https://devzone.nordicsemi.com/f/nordic-q-a/53876/help-my-to-identify-short-current-spikes-40hz-in-low-power-modeI&#39;am achieving lowest power consumption in connected mode. I can&#39;t identify source of short spikes every 40Hz when mcu is in low power mode. I&#39;am sure that it&#39;s not application interrupt (i have checked that these spikes doesn&#39;t cause mcu to wakeup),en-USTelligent Community 13Fri, 01 Nov 2019 06:50:06 GMThttps://devzone.nordicsemi.com/thread/217879?ContentTypeID=1Fri, 01 Nov 2019 06:50:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:09b271ac-397a-48c5-b57f-67f34bf2629bbjorn-spockeli<p>Yes, its important to take these into account when using DMMs.&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/217819?ContentTypeID=1Thu, 31 Oct 2019 15:56:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54a62823-52f9-421b-b611-6e13dafc9b57Tomas Mickus<p>Thanks, these 40Hz spikes made my multimeter ac current measurements go crazy (trap for young players :) ).&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/217759?ContentTypeID=1Thu, 31 Oct 2019 12:27:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4241e3f8-d80c-4323-9266-5fce21dcd433bjorn-spockeli<p>Hi Tomas,&nbsp;</p> <p>these spikes are most likely the LDO and/or DCDC on the nRF52832 operating in refresh mode, see&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/14210/current-spikes-when-dcdc-is-on/54282#54282">https://devzone.nordicsemi.com/f/nordic-q-a/14210/current-spikes-when-dcdc-is-on/54282#54282</a>.&nbsp;</p> <p>This is the expected behavior when the device is in Ultra low power mode.&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>