Hello we have some problems using the ADS1292R deveopment kit and currently develop our own circuit. We are using active electrodes and facing a few signal quality problems, maybe you could advice us regarding registers and external parts.
more detailed:
Since I am using capacitive sensors, I am assuming that AC Lead-off detection is more suitable than DC Lead-off detection?
Does Lead-off detection influence an ECG signal quality?
How do you decide on the PGA chop frequency? I just went with the lowest frequency, i.e. fMOD / 16.
Could you please give me advice on the right register settings for respiration measurement on channel 1? Somehow even with normal electrodes, i.e. Ag/AgCl, my respiration measurement is incorrect. Jumping from 30 to 70 and rarely to 19-20, which is close to the truth.
Could you advise me on the right settings for the RLD in RLDSENS register? Should I have it turned on for both channels or only for channel 2, where I am measuring an ECG signal? Should both positive and negative inputs be on or only one of them?
Since each Left and Right Electrode go to channel 1 and channel 2(page 51, slau384a.pdf), I am assuming that LOFF1N + LOFF1P set to 1, should be enough to detect if the electrodes are properly connected?
Why does respiration detection make the signal a lot noisier? (tested with Ag/AgCL Electrodes, with EPIC electrodes the signal is too bad)
Which Respiration control frequency should I choose and why?
Questions to the Dev. Kit Board Schematics:
The way channel 1 is terminated in ADS1292R Dev Kit, page 51 of slau384a.pdf, I am assuming that I can only measure Respiration on it?
