Hello,
I need to calculate the Common Mode Rejection Ratio (CMRR) for ADS1299 and I have some questions about it. Is the CMRR measured using only DC input voltage or is there a way to measure it using AC common voltage? Which method is used on ADS1299 datasheet?
I have tried to use a 2 Hz sinusoidal signal with 2 V amplitude and I tied ADC negative and positive inputs together (figure below from TI). Then I intended to measure CMRR by dividing the input amplitude by the output amplitude. Is this correct?
Thank you!
Mateus
