Hi, I am developing firmware to run on a custom board using the nRF52810-CAAA chip. I need to meet very strict lower power consumption thresholds, and need to very precisely measure the power consumption. I am able to do so using the PPK which is very convenient and straightforward. However, does the PPK only measure current being drawn by the nRF52810-CAAA or does it measure current being drawn by the entire board? In more clarity, does the PPK measure current leaving the power supply or does it measure current entering the nRF52810-CAAA? I have some peripheral circuitry that drives/conditions various sensors, and I would like to profile the power consumption of the entire board (current leaving the power supply to all parts of the board, not just entering the nRF52810-CAAA). This is especially important in sleep mode. I want to ensure that if my PPK says my device is drawing 1.5uA in sleep mode, this means the entire board is cumulatively drawing 1.5uA. If the chip was drawing 1.5uA but the rest of the electronics are still drawing 10uA+ on top of that, this would be a problem I need to be aware of.
If the PPK does in fact measure complete power consumption of an entire board, not just current drawn by the chip, that is awesome. If not, does anyone have a recommendation for a really precise low-current ammeter?
Cheers!
