Output impedance of RFIO pin SX1280

“Hello everyone, I’m designing a circuit using SX1280, but I don’t know the output impedance of the RFIO pin of the SX1280. Could anyone share this information with me? Thank you very much.”

I could have sworn I saw 48ohm somewhere, but cant find it now.

The Johanson filter that is designed for the sx1280 has an impedance for 50ohm. So I would go with that.