Glitches on sleep mode impacting current

[fabib]

Hello,

I am using the NRF52832 for advertising every 10s.

However while entering the sleep phase, I noticed some glitches while measuring the current. You can find attached our measurements using a picoscope.

What are these glitches due to?

In addition to this, in sunlight the density of these glitches increases thus increasing the current consumption.

While including these glitches to our current measurements, the value is equal to 7µA which is quite high. Do you know if and how this current can be reduced?

,

Thank you

Fabien

[Stian Røed Hafskjold]

Hi, please see my answer in this post: https://devzone.nordicsemi.com/f/nordic-q-a/20121/periodic-current-during-waiting-event/78352#78352

The current including the spikes should be 2µA in idle mode. You are seeing 7µA, so can you please measure the distance between the spikes and also the base current between the spikes?

Can you please describe your measurement setup. Are you measuring on the PCA10040 DK? If so, are you connected with USB? This will give you about 10µA in idle because of noise. You should power the kit using the external supply pins. If you are measuring on a custom design, please describe your setup. Any other devices on the board?

You also mention sunlight.. are you using the CSP package? How much does the current increase and what is the distance between the spikes.