https://devzone.nordicsemi.com/f/nordic-q-a/1923/nrf51822-adc-pin-internal-resistanceHi. I am looking for the internal resistance of the ADC pin of my nrf51822. I have looked at the Product Specifications (as well as the Reference Manual and other documents just in case...) but didn&#39;t manage to find it :( . I saw typical values for otheren-USTelligent Community 13Wed, 19 Mar 2014 12:45:42 GMThttps://devzone.nordicsemi.com/thread/8257?ContentTypeID=1Wed, 19 Mar 2014 12:45:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2f471724-db0a-498b-8ec6-e9930f0cc03dH&#229;kon Alseth<p>Hi,</p> <p>Here&#39;s the impedances based on the different configurations: <a href="https://devzone.nordicsemi.com/index.php/nrf51822,-what-is-the-input-current-impedance#reply-1810">devzone.nordicsemi.com/.../nrf51822,-what-is-the-input-current-impedance</a></p> <p>Another colleague of mine has posted a in-depth answer regarding other factors to think about when using the ADC here: <a href="https://devzone.nordicsemi.com/index.php/adc-reference-selection-nrf51822#reply-3547">devzone.nordicsemi.com/.../adc-reference-selection-nrf51822</a></p> <p>Best regards Håkon</p><div style="clear:both;"></div>