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Biasing at CC259x antenna out

Hung
Prodigy 480 points
Other Parts Discussed in Thread: CC2591

Hi all,

 

I know that the antenna of of CC259x (pin 11) should be connected to Vcc pin through Tline (inductor) in Tx mode so there is a DC net level in this pin.  Right?  How about the connection on Rx mode for LNA, is there a same DC level as Tx mode?  If then, a series capacitor needed to include in the matching for DC blocking application.  Right?

 

thanks.

 

Hung

  • 0
    TI__Guru**** 317180 points

    I believe the CC2591 uses an internal inductor to Vdd and hence pin 11 should not be connected through an inductor to Vdd. Please refer to the datasheet (http://www.ti.com/lit/ds/symlink/cc2591.pdf) and reference designs (example http://www.ti.com/lit/an/swra229a/swra229a.pdf) for details.