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Glitches filtering using RCR filter

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leejongfan

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Hi all,

I am designing a ADC circuit using ADS62P49

9123-RCRfilter.jpg


There are few things I am not clear about this analog front-end design:
- RCR filter:what is its function ? is it the same as RC filter because we can combine 2 resistors in series together ? If not, why ?
- Glitches filtering: as I know, glitches are electrical pulses. Since they are arbitrary, how do we design a filter to remove it ?
- 5Ω damping resistors: I've read few documents about damping resistors. Basically it is used to prevent overshoots current when switching. Am I right to say that due to the presence of those damping resistors, electrons will "see more impedance" moving back and forth ? But if it is the case then we will have a voltage drop, right ?

Thank you
Dennis
 
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