I managed to brake STM32 MCU by over or under voltage to ADC input. I had jumper wires connected to ADC, 3.3V and GND. Touching ADC with soldering station tip broke the MCU.
After the damage I checked the schematic and noticed that there is not any protection for ESD or over-/undervoltage transients.
Would it be possible to add something to next hardware versions? For example zener-diodes and some TVS?