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ADS1299: Questions about CMRR, DC suppression and Resolution.

Josh
Prodigy 40 points
Part Number: ADS1299

Hi 

Couple of questions about ADS1299.

1. How does CMRR work? Does it cancel common signals between the reference and the measurement electrode, the measurement and ground or signals that are common to all three at once? 

2. In ADS1299, does the CMRR apply to suppress the DC offset from electrodes as well or some other method is used for electrode DC offset suppression? 

3. Is it possible to increase the resolution of ADS1299 to 0.01 micro Volt using external reference while simultaneously handling the ±150-200 milli Volts electrode DC offset? Or will the ADC saturate? The resolution using the internal reference is 0.268 micro volts, probably even less because of the ENOB. (4.5V / 2 power 24 Bits)