how to measure the power off current on NRF54L15

Question

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 · Accepted Answer

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

how to measure the power off current on NRF54L15

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