Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

Stian Røed Hafskjold — Mon, 25 Apr 2016 12:18:58 GMT

@metch, I updated the links. Thanks for letting me know. The spikes you see in the plots are the refresh mode spikes. This is just how the regulator is designed, to charge up caps regularly to provide power to the chip.

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

Christopher — Mon, 04 Apr 2016 19:42:32 GMT

@stian, FYI, these two links are broken:

Please read this erratum for more information: [63]
Please see this erratum for more information: [62]

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

Christopher — Mon, 04 Apr 2016 12:27:37 GMT

Hi @stian,

Could you tell me what are those spikes which appear each 250ms ? They seems to appear in System Idle and System OFF.

For instance, take a look at the latest picture of the Power analyzer. Could you give me some information about these spikes ?

We used a PCA10040 dev board (nrf52). We have a very simple code running without SoftDevice (while(true) __WFI();). We also see such spikes every ~40ms. Is this normal ?

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

Stian Røed Hafskjold — Wed, 16 Mar 2016 13:46:21 GMT

@endnode:

We are working on this. Sorry for the delay.

@wenxue:

The reason is that this reverts the workarounds provided by the errata, and may cause the chip to be unstable. But for developing and during current measurements it is fine.
If you enable DCDC the regulator will automatically choose the mode that is most power efficient. So it will turn on or of DCDC automatically. However, this is only the case on the production chip (AAB0) and Engineering C (AABB). On previous Engineering versions (Eng A and B), the DCDC did not turn on or off automatically, hence the workaround provided in the code above (Because this tutorial was written for Eng B). The code above should not be used on the production chip.

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

wenxue — Tue, 23 Feb 2016 08:56:02 GMT

thanks！ but I have the following questions:

you said "This code is only useful for doing current measurements and should not be used when developing an application." .So what's the reason?
datasheet said:Automatic switching between LDO and DC/DC regulator based on load to maximize efficiency I don't understand automatic switching? If I set DCDCEN=1, it only use DCDC?

RE: Current measurement guide: Measuring current with nRF52832 Engineering B and S132 v2.0.0-7.alpha

endnode — Mon, 07 Dec 2015 09:31:39 GMT

Great post. Would it be possible to get also data on basic Central example? Knowing that Peripheral will cover most of applications there are some operating in dual or Central role and having some data before actual samples would be much appreciated.

Thanks Jan