• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 49 subscribers
  • Views 1168 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.

ICG measurement using ADS1292 R

rushit gandhi
Prodigy 95 points
Other Parts Discussed in Thread: CC2541, ADS1292R, ADS1191, AFE4300
We are using CC2541 & ADS 1291 for ECG measurement.
I was searching for IC for measuring impedance cardiography & found an paper which describes use of the ADS 1292 R for measuring ICG as well as ECG but cannot find any source on the TI forum about ICG measurement.
Can you please guide me the the details like analog front end for the ICG measurement using ADS1292R ?
  • 0
    TI__Mastermind 18285 points
    Rushit,

    I'm moving your post the the precision data converters forum. They are better equipped to answer questions on the ADS129x devices.
  • 0
    TI__Mastermind 38745 points
    Hey Rushit,

    I am not familiar with anyone using the ADS1292R for ICG measurement, but the device's respiration measurement functionality was designed to operate using impedance pneumography. Have you seen this paper: www.ti.com/.../sbaa181.pdf

    It would be interesting to see if it is possible to use the device for ICG. Do you know what the voltage magnitude of the signals are that you would need to measure or perhaps the magnitude of the changes in impedance that you aim to resolve?

    Regards,
    Brian Pisani
  • 0 in reply to Brian Pisani
    Prodigy 50 points

    Hello TI-Team,

    i am using the chip ADS1191 (+evaluation board) for ecg measurement. It still works but now I would like to do some additional impedance measurement.

    Therefore I have following questions:

    1) Is it possible to use the lead-off detection of the ADS 1191 to measure the body Impedance?
    2) I have allready found some documents on the forum but I do not kow if DC or AC-measurement for Lead-off detecan can handle this?
    3) One alternative would be a complex solution with another chip (e.g. AFE4300)?

    Have you got a simple solution for this problem? Can you make some suggestions for ADS1191?

    Best regards,
    Juergen

     

  • 0 in reply to user4604717
    TI__Guru**** 168605 points

    Hi Juergen,

    The ADS1191 only has simple comparator circuits for LOFF detection.  While you might be able to use various software algorithms to get more details on impedance measurements, there is nothing inherent in the ADS1191 that provides a simple solution to your application needs.

  • 0 in reply to Tom Hendrick
    Prodigy 50 points

    Hello Tom,

    thank you for your response. I understand that impedance-measurement with ADS1191 is not possible when ecg-measurement is active.
    1) You recommended an algorithm for impedance measurement. Is there a common solution available!?
    2) Would it be possible using respiration mode of ADS1292R?

    Maybe you can make some suggestions!?

    Best regards,
    Juergen

  • 0 in reply to user4604717
    TI__Guru**** 168605 points

    Hi Juergen,

    I'm not confident that the ADS1292R is going to do what you want it to do, you would be better off looking at the AFE4300 for this application.

  • 0 in reply to Tom Hendrick
    Prodigy 50 points

    Hello Tom,

    I thought that a solution without using the AFE4300 is available.
    Thank you for your fast feedback!

    Best regards,
    Juergen