nRF52833 5V to ADC input

[ivnn]

Hi!
What is the top voltage for the ADC input channel of nRF52833, according to the docs it's could be up to VDD (if nRF52833 powered from 5V)?

[Vidar Berg]

Hello,

The input must not exceed VDD + 0.3 V, see Absolute maximum ratings. And the max. recommended VDD (is not the same as VDDH) voltage is 3.6. One option is to use add a voltage divider as suggested in this post: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/measuring-lithium-battery-voltage-with-nrf52

Best regards,

Vidar