NRF52832 Current Consumption

RE: NRF52832 Current Consumption

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RE: NRF52832 Current Consumption

Ounes1970 — Mon, 17 Feb 2025 08:41:07 GMT

If you’re using something like a connection interval of 100ms with no slave latency, the RX current draw will happen in short bursts but won’t be continuously pulling 11.7mA.

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RE: NRF52832 Current Consumption

Stian Røed Hafskjold — Mon, 31 Aug 2020 11:53:04 GMT

During a BLE connection the TX/RX pair is scheduled in intervals (called "connection interval") and they are on for just a few milliseconds at a time. RX is not running continuously. The average current will depend on the connection interval. If you are not sending any data, or don't need to have a low latency data transmission, you can use a very long connection interval and the average current will be in the 10 uA range, just for maintaining the connection. Check out the BLE power calculator: https://devzone.nordicsemi.com/nordic/power/w/opp/2/online-power-profiler-for-ble

Not sure what you application is doing but a 100% CPU usage seems very intense. The CPU is going to idle mode when not being used (place WFE (wait for event) in the main loop), and consume about 2 uA. The timing of the sensor sampling is usually handled by the RTC timer (running of the 32.768 kHz LF clock), or the TIMER peripheral (running of the 32MHz HF clock, for better accuracy). RTC and TIMER run currents are approximately 1uA and 0.5mA respectively. The run current of the CPU is 7.4mA (LDO) but it's usually running just a fraction of the time.

RE: NRF52832 Current Consumption

hmolesworth — Sun, 30 Aug 2020 19:10:49 GMT

As a guide, 24-bit 250Hz sampling of analogue over external 8MHz SPI AFE, streaming this data to NAND flash over a second 8MHz SPI and concurrently streaming over BLE can be done for an average current less than 1.3mA on a 2.7 volt coin battery using internal DC-DC converter. I can't provide more information, but your numbers look on the high side. Raising the 2.7 volts supply to 3 volts by using a new battery reduces the 1.3mA somewhat, but CR2032 doesn't usually stay at 3 volts for that long :-) Good storage capacitance of (say) 150uF helps a lot.