SimpleLink™︎ Sub-1 GHz Wireless Microcontroller - Side Note : Measure Power Use of Sensor Controller Engine

RE: SimpleLink™︎ Sub-1 GHz Wireless Microcontroller - Side Note : Measure Power Use of Sensor Controller Engine

Fred27 — Tue, 22 Nov 2016 13:56:18 GMT

I just ordered some CC1310 LaunchPads and I'd assumed that the CC13xx supported EnergyTrace as the MSP432 (and MSP430) does. A quick check and it seems that it doesn't. That's a shame as it makes this sort of power measurement very easy.

RE: SimpleLink™︎ Sub-1 GHz Wireless Microcontroller - Side Note : Measure Power Use of Sensor Controller Engine

DAB — Mon, 14 Nov 2016 19:27:05 GMT

Great update Jan,

I can agree with the caution about attaching the oscilloscope.

I once shorted out a laser power supply with the scope ground.

I had never seen a wire vaporize before. Scared the hell out of me.

Took me about a week to repair all the damage. Needless to say my boss was not amused.

DAB

RE: SimpleLink™︎ Sub-1 GHz Wireless Microcontroller - Side Note : Measure Power Use of Sensor Controller Engine

Jan Cumps — Mon, 14 Nov 2016 14:20:24 GMT

I'll have to post a correction soon [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-4897829f-3b46-467d-ae18-b9130da6fedd/contentimage_5F00_1.png:16:16] because my 10K potentiometer is consuming 330 µA. Doh

Edit: done. Silly things can skew low power measurements, can't they?
Half of the power in stand-by in my original measurements was consumed by the potentiometer that I used to generate the analog input signal.

I've now redone measurements without the potentiometer (you can still se an original measurement in the photo at the start of the blog).

Another solution would be to provide the positive rail for the potentiometer from before the µCurrent...