coin cell 3V battery level monitor with nRF52840

[Balu Varkala]

Hi,

I am using the nRF52840 chip and supply iam giving from coin cell(3V). So i want to measure the coin cell voltage level monitor with nrf52840 ADC pin.

kindly provide the circuit for the same.

[Dmitry]

Hi,

you can configure ADC to measure voltage directly at VDD pin, without any external components, using an internel 0.6V reference.