how big is the current when working at ble5.0 for a range of 300m

Question

It is said that ble5.0 can cover a range of 300m, I wonder how big is current when this is achieved? For 52840, the largest power output is 8dBm, for 52832, the largest output is 4dBm, I doubt they can achieve this range at this low output power? if not, how big is the current when they can achieve.

bjorn-spockeli · Accepted Answer

HI Yingkang. 
 it is only the nRF52840 that support the Bluetooth 5 Long Range feature that uses the Coded PHY(either 125kbps or 500kbps). The nRF52832 is Bluetooth 5 qualified and supports Advertisment Extensions and High Speed(2M PHY), but not Long Range(Coded Phy). The nRF52840 supports all of the optional Bluetooth 5 features. 
 Please see the nRF52840 Radio current consumption (transmitter) for the current consumption for different TX output power levels. I also recommend that you take a look at our T esting Long Range (Coded PHY) with Nordic solution (It Simply Works) blog post, which goes more into detail regarding the achievable range with the Coded PHY on the nRF52840. 
 Best regards 
 Bjørn