Hello,
1. I observe the same issue with self-calibration of no value being written to ADC1_CAL after calibration completes successfully (CAL bit clears and CALF bit is not set). However some value getting written to ADC1_R0. This happens when VBGH/VBGL is selected as voltage reference, but if VREFH/VREFL with all other settings being the same, the calibration gives results in the ADC1_CAL. In the first case where VBGH/VBHL is selected and calibration does not have any results, subsequent conversions seem to have significant offset from the true value. Any suggestions?
2. I need ADC performance/accuracy characterization with internal bandgap used as voltage reference. How can I get that data?
