Hi,
Got my µCurrent the other day, bought it specifically because I have a 3.0v microcontroller system and I need to measure the sleep current accurately, it draws somewhere in the region of 900na.
When I connected it all up it works fine for the milli-amp and micro-amp range and the micro runs and I get the output I expect from the µCurrent. However, when I switch to the nano-amp range it doesn't work as I was hoping. My micro fails to run and the voltage drop I get from the µCurrent is about 50% from my 3.0v source.
Since this is a micro it has some distinct levels of current consumption, at bootup it's around 6 milli-amps, it then does some work which takes around 20ma it then goes to sleep which is the current I wish to measure.
I'm suspecting the µCurrent is not allowing it to boot properly as I'm probably exceeding some of the spec for the range I'm selecting when the micro boots up.
I really just wanted to ask if anyone had any advice or point me to where I might be going wrong. I'm thinking I need to bypass the µCurrent initially while the micro boots up and goes to sleep, is it "safe" to just bridge the "current+" and "current-" terminals? By safe I mean will it damage the µCurrent?
Cheers,
Liam.