nRF52832, nRF5340 current consumption comparison

It is an extension of the ticket below.
devzone.nordicsemi.com/.../nrf5340-current-consumption-issues
I'd like to find out what causes the huge difference in current consumption on the two boards.

An online power profiler (OPP) was used to estimate the radio current, and PPK2 was used to measure the actual current consumption of the board.

<52832>




OPP: 77uA
Measurements: 72.23 uA
Measurement_base: 3.04 uA

<5340>




OPP: 56uA
Measurements: 85.87 uA
Measurement_base: 6.76 uA

OPP simulations suggest that the 5340 will have lower current consumption, but measurements do not.
Comparing the currents over one connection interval clearly shows the difference. Both radio/idle the 5340 has high current consumption.

<52832>



Interval (60 ms): 70.28 uA
Peak (5 ms): 809.6 uA
Base (55 ms): 3.06 uA

<5340>



Interval: 78.53 uA
Peak: 870.45 uA
Base: 6.54 uA

I'd like to know where this difference comes from.
Is it simply because the 5340 has two cores?
52832, IDDFLASHCACHEDCDC: 3.7 mA
5340, IAPPCPU3 + INETCPU2: 3.6 mA + 2.6 mA = 6.2 mA

I tried to compare the current consumption of the two mcu peripherals in the datasheet, but the 5340 doesn't provide enough information. (gpiote, pof...)
I want to make sure I've achieved sufficient current optimization.

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  • Hi John,

    I would like to think the Online Power Profiler has already taken into account the consumption of both cores.

    I have asked internally on what could be going on here and will update you when I get feedback.

    Meanwhile, may I ask if you have performed power optimization of both the nRF52832 and nRF5340 to the same degree in your tests?

    Hieu

Reply
  • Hi John,

    I would like to think the Online Power Profiler has already taken into account the consumption of both cores.

    I have asked internally on what could be going on here and will update you when I get feedback.

    Meanwhile, may I ask if you have performed power optimization of both the nRF52832 and nRF5340 to the same degree in your tests?

    Hieu

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