We're planning on using the Skyworks SE2435L FEM with the EFR32MG, so we need to calculate if it's worth using the SE2435L Integrated LNA first, or just bypass it, but we couldn't find any reference of the internal EFR32MG LNA. Does anyone have any information about that ? And also, is it worth using a SAW filter as well ?
Best Regards, Drauzio.
There is no data for noise figure with EFR32MG chip. But it recommends to use the external LNA to improve the sensitivity, the sensitivity maybe 3-5dB improved according to your external LNA's noise figure.
For the SAW usage, it recommends to use if there is strong interfere close to carrier. Please refer to the blocking performance of the chip to decide the SAW usage.