Perhaps you are looking for accurate data from the ADC -- and you may not be able to get it. It's already about 1pF and 100K impedance. You should look at the ADC section in the RP2040 datasheet. See the ENOB and then browse the various threads on this forum about the ADC.
Statistics: Posted by katak255 — Wed Jul 17, 2024 1:19 pm
