nRF21540 PA gain versus temperature

RE: nRF21540 PA gain versus temperature

skajam66 — Fri, 09 Aug 2024 07:14:09 GMT

Yes, thanks for that. Unfortunately, we do not use the SPI interface... ☹

RE: nRF21540 PA gain versus temperature

PaKa — Thu, 08 Aug 2024 13:19:26 GMT

And do note: if you use the nRF21540 and set up your nRF Connect SDK project to control this through both pins and SPI then it will have automatic temperature compensation for the gain in the FEM as well as the gain in the SoC used. Easiest way to make temperature compensation as it is already done :-)

RE: nRF21540 PA gain versus temperature

skajam66 — Thu, 08 Aug 2024 12:27:48 GMT

Ah! I see it in the FEM power models section. Many thanks. AC

RE: nRF21540 PA gain versus temperature

skajam66 — Thu, 08 Aug 2024 12:19:41 GMT

Yes, I see that. Is there any published data on how the PA gain varies over the operating temperature range?

RE: nRF21540 PA gain versus temperature

Priyanka — Thu, 08 Aug 2024 12:00:11 GMT

Hi Andrew,
Like Paal mentioned, you can find the data here:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/fem_power_models.html

https://docs.nordicsemi.com/bundle/ps_nrf21540/page/chapters/keyparameters/doc/electrical_specification.html#ariaid-title7

Regards,

Priyanka

RE: nRF21540 PA gain versus temperature

PaKa — Thu, 08 Aug 2024 11:51:41 GMT

There are figures for the the calibrated 20dBm and 10dBm gain settings in the Production Specification under typical characteristics.