How much negative voltage does the Arduino Due analog pin survive?

J-M-L
Thanks. But this is not a product. You don't have to worry.

MicroBahner
I am writing a completely imagined example. Suppose there is too much voltage on the mandrel.
Suppose the spike goes onto a multiplexer and then from there to the ADC. The ADC can withstand a maximum of 5V. But when we do not read the value of the ADC, the output of the multiplexer does not have the value of that pin. And the multiplexer can withstand more than 5V. In this case, the pin will not fail until we read more than 5V with it. But if you don't read the value, it can have a voltage higher than 5V.