• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 315 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

DRV2700: DRV2700 generates external interference

Cherry Zhou
Mastermind 22235 points
Part Number: DRV2700

Hi Team,

Referring to the DRV2700EVM, we designed a 3-way piezoelectric ceramic driver circuit. However, I found that after DRV2700 is enabled to work, it will interfere with some other digital signals on the board, causing significant noise signals on the digital signal level, resulting in signal recognition errors. After three DRV2700 are enabled to work simultaneously, the interference is maximum, and the interference signal disappears after all are turned off. May I ask how DRV2700 generates external interference? What should be done?

Could you help check this case? Thanks.

Best Regards,

Cherry

  • 0
    TI__Genius 17960 points

    Hi Cherry,

    Are you seeing this noise on a pin of the DRV2700 or an external digital pin? The noise is likely coming from the boost on the DRV2700. Because of this high voltage switching signal you have to be very careful about how you route your digital signals and the high voltage signals from the boost on your layout. Otherwise the high voltage signals will couple on to your digital signals and cause the noise your are seeing. 

    Regards,
    Sydney Northcutt