Normal Sleep current in nrf52832 custom board.

[varsha@]

Hello, 

I am using the same hardware, and firmware on 4 custom boards of the same device. I observed that I am getting different current consumptions in each devices.

I am using nrf52833 device, with normal sleep.

Device1	3.2 uA
Device2	4.0 uA
Device3	3.7 uA
Device4	3.9 uA
Device5	3.5 uA

Is this normal to have these kind of differences ?

[Vidar Berg]

Hello,

Yes, the variation is within the normal System ON sleep current distribution for the nRF52833. It seems like the numbers may be a little bit on the high side compared to the PS, but there may be other factors for that. The PS numbers are also measured at 25 C.

Best regards,

Vidar

[varsha@]

Hello Vidar,

I am using the Wake up from SYSTEM_ON mode through RTC and GPIO wakeup pin(if the switch is pressed).

According to the datasheet, for SYSTEM_ON mode, the current consumption is 1.9 uA for wakeup through RTC.

But I am getting 2.5 uA on the device (This is a custom board and I removed all peripherals on it).

How should I reduce this current?

Note : The table I showed before was the device with all peripherals intact .

[Vidar Berg]

These numbers are without RAM retention. In practice you will always need some RAM to be retained in System ON mode. Also keep in mind that this are all typical numbers measured at 25 C.