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ADS1298R: ADS1298R vs ADS1299 for ECG

Alwyn DSouza
Intellectual 360 points
Part Number: ADS1298R
Other Parts Discussed in Thread: ADS1299, , ADS1294R, ADS1296R, ADS1296, ADS1298

The ADS1299 seems to be lower noise than the ADS1298R and seems to be well suited for EEG but could also be used for EMG/ ECG.

The ADS1298R seems to be well suited for ECG.

When I skim through the datasheet of the ADS1298R I find quite a bit of ECG features built into the device like WCT, Pace detection, Respiration, Augmented leads acquisition in hardware.

I don't see these in the ADS1299. 

We would have liked to have a common piece of hardware and develop around the ADS1299 to build a EEG/ECG/EMG.

I guess to get these same features as the ADS1298R in the ADS1299 would required extra hardware, correct?

Is the ADS1298R better suited for building a ECG vs the ADS1299? If so, we may have to develop 2 sets of hardware one around the ADS1298R for the ECG and one around the ADS1299 for EEG / EMG.

  • 0
    TI__Guru 51171 points
    Hi Alwyn,

    This link may help you make a decision: e2e.ti.com/.../2856804

    I agree with your assessment.

    The ADS1298R is meant to incorporate many ECG features in one chip. Any of these features can be implemented discretely, but the ADS1298R allows customers to save board space and design time.

    EEG has less features associated with it than ECG, and low noise is more of a priority - thus the ADS1299 was designed.

    I would argue that the ADS1298R is better suited for ECG due to the integrated features, however that depends on how many of the integrated features you intend to use. That being said, there's no reason that the ADS1299 cannot be used to measure ECG signals - but the features you care about will need to be implemented discretely.
  • 0 in reply to Alexander Smith
    Intellectual 360 points

    Many thanks for the explanation.

    Considering your inputs, I will stick with the fully integrated ADS1298R rather than going with discretes + ADS1299. Also the ADS1298R was designed with the ECG in mind, so its the correct chip for ECG development.

    Additional question, The ADS1298R has 8 channels, wheres a 12 lead  ECG would need 10 electrodes, can a complete 12 lead ECG be implemented with a single ADS1298R or would we need a combination of 2 chips?

    eg. 1 ADS1294R + 1 ADS1296R

  • 0 in reply to Alwyn DSouza
    TI__Guru 51171 points
    Hi Alywn,

    Two chips are necessary if you want to do 12 lead ECG and respiration. If you only want to do 12 lead ECG then just the ADS1298 can be used, otherwise the ADS1294R + ADS1296 is the way to go!

    This video covers lead derivation: training.ti.com/how-measure-ecg-analog-lead-derivation
  • 0 in reply to Alwyn DSouza
    Intellectual 360 points
    Many Thanks for your replies and your time. Highly appreciate it!