https://devzone.nordicsemi.com/f/nordic-q-a/23079/ppk-calibration-sequence-questionWhen the PPK calibrates and turns off the DUT, does the nRF52832 on the PPK disconnect from the External DUT lines? My DUT has a LOT of capacitance on it, and it takes several seconds to fully discharge the caps after power has been removed. My questionen-USTelligent Community 13Wed, 28 Jun 2017 10:41:57 GMThttps://devzone.nordicsemi.com/thread/90812?ContentTypeID=1Wed, 28 Jun 2017 10:41:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ad65735-f7f4-489c-87d0-302a98dc6357wlgrd<p>The calibration should not be affected by this.</p> <p>The ADC lines are disconnected through an analog switch when the PPK asks to power off the external DUT. We haven&#39;t seen any leakage through this switch, but if the DUT for some reason will have a higher voltage than the PPK is supplying, there might be some reverse leakage.</p> <p>In your case, this will not happen.</p><div style="clear:both;"></div>