Hello all,
During current measurements of our product using nrf52832QFAAB0 I've noticed a high IDLE current of ~450uA. Trying to isolate the problem we programmed our board with ble_app_beacon example from SDK 14.0.0 and Soft Device s132 5.0.0 obtaining the same IDLE currrent.
Including sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE)
(on the end of ble_stack_init()) reduced the IDLE currrent to ~275uA. A value still quite above the one described on devzone.nordicsemi.com/.../.
We've run some tests on a board with minimal circuitry, as described on section 53.2 from the nRF52832 Product Specification v1.3, getting the same ~275uA.
Browsing the forum I stumbled on [156] GPIOTE: Some CLR tasks give unintentional behavior but I not sure if it's applicable, since ble_app_beacon does not use GPIOTE.
I've used an Oscilloscope, an instrumentation AmpOp and 1 ohm shunt resistor to read the lower currents. And have validated the minimum precision by measuring the current of a device on System OFF mode, on this mode the reading was ~2uA.
Is there any other configuration missing from the ble_app_beacon to reduce the power consumption or any other bug that could be causing this high IDLE current?
Thank you.