• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 48 subscribers
  • Views 759 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.

ADS1292R: RLD circuit

PYTsai
Genius 12430 points

Part Number: ADS1292R
Other Parts Discussed in Thread: ADS1292

Hi 

We are comparing the TIDA-01614 schematics vs ADS1292R EVM schematics. 

We saw there is a difference regarding the RLD circuit 

On TIDA-01614 the RLD also connect to ELA and ERA signal as shown below. May I know why EVM no need such connection and while TIDA-01614 needs ? thanks!

  • +1
    TI__Mastermind 19815 points

    Hi,

    The connection in TIDA-01614 is optional(i.e. not necessary), it is just to provide designers additional option how they want to use/treat the RLD electrode,

    1. The EVM design or the TIDA-01614's ADS1292_RLD pin use the standard and conventional method to use the RLD electrode to bias/drive on to subject under measurement(SUM).

    2. The  TIDA-01614's RLD1 is optional and it's usually for the case that designers don't want to use/have extra RLD electrode to drive/bias the subject under measurement, so it provides option to connect the RLD1 directly to the signal input pins to somewhat/approximately achieve the RLD bias, but not on to the SUM, but to the ECG input pins/channel.

    Typically, method 1 is preferred. 

    Thanks