https://devzone.nordicsemi.com/f/nordic-q-a/36230/saadc-measuring-below-max-when-connected-to-vcc-when-supplied-by-3-0vHI all, I&#39;m working on the nrf52840, and I&#39;ve tested this on the devkit as well as on-board on the product I&#39;m working on. Using the saadc, if I tie my AIN line to VCC, I consistently get readings of ~853 when the supply voltage is VCC=3..0V. Theen-USTelligent Community 13Mon, 09 Jul 2018 17:59:55 GMThttps://devzone.nordicsemi.com/thread/139465?ContentTypeID=1Mon, 09 Jul 2018 17:59:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0b17ba84-f28c-4cfd-bd0d-39e1e0187c8eMaipei<p>I was being silly; I&#39;ve figured it out. after reviewing the product spec, I see that the saadc example is likely using the internal 0.6V reference and a gain of 1/6, meaning that the highest measurement would be 3.6V.</p><div style="clear:both;"></div>