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ADS1292R: ADS1292R impedace

Part Number: ADS1292R

Hi everyone ; 

Happy new years , 

We will use ADS1292R in single lead mode without RLD ; and we   need measure the impedance ( base resistor)  between 0Ohms  to 1K oHm ;  does the non use of RLD effect the performance of the  impedance channel ? 

is it possible that range from 0 to 1k ? 

what does the impedance channel readings give me ? the  voltage accross the whole pass of the imedance ( electrodes + protection resistors + base resistor) or it  give me the base resistor directly ? 

do  I need further analysis to find the base resistor ; LPF ? 

How does the imedance channel in single lead  effect the pace detection too ? 

in single lead we use  capacitors to block the DC offset with pullup to  to RLD 10M with 1uF . we noticed the settle time of the  high pass filter is about 14 seconds ; any suggestions here ? 

Thank you inadvanced ;