EQUIVALENT ESR value of and ADC

[MARTIN FR]

Hello Everyone,

I am trying to monitor my battery voltage on the analog pin (ADC) so inorder to do that i am going to use the voltage divider circuit to calcualte the R1 adn R2 values i needed the ESR value of ADC pin could anyone tell me where can i find or what is the ESR value of an ADC pin? any suggestions or ideas would be really helpful

Thank you

[MartinBL]

Hi.

Input impedance for nRF51 can be found in the reference manual and in this thread. Input resistance for nRF52 can be found on the infocenter.

There is also this blog talking about battery voltage measurement and plenty of Q&As on devzone regarding various issues around the topic.