Hello!
In application notes for ADS1298 (link: http://www.ti.com/lit/an/sbaa160a/sbaa160a.pdf p.5, 2nd paragraph from the bottom) I've read the following information: "The dc blocking high-pass filter is eliminated as well, because the inherent noise of the ADC is significantly lower than the previous solution (Figure 2b)."
The question is how cooud the ADC inherent noise influence on the DC baseline behavior?
Hello
The ADC noise does not influence the DC baseline beahvior of the signal, but changes the way the DC signal is processed in the signal chain.
The comment on the lower noise of the ADC refers to the increased dynamic range because of the 24bits. Due to the increased dynamic range of the ADC, the DC signal is also digitized. This DC can be removed by using digital filters.
-Karthik
Thank you, Karthikeyan!
Now it's much clear for me.