Rigado BMD-340 - NRF52840 sleep current

[VECA_LV]

Hi,

I'm trying to get my NRF52840 to minimum current in sleep, but got stuck around 440 uA. Reading through the various posts about sleep current for this type of device, the sleep current should be around 120 uA, which is 4x lower than what I obtain.

I already tried to turn of modules in the config file, without result.

Is there something I can change in the config file in order to go to a lower current?

The main loop just has

__WFE();
NRF_POWER->SYSTEMOFF = 1;

Here my config file:

sdk_config.h

[Simonr]

Hi

Do you have a DK available? You could flash the application to the DK and measure the current to see if it yields a similar result to what your custom chip is, to see if this is hardware or software-related. You can see how to measure current consumption on a DK in the DK user guide (chapter 9).

Also, how are you measuring the current on your device? Are you using the PPK, a power analyzer, or something else?

Best regards,

Simon

[VECA_LV]

Hi Simon, yes we have a DK and plan to run the application on it to compare power consumption

The current is measured with a true RMS amperemeter, in series with the batteries. We have clear steady-state situations, where the device is awake (drawing 7.5 mA) and in sleep mode (950 uA)