Nordic Power Profiler Hardware understanding

[WizardAtLarge]

Reviewing the PCA63511_Schematic. On Sheet 2, looking at the nRF52832 chip

(1) What is PO.05 used for? It controls the BJTs (Q1A, Q1B and Q2A) which clamps the input to the ADC

(2) Under what conditions would a person want to cut "SB2"?

thx,

WaL

[WizardAtLarge]

Reason I am asking: it looks like a current mirror but I am not sure ... 

[AndreasF]

Hi.

P0.05 is connected to the sampling circuit to measure power on SB2.

SB2 should be cut if you want to disconnect the 32.768 kHz crystal on P0.00, this is described in further depth here. The solder brdige configuration for the nRF52832 can be found here.

- Andreas