STM32WL55 RF Power Amplifier Impedance & LNA (differential) input impedance

[Meaningful_Day]

Hi.

I need to design a custom board for LoRa 923MHz network.

The AN5457 provides the example for 923MHz network. (A.1.6)

I can get output Impedance from this example(AN5457).

But I can't find LNA (Differential) Input Impedance for UFBGA73 package @923MHz.

Could you please give me input Impedance data of this package and this frequency?

[DHUBA.1 · Accepted solution]

Hello, the differential input impedance to present to the LNA is Zdiff_opt=60+j*125.

Best Regards,

Damien Hubaut.