BRF5340+NRF21540 RX Sensitivity

RE: BRF5340+NRF21540 RX Sensitivity

Kazi Afroza Sultana — Fri, 27 Jun 2025 11:53:34 GMT

Hello,

We have data for Received signal strength of nRF5340.

These values are from the nRF5340 Product Specification and represent typical performance for the SoC alone, without the nRF21540 front-end module (FEM) attached.

''So far, I’m getting -105 dBm, but I think it can be better.'' So, if you see -105dBm, it's an improvement after attaching FEM.

However, the product specification does not provide a combined reference value for nRF5340 + nRF21540, as the final performance depends on board design, antenna matching, and configuration in the application.

RE: BRF5340+NRF21540 RX Sensitivity

SkyC — Tue, 24 Jun 2025 13:55:45 GMT

I’m currently using the nRF5340 DK with the nRF21540 EK to test RX sensitivity. So far, I’m getting -105 dBm, but I think it can be better. I would like to know if there is a reference value we can compare with later, after our own board is ready, for TX/RX performance.

RE: BRF5340+NRF21540 RX Sensitivity

Kazi Afroza Sultana — Tue, 24 Jun 2025 13:41:38 GMT

Hello,

The nRF21540 RF FEM, when combined with an nRF52 or nRF53 Series SoC, provides a 13 dB RX gain with a 2.7 dB noise figure. There is no specific estimation for nrf5340 with nRF21540. It depends on your application.

Would you like to share a bit more what you intend to do?