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differences between ADS1292R EVM and ADS1292 EVM

yael goldberg
Prodigy 125 points
Other Parts Discussed in Thread: ADS1292R, ADS1292, ADS1192

Hello.

 

I'm currently in possession of TI's EVM ADS1x9xECG-FE (rev A) for the ADS1292R. As far as I've gathered, this board provides me with 1 differential ECG channel and 1 Resp channel, as I can see in the provided software application. Now I wish to have 2 ECG channels to work with, and I understand it is possible to change the board manually (by adding and removing resistors and conductors) to provide 2 channels.

Yet, I wonder if it would not be easier to order the ADS1x9xECG-FE EVM for the ADS1292 (without respiration). As I understand, it provides 2 ECG channels instead of 1 EGC and 1 Resp. It might be a quicker option and less messy, and yet, I have ran into several questions I hope you can help me with:

1) I've looked into the documentation of the EVM, and yet I can't find the difference between the circuits connecting the 9 pin socket and the ADS, which should be different between the ADS1292 and the ADS1292R. (Considering the ADS1292 does not have a respiration function and so the circuit is redundant.)
http://www.ti.com/lit/ug/slau384a/slau384a.pdf (page 51)
what are the changes? Where can I find documentation of the changes?

2) Are there any other fundamental changes between the boards that would affect use and I should know about? It seems that both ADCs function the same in the ECG field and I should not have any problem adapting, yet I want to be sure I'm not missing anything.

Thank you very much for your time.

  • 0
    TI__Guru**** 176701 points
    Hi Yael,

    If you look through Appendix (B) of the ADS1x9xECG-FE Demonstration Kit User's Guide, you can see the differences between how the components are installed for the ADS1192, ADS1292 versus the ADS1292R options. Schematically there is no difference in the connections to the 9-pin connector at P5. The PWB's for all three versions are exactly the same otherwise, so you are not missing anything.
  • 0 in reply to Tom Hendrick
    Prodigy 125 points

    Thank you for your answer, Tom.