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ADS1291: Using different AFEs for PPG and ECG aquisition

Part Number: ADS1291
Other Parts Discussed in Thread: AFE4403, AFE4950, AFE4404, ADS1292


I am wondering if it is possible to use different AFEs for ECG and PPG.

Like ADS1291 for ECG

and AFE4403 for PPG

Also how can we get synchronised data? Like ECG and PPG at the same time?

Will there be any sync issues?