The STM32F746G-DISCO discovery board (32F746GDISCOVERY) is a complete demonstration and development platform for STMicroelectronics ARM® Cortex®-M7 core-based STM32F746NGH6 microcontroller.

Analog inputs giving weird readings

19 Oct 2017


I have noticed a weird issue with the analog inputs on these boards (specifically A0 and A1), which seem to read much lower than they should via the ADC using a tmp36 temperature sensor.

I get realistic readings from the other pins (~ 18 degrees), but A0 and A1 give much lower readings ...

However, I can't replicate this with a potentiometer. Could it be something to do with the input impedance on those pins?