those ADC spikes were interesting
"The DNL excursions in the RP2040’s ADC are caused by the binary-weighted capacitors for the nine least significant bits being approximately 0.8% too large. The 3rd most significant bit is about 0.85% too small." https://pico-adc.markomo.me/INL-DNL/#why-does-the-dnl-spike
I wasn't aware that capacitors were part of the SAR, I thought they all used resistors, apparently either or both are used?
. I guess you'd have to calibrate the linearity any time you used one of these, even if it wasn't as far off as this silicon
those ADC spikes were interesting
https://www.hackster.io/news/raspberry-pi-confirms-it-is-investigating-a-flaw-in-the-raspberry-pi-pico-rp2040-adc-95c393b55dfb
*"The DNL excursions in the RP2040’s ADC are caused by the binary-weighted capacitors for the nine least significant bits being approximately 0.8% too large. The 3rd most significant bit is about 0.85% too small."*
https://pico-adc.markomo.me/INL-DNL/#why-does-the-dnl-spike
I wasn't aware that capacitors were part of the SAR, I thought they all used resistors, apparently either or both are used?
.
I guess you'd have to calibrate the linearity any time you used one of these, even if it wasn't as far off as this silicon
(post is archived)