52840 LPCOMP power consumption with internal ref ladder

RE: 52840 LPCOMP power consumption with internal ref ladder

run_ar — Tue, 17 Aug 2021 07:00:51 GMT

yeah, I am sorry for the confusion. Added the power consumption for system off mode to my original answer. In system on mode the power domain that is enabled together with LPCOMP is drawing most of the current.

RE: 52840 LPCOMP power consumption with internal ref ladder

Namklak — Fri, 13 Aug 2021 21:23:13 GMT

So yea, the spec as mentioned above states less than 1uA. But typical is 20uA? That's over an order of magnitude discrepancy... But hey, what's a few 10s of uA amongst friends...

RE: 52840 LPCOMP power consumption with internal ref ladder

run_ar — Fri, 13 Aug 2021 11:42:57 GMT

Hi,

You can find the power consumption for LPCOMP on nRF52840 in sleep (system_off) here: Sleep

I_{OFF_RAMOFF_LPCOMP}

System OFF, no RAM retention, wake on LPCOMP

0.86

µA

The typical consumption while active seems to be ~20µa: https://devzone.nordicsemi.com/f/nordic-q-a/42874/nrf52840-sleep-system-on-wake-on-lpcomp---unexpectedly-high-power-consumption

The case you linked to was for the nRF53 series, so not really comparable to the nRF52840