RE: nRF52805 BLE radio current consumption specifications

snygaard — Wed, 28 Sep 2022 05:51:24 GMT

Thank you for the clarification.

Best regards,
Sten

RE: nRF52805 BLE radio current consumption specifications

Stian Røed Hafskjold — Tue, 27 Sep 2022 15:44:48 GMT

Hello

The Online Power Profiler (will call it OPP from here) is created as a supplement to the product specification, since the BLE specification and the resulting current consumption relies on too many parameters to document using only tables. The OPP will include all CPU processing, HF clock current, etc needed for the nRF5 to stay in either BLE advertising, or BLE connected mode.

You can select the nRF52810 in the OPP, as the radio characteristics and current consumption are almost identical to the nRF52805.

2a)

The numbers in the data sheet correspond to a continuous transmitting or receiving mode, no bursts or on/off timings. Just the run current of the radio configured in continuous TX or RX with the radio parameters needed for BLE communication, like the bit rate and the external HF clock needed for accuracy. It's not related to the link layer defined in the BLE specification, where the radio is turned on and off to create advertising or connection modes/packets.

2b)

Yes, it only covers the radio in transmitting mode. Any CPU processing must be added.

2c)

It's the peak current during a single TX burst.

I hope this answers your questions. I understand that you can only consider the product spec as the formal documentation, but unfortunately we do not document specific BLE scenarios like "Advertising 100ms, 10B payload, 1.8V, DCDC on, etc". Instead we refer to the OPP.

Of course we can provide you with measurements on the nRF52805 with which ever BLE parameters you are interested in, if that helps.

Best regards,
Stian