TRF372017: Power Save Exit Issue

Part Number: TRF372017


I have a design with the TRF372017 and things are going pretty well thus far. The design uses the power save input pin to control the RF output when the transmitter side of things needs to be off. Nine times out of 10 the device returns from the reduced power mode just fine. On that tenth time, the device returns but it has additional spurs and increased phase noise on the LO. If I re-write register 2 and enable a calibration, the spurs go away and the phase noise returns to normal. Can you help me understand what is going on with the PS input and why this is happening.



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