Post
by Roberthh » Fri Aug 30, 2019 6:49 am
If I understand the properties of your multimeter right, the internal shunt for the µA range is 1000 Ohm (199.99mV/199.99µA). With the external shunt of 10 Ohm this means, that only about 1% of the current goes through the multimeter. So instead of the shown ~10nA, the devices consumes about 1 µA. That matches the data sheet of the STM32L476RG microcontroller, and is still an excellent value ( ~23 years standby on a 200mAh battery, if only the battery would last that long).