nRF52832 drawing high current (0.1 mA) in system off mode

RE: nRF52832 drawing high current (0.1 mA) in system off mode

Håkon Alseth — Mon, 07 Mar 2022 09:41:41 GMT

Which nRF52 board specifically are you testing on? If there's other sensors on the board, they will add to the overall current consumption, and any GPIOs connected to the sensor(s) should be in a defined state, either pulled to idle via. the internal pull-resistors, or externally.

Kind regards,

Håkon

RE: nRF52832 drawing high current (0.1 mA) in system off mode

antarctic — Mon, 07 Mar 2022 09:11:09 GMT

Hello,

I should have specified that my multimeter also has a uA option, and that the reading is usually around 106-112 uA. I'll try adding the delay in future tests.

RE: nRF52832 drawing high current (0.1 mA) in system off mode

Håkon Alseth — Mon, 07 Mar 2022 09:02:19 GMT

Hi,

[quote user=""]

int main(void){
NRF_POWER->SYSTEMOFF = 1;

for(;;){}
}

[/quote]

Just an fyi: I usually add a delay of around 1 second, so that I can see when the device wakes up, based on the current consumption. Just for visualization reasons.

[quote user=""]I downloaded this to my board, disconnected it from USB, and connected it to a battery with a multimeter. The current reading gives 0.1 mA, but the nRF52832 spec says that system off mode is supposed to yield a current consumption of 300 nA. [/quote]

Which multimeter do you use? Do you have one that has a bit of a better resolution (ie. < 100 uA) ?

Kind regards,

Håkon