RE: Getting nRF9160 DK current consumption down to <10 µA

Michal R — Mon, 05 Jul 2021 10:23:59 GMT

Hello again Håkon.

I have a 1.0.0 DK and the results from other samples were not any better, but in the end I found the issue. I needed to supply the power to the rest of the DK with USB/external power supply, while Otii supplied and measured current to nRF9160 SiP.

This blog post has been extremely helpful: Getting started with current measurements on the nRF9160

I have just copied the SMU connection from there and I finally got the expected currents.

I feel like there should be added more information about the current measurements to the documentation at infocenter, especially about using power analyzers. They are mentioned in the main page here HERE, but there is no subpage about it, only about oscilloscope and current meter measurements. Maybe Stian, the author of that blog post could write some? That would be extremely helpful I think. 🙂

Thank you Håkon and Stian (kudos for that post!) for help.

Kind regards,

Michal

RE: Getting nRF9160 DK current consumption down to <10 µA

Håkon Alseth — Thu, 01 Jul 2021 13:41:34 GMT

Hi,

[quote user=""]I tested my code on two DKs, power consumption on the first one was 74 µA and 50 µA on the second one.[/quote]

It could be leakage on the DK itself. Some older versions of the DK had problems.

Which version of the DK do you have?

If you run a very simplistic sample, with no LTE modules at all, for instance zephyr/samples/basic/blinky (for board nrf9160dk_nrf9160 - note the lack of "ns" prefix here!), then set CONFIG_SERIAL=n, what do you measure then?

Kind regards,

Håkon