The effect of C9 capacitor on the power consumption of nRF52832 chip

[Roland]

We found that when testing the nRF52832 chip, if the C9 capacitor is empty, the chip broadcast power consumption increases from 20uA to 40uA, and the power consumption of the open serial port increases from 1.2mA to 12mA, but this does not happen on the nRf52810 chip. What is the reason for this difference?

[Priyanka]

Hi Roland,

Are you using the PPK to measure the current? Removing the capacitor is not usually recommended as it is part of the reference design and unless you are sure about what you are doing, it's best to not remove it. Also, as I mentioned earlier, removing the capacitor can cause lot of jitters and this can cause the peak current to increase drastically and maybe the measurement equipment is not able follow and gives wrong readings.

-Priyanka