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LAUNCHXL-CC13-90: Schematic explanation

Part Number: LAUNCHXL-CC13-90
Other Parts Discussed in Thread: CC1310, CC1190


I would like to more understand schematic of LAUNCHXL-CC13-90EU.

Could please correct me if I am wrong and add some information ?

We have CC1310 , then:

- A balun - TR1 (0850BM14E0016), use for adapte from output/input pin CC1310 complex impedance to 5ohms

- A SAW filter - FL2 (B39871B3725U410), use to filter a narrow band (868Mhz to 870Mhz). This saw filter is use for LNA ? or LNA and PA ? (Is it a good idea to put a SAW filter before PA ? of better after PA?)

- A Low Pass LC filter - C111/L111, with cut of @1779.4064Mhz, second harmonic ?

- CC1190 amplifier - U11, to amplify @27dbm

- LC ? - L25/C210. What for?

- C DC Block - C215

- LC - L26/C214, impedance matching RX/single ended

- Notch filter - C212/C24/L27

- A Low Pass LC filter - C25/L24 609.2125Mhz, ?!

- CL - A2/A3, impedence adaptation for antenna