PA enable pin option ECP200D Triquent

Dear all,

i am planing to use Triquent ECP200D as a amplifier at 433MHz.

This will meet my all the RF requirements Except PA enable pin option.

My Query is:
1. is it possible to connect series switch at pin Vref and use as Enable pin.
2. is it possible to connect series switch at pin Vbias and use as Enable pin.
3. Any suggestion on how to implement PA enable pin for this chip.

Pls find the attached datasheet of the EDP200D. and PA enable pin blcok.



Tanks
roshni