Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 489 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1246: CC2530

Lee Jasper
Prodigy 85 points
Part Number: ADS1246

Hi,

Would you please help to review ADS1246 circuit?

thanks 

regards

  • 0
    TI__Guru 51051 points

    Hi Lee,

    Apologies for the delay in response. 

    Looks like you've configured the device for continuous conversions, internal clock, and will collect data using the combined DOUT/DRDY pin.

    I would recommend decreasing the size of the common-mode capacitors C49, C47, by 10x such that they are 10x smaller than the differential capacitor C57.

    I would recommend reviewing section 9.3.2.2 PGA Common-Mode Voltage Calculation Example of the datasheet. I see that you are using bipolar 2.5V supplies. Tying the positive input to 2.5V via R2 will result in a common-mode voltage violation.