PA and LNA on nrf51822

[victor]

Hi, is it possible to add for example a www.ti.com/.../technicaldocuments On the nrf51822? I would have to modify the S110 source to turn on and off the LNA and PA when needed.

Would this be a viable solution in extending the range of the nrf51822? Do you have any other tip or idea on how to extend the range?

[Håkon Alseth]

Hi Victor,

Regarding the usage of LNA, please see this thread: devzone.nordicsemi.com/.../how-can-i-use-pa-to-increase-the-rf-coverage

When it comes to using a RF PA, note that bluetooth sig limits the output power to +10 dBm on bluetooth low energy devices.

The CC2592 includes a differential input which is not tailored towards our nRF-radios, so the performance and spurious emissions will not be optimal (you will most likely fail FCC/CE/ARIB tele-regulatory).

If you are to combine our nRF-chips with a RF PA, then you can choose any 2.4 GHz RF PA that has a single-ended 50 ohm input and output. Logic for tuning the PA on/off can be used via pin "VDD_PA", which goes high around 80 us before a TX-transmission occurs and goes low again when it's finished.

Best regards Håkon