DTM, transmitter test, current consumption

RE: DTM, transmitter test, current consumption

Håkon Alseth — Mon, 15 Aug 2016 13:42:35 GMT

Hi,

There are examples in the PS that covers some of these scenarios: infocenter.nordicsemi.com/.../pmu.html

You can also see the dynamic peak currents and which components are active in the online power profiler for nRF52 as well: devzone.nordicsemi.com/.../

Cheers, Håkon

RE: DTM, transmitter test, current consumption

Hauser — Mon, 15 Aug 2016 10:07:42 GMT

Perfect, thank you!

And the current specification in nRF52832_PS_v1.1 chapter 23.15.2 (Radio current consumption (Transmitter))

ITX,PLUS4dBM,DCDC TX only run current (DCDC, 3V) PRF =+4 dBm 7.5 mA

only means the current needs for transmissions? Do we have to add a second current to get the real current the whole chip needs?

Thank you so far!

RE: DTM, transmitter test, current consumption

Håkon Alseth — Mon, 15 Aug 2016 09:35:30 GMT

Hi Hauser,

When running the carrier wave test, the radio will send out a carrier (no data, without modulation) and the TX will be on until you disable/reset the device.

When doing a transmitter test, the nRF will send a modulated TX packet (ie: payload with data) once every 625 us. As one packet does not take 625 us, you will get some "down time" in between each window. Thus, the current consumption is lower compared to doing a carrier wave test.

Cheers, Håkon