I’ve been measuring current consumption of nRF52840-DK with the Otii. I measured with both inputs, the main terminal (Arc Main Current) and the ADC input (Arch ADC Current) with 3.9 ohm shunt resistor at same time, i.e. I used both inputs to measure current of the whole board.
When both inputs were connected I got about 10uA lower figures with ADC compared to main input. This one I understand since the ADC has lower sampling rate and it might miss some current spikes compared to main input. Is this right conclusion?
But I also notice that the figures from the main input were about 8uA (avg) bigger when the ADC± inputs where connected compared to figures when ADC wires were removed (I would say that these were closer to true values). Any ideas what could explain this phenomenon?