Re: Determine the size of the frontend sampling capacitor in
Thanks for the note, are you talking about the cap matching for the MDAC in the pipelinen architecture? I think that will casue interstage gain error, but I think that can be corrected by digital calibration.
From the overall noise calculation, the sampling capacitor at the front end needs to be at least 3pf to suppress the noise below 12-bit level. Does the size of the capacitor sound right to you? Please let me know.