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?
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.
Thank you, Karthikeyan!
Now it's much clear for me.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.