nRF6707 Incorrect current measurement

RE: nRF6707 Incorrect current measurement

Florian Flex — Thu, 01 Mar 2018 10:07:30 GMT

👏 Thanks for this usefull answer.

RE: nRF6707 Incorrect current measurement

Mttrinh — Mon, 26 Feb 2018 16:19:29 GMT

Hi,

I suspect it might be that you have logging on. Can you check if NRF_LOG_ENABLED is enabled in sdk_config.h?

"Charge" is current * time(µC = µA * s). So charge is basically total current over a given time. If you know the charge in for example, a BLE event, you can se 20use it to calculate the average current over different intervalls. Let's say that a BLE event use 20µC and an intervall 100ms, then we have:

20µC / 100ms = 200µA average current over 100ms.

RE: nRF6707 Incorrect current measurement

Florian Flex — Thu, 22 Feb 2018 16:52:19 GMT

Trying now to mesure the current consumption of the DK(PCA10040) board running the ble_app_beacon code example, the measured values doesn't match the expectations we can observe using the following tool:

https://devzone.nordicsemi.com/power/ @ 3V, 500ms, 20 bytes, -16dbm

(iBeacon sample code with LED_NUMBER=0 and BUTTON_NUMBER=0, and TX POWER set to -16dbm)

The PPK measures a AVG current of 505µA while the simulation on https://devzone.nordicsemi.com/power/ AVG current of 23µA. What is the reason ?

Also, are you able to explain me in what the measured parameters such a the "Charge' is useful ? The user guide doesn't say much about its meaning. Thanks in advance

RE: nRF6707 Incorrect current measurement

Florian Flex — Fri, 16 Feb 2018 18:47:39 GMT

Hi,

I didn't. I realize that reading the documentation the first time I've focused on the "shorting" word..... Fast reading. Thanks for the info !

Thanks a lot !

RE: nRF6707 Incorrect current measurement

Mttrinh — Fri, 16 Feb 2018 14:14:09 GMT

Hi,

Have you cut the SB9 track shorting solder bridge on your DK? If not, can you try this and see if it solves the issue.

Take a look at the Quick start guide.