ESP32 Forum • ADC reference voltage on external pin?

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ADC reference voltage on external pin?

Posted: Thu Feb 09, 2017 5:42 am

by davidm

Is it possible to route the ADC's reference voltage (Vref) to one of the pins? If so, how? Also, what voltage is Vref set to?

Thanks!

Re: ADC reference voltage on external pin?

Posted: Tue Feb 21, 2017 9:31 am

by ESP_puff

Hi davidm,
The reference voltage for ADC is fixed to 1.1V. No other pins are allowed to use as reference voltage.

Re: ADC reference voltage on external pin?

Posted: Tue Feb 21, 2017 10:19 pm

by davidm

Thanks for the clarification!