ADC max input voltage?

torntrousers
Posts: 21
Joined: Mon Dec 21, 2015 9:30 am

ADC max input voltage?

Postby torntrousers » Fri Dec 09, 2016 2:21 pm

Hi, can anyone tell me the absolute maximum input voltage of the ESP32 ADC pins? I've seen a few blog posts suggesting 4.0 volts but I can't see that any any Espressif docs.

Also, does that change with the ADC attenuation setting?

Thanks!

onehorse
Posts: 70
Joined: Mon Feb 15, 2016 1:35 am

Re: ADC max input voltage?

Postby onehorse » Sun Dec 11, 2016 10:21 pm

I assumed it was 3V3, but I haven't seen it documented anywhere. But 3V3 seems consistent with my experience using in, at least on pin 34!

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