About the static current of nRF52832-QFAA at the temperature of 60℃ and 25℃

[kenlove]

Hi,

What is the static current of nRF52832-QFAA  at the temperature of 60℃ and 25℃ (when ADC ADC ,RTC are turned on, an IO port is opened for interruption)? I tested it at 25℃ and at 60℃.

10ua at 25 ℃ and 18ua at 60 ℃.It is normal within the normal range.

Test several different PCBA, and the maximum static power consumption at 60 ℃is 28ua.

My questions:

Is the power consumption change caused by temperature difference normal?

Is the difference of 10ua between different boards normal at the same temperature?

[Kenneth]

Hello,

The leakage current in the chip is very temperature dependent, so all sleep currents will rise as temperature rise yes. So this is normal. The active currents are also affected, but since the leakage current is in the uA range, the increase is not to the same degree observable.

That said, the idle current you measure at 25C is high, you should expect around 3-4uA if you only have enabled wakeup from pin. Maybe you can share the code snippet you used during test. I suspect you may have configured pin wakeup with IN event instead of PORT event, this is configurable by adding sense-edge-mask in the devicetree for the pins you want to have wakeup.

Kenneth

[kenlove]

Hi,

The test is based on nRF5SDK. I understand what you mean.  PORT event consume less power.

I just want to make sure. Under the same conditions, is it normal for the static power consumption to fluctuate between 18-28ua?

Best regards,
Kenlove

[Kenneth]

Between chips the leakage current at higher temperatures can vary quite a lot yes.

Kenneth