Power consumption variation nRF52

[md9981]

Hello,

we have custom boards with nRF52832 chips, which show different behaviors in low power system ON mode. The current consumption is pulsing at around 22Hz to ~34Hz with varying pulse width of 0ms to 7.5ms. The Results aren't different, if the internal DCDC converter is turned off manually or over the nrf52832 power management system. The only active component is one RTC timer set to one minute wakeup intervals.

  |\______                 |\______        _74uA - 98uA
  |       \                |       \
  |        \_              |        \
__|          \____  ...  __|         \___  _2 - 15uA

  |------|  ---------------|
  0 - 7.5ms    up to 45ms

In system OFF mode the current consumption on most of our devices is around 0.4uA. Is there anything onchip that is periodically monitoring something, without waking up the main processing unit? What could cause this behavior?

We are using the S132 Softdevice.

[haakonsh]

Hey md9981,

I'd like some more information. What application are you running and how are you measuring the current consumption?

Cheers,

Håkon.