https://devzone.nordicsemi.com/f/nordic-q-a/14396/equivalent-esr-value-of-and-adcHello 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 canen-USTelligent Community 13Thu, 09 Jun 2016 10:59:47 GMThttps://devzone.nordicsemi.com/thread/54965?ContentTypeID=1Thu, 09 Jun 2016 10:59:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bfe1c979-8869-4b6e-a401-120f437774ccMartinBL<p>Hi.</p> <p>Input impedance for nRF51 can be found in the reference manual and in <a href="https://devzone.nordicsemi.com/question/1782/nrf51822-what-is-the-input-currentimpedance/">this thread</a>. Input resistance for nRF52 can be found on the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.0/saadc.html?cp=2_2_0_35_11#unique_1704157267">infocenter</a>.</p> <p>There is also <a href="https://devzone.nordicsemi.com/blogs/943/measuring-lithium-battery-voltage-with-nrf52/"> this blog</a> talking about battery voltage measurement and <a href="https://devzone.nordicsemi.com/questions/scope:all/sort:relevance-desc/page:1/query:battery/">plenty of Q&amp;As</a> on devzone regarding various issues around the topic.</p><div style="clear:both;"></div>