https://devzone.nordicsemi.com/f/nordic-q-a/30148/adc---internal-pullHi, we are using active voltage divider as battery readout circuit. It is controlled by MCU NRF52832 pin P0.09. Voltage from divider is read by integrated SAADC on pin P0.05. Without MCU hardware works well but with MCU value on ADC is corrupted. Looksen-USTelligent Community 13Mon, 05 Feb 2018 10:55:14 GMThttps://devzone.nordicsemi.com/thread/119707?ContentTypeID=1Mon, 05 Feb 2018 10:55:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0bd421c8-287e-4ff7-8742-9e4f112fadddkerleba<p>We figured out that we had P0.09 set as NFC pin.&nbsp;Everything is working after&nbsp;changing it to GPIO.</p><div style="clear:both;"></div>