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ADC input protection proposal

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arestechfinland
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Joined: 2020-06-04 17:15
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ADC input protection proposal

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?