how to measure the power off current on NRF54L15

[weiliwang]

Hi nRF experts.

We are RF module manufacturer,
We are developing nRF54L15d module,
When we develop production test software, we need to test power off current,
Using the Power_off sample, on the dk board of PCB0.8.1, it is about 4.x uA, and the standard should be <1uA.
How can I measure power off current <1uA on the development board.

SDK V2.8

HW PCB 0.8.1 DK not a PDK

[runsiv]

Hi

As I understand it if you want sub 1µA you need to disable RAM retention in system OFF mode, which should not be a problem since the chip will reset upon wakeup.

From my understanding you also need to disable RAM retention Please try to add the following 4 lines directly before calling system OFF:

NRF_MEMCONF->POWER[0].RET = 0;
NRF_MEMCONF->POWER[1].RET = 0;
NRF_MEMCONF->POWER[0].RET2 = 0;
NRF_MEMCONF->POWER[1].RET2 = 0;

Regards

Runar