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ADS1292R: TIDA-01614

Intellectual 290 points

Replies: 9

Views: 139

Part Number: ADS1292R

Hello every one 

Could anyone explain why we need the electronics switch in TIDA-01614 , please? 

Thank you 

9 Replies

  • Expert 3270 points

    Hi Hector,

    Thank you for the post.

    According to the reference design, tt is used mainly for switching off the respiration path during the Pacemaker detection. 

    Thanks.

    -TC

  • In reply to TCT:

    Hello ; 

    Thank you; what is the purpose of switching of respiration when pacemaker detection? because of noise? could you explain, please 

  • Expert 3270 points

    In reply to Hector:

    Hi Hector,

    I have to check with the team and get back to you.

    Thanks.

    -TC

  • In reply to TCT:

    Thank you ; I wait your reply please 

  • In reply to Hector:

    Any help here please ? 

  • In reply to Hector:

    I dont know what is going on in the forum; last years we could  have better faster support . 

    I am using ads1292 in our porducts of about 15k / year .  and we have  develop the new design and we need your support.  if  here is not the correct place ; tell us where is the correct place please . 

    but its not nice to wait you. and I know prevous support was very nice and fast. 

  • Expert 3270 points

    In reply to Hector:

    Hi Hector,

    Sorry about the delay. A different team developed the reference design, and we are trying to reach out to the team to get more clarification on that specific design detail. We have seen customers using the ADS1292R with respiration shown in the datasheet without the specific transistor switch used in the reference design. The typical use case for the ADS1292R is to have respiration functionality on CH1 and ECG signal on CH2. It is out of my expertise in the complete ECG system design with a pacemaker. As described in the reference design, the transistor switch keeps the pacemaker on while the respiration is switched off every 30 seconds.

    Thanks.

    -TC

  • In reply to TCT:

    Thank you for the reply ; 

    i understand that they switch off respiration ; but I don't  understand why . Its really important for our design ; because we think respiration can influence the pacemaker circuit. so please could you confirm why they switch it off? 

    Thank you again 

  • Expert 3270 points

    In reply to Hector:

    Hi Hector,

    The ADS1292R respiration measurement circuit uses a modulated signal of 32kHz or 64kHz to measure the changes in thoracic impedance that correspond to breathing. During respiration mode, the ECG signals can still be acquired with the same electrodes used for respiration measurement. This modulated signal may interfere with the PACE signal on the ECG signal path. We will have to do a more in-depth analysis of how this modulated affects the PACE detection during respiration mode.

    Thanks.

    -TC

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