i am right now working on the Nucleo L476 RG Board. I generated source code with STM32CubeMX (v4.25). I am using the internal opamp in "Follower" mode and reading the output with the on-board adc. VCC is 3.3 V.
When applying different voltage levels to the input of the internal opamp i have seen that the opamp output never goes below 1.4 V even when i directly short the input to GND. Above 1.4 V everything works like expected.
Does anyone have a clue what is going wrong/missing in the code to make it work over the full spectrum?
Thank you and best regards,