LMX2820: LMX2820

Hello,

For our next project we are about to use the TI, LMX2820, 22.6-GHz Wideband PLLatinum RF Synthesizer. 

In our design the PLL Reference signal is connected to OSCIN_P [8]. The Max reference signal power level on this pin is +3.5dBm.

This Reference signal will always be connected to OSCIN_P [8] pin even when the PLL VCC is OFF (VCC = 0V).

I have two questions for this PLL:

1.  Can the PLL be damaged if we apply +3.5dBm reference signal to OSCIN_P [8] pin when PLL VCC = 0V ?
2.  Is there a chance of a Latch-Up to the reference pin (OSCIN_P [8]) when we apply PLL VCC = 3.3V ?  

Thanks,

Shay Ludin.