0.23uA consumption when deep sleep

RE: 0.23uA consumption when deep sleep

Stian Røed Hafskjold — Thu, 03 Jan 2019 10:43:33 GMT

Hello, because of chip to chip variation it is completely normal to see system OFF currents at around 0.3uA on some chips. There's nothing to worry about.

RE: 0.23uA consumption when deep sleep

Jose Xavier — Wed, 02 Jan 2019 13:56:19 GMT

0.5% of 220uA is 1.1uA +10 digits gives 0.11uA of accuracy.

It is strange that the value is the same on two completely diferdiff multi-meters.

RE: 0.23uA consumption when deep sleep

rogerarchibald — Wed, 02 Jan 2019 12:49:21 GMT

The DC current measurement specs for that meter include the following line:

DC Current Measurement:
220µA / 2200µA +/- (0.5%+10)

There's a +/- of >10uA and you're talking about a discrepancy of a few hundred nA. I think that it is nothing to be too concerned about.

RE: 0.23uA consumption when deep sleep

Jose Xavier — Wed, 02 Jan 2019 10:02:53 GMT

I update my question

RE: 0.23uA consumption when deep sleep

rogerarchibald — Wed, 02 Jan 2019 04:23:36 GMT

What type of test equipment are you using to measure current? Sub-mA I would be skeptical of the accuracy of most meters.

It may be useful to know more about the board as well, but since we’re talking about drawing less current than expected I would assume that it’s a measurement issue.