lowest possible current consumption when system is running (nRF52810)

[buja]

Chip - BT832AF (nRF52810 QFAA)

SDK- nRF5_SDK_17.0.2_d674dde

SD - s112_nrf52_7.2.0

2V- power supply

  My application need not to be very fast, but is extremely concerned about the power consumption. My application  sends beacon, communicates with sensor (SPI).

My device is drawing a current of 330nA during system OFF, 1 uA during system ON. are these the lowest figures I can get ?

Is it possible to reduce the clock frequency to save even more current during the controller is running/systemON/OFF ?

[Simonr]

1. For (the best) timer option during sleep, please check out the ION_RAMOFF_RTC_LFXO option in sleep, compared to ION_RAMOFF_EVENT (1.1uA VS. 0.6uA), so less than 1.1uA can't be expected. Can you provide a graph showing how this varying current consumption looks and is behaving?

2. Where exactly have you seen these answers? The sd_app_evt_wait() function uses RAM retention by default, and you'll have to disable which regions you'd like to not retain RAM in. Please check out the RAM Retention example and/or the answer by my colleague Vidar in this case to get more information on how RAM retention works. Please also note that you need to know what RAM sections you can disable without interfering with the application data. 

Best regards,

Simon

[buja]

Hi Somon,

Thank you for your reply.

Please find the snapshot from STM32CubeMonitor-Power. Device is always in systemON with a timer of 5s and a gpioTE enabled. GpioTE will not be activated at anytime. 

You can see in the above figure that there is some irregularity(marked) in the current consumption. Sometimes it increases and the average current increases. What could be the reason for this ?