checked every possible causes. Thanks a lot.

Regards,

Martin

  • 0
    TI__Mastermind 45751 points

    Hi Martin,

    Have you tried toggling the START pin to see if that works? This would indicate some issue with the START command, or maybe the timing.

    If this does not work, then there is likely a hardware issue. This could be drooping supplies, a poor layout/ground scheme, intermittent clocking, etc.

    Would you be willing to share your schematic? If you do not want to share this document in a public forum, you may request me as a friend by clicking on my name. Then we can share information via private message.

    -Bryan

  • 0 in reply to Bryan Lizon86
    Intellectual 545 points

    Hi Bryan,

        I tried toggling the START pin and it did not work. I will send the schematics. Could you please help to check it ？ Thanks a lot.

    Martin

  • +1 in reply to Martin Ho
    TI__Mastermind 45751 points

    Hi Martin,

    You should be able to get DRDY to toggle using the START pin without even having to write any registers. If you powerup the device and toggle START per the datasheet, DRDY should transition.

    This suggests some analog issue. I will review the schematic when you send it out.

    -Bryan

  • 0 in reply to Bryan Lizon86
    Intellectual 545 points

    Hi Bryan,

        I double checked the hardware and found that the AVDD did not work well. After fixing that , the START pin toggling works. Then the START command works. Thanks a lot for your great support. I focused too much on the software side before ...

    Martin