Power consumption - DWM3001C

[Braxatoris]

Hello guys,

Im developing RTLS with DWM3001C and right now Im working on personal tag powered by CR2450. So naturally, power consumption should be as low as possible.

So far I managed it to these levels - idle not moving - around 15-20 uA, after moving tag UWB TX is around 22-30 mA spike, and periodically there are every 100ms spikes of 60 uA +/- from accelerometer sampling.

Over past year, i tried everything possible but this is as low as it gets... from what i read it should be able to go 5 uA +/- ? 

Any help will be appreciated :) 

IDLE consuption 

Pinging

[Simonr]

Hi

The idle power consumption here looks very noisy on your end, so can you share some details on how exactly you measure current here. Are you able to recreate the same consumption on a development kit with a similar application on it. 

What device are you using for current consumption measurement here, and what is the accuracy of this device? Do you by chance have a Power Profiler Kit II to do current consumption measurements on? You are correct that an idle nRF52833 should be <5µA, depending on what settings you have enabled.

Best regards,

Simon

[Braxatoris]

Hello Simonr, thanks for reply !

Device for measuring is of our own making, and at its heart is sitting  INA229 chip. Here is measurement with nothing hooked in. 

Here noise is < 2 uA so it shouldnt be problem of measuring method right ? There shouldnt be anything else on board consuming power.. maybe DWM module which is in deep-sleep (+ few nA)... 

Regretably, I dont have PPK 2 at this time, so this is all i get... I didnt go to much detail of my settings and config because for past year i tried almost anything which I was able to find on internet... I have disabled everything i could... Im hoping we find some Kconfig which i didnt try or tried but didnt work ?