3 ms·
There was also some errata related to the ADC on the 2040 chips. There are specific input values that cause resonant peaks. n The RP2040 ADC has a DNL that is
by anymouse123456 2y ago
There was also some errata related to the ADC on the 2040 chips. There are specific input values that cause resonant peaks.
n The RP2040 ADC has a DNL that is mostly flat, and below 1 LSB. However at four values — 512, 1,536, 2,560, and 3,584 — the ADC’s DNL error peaks above this value. The ENOB for the ADC has been reduced from 9-bits (simulated) to 8.7-bits (measured), see Section 4.9.3. The DNL errors will somewhat limit the performance of the ADC dependent on use case.
For the record, I love these chips, despite the problems that came up.