This is Quadrature Modulator.
Part Number : TRF3722
Function : TRF3722 Quadrature Modulator with Integrated PLL and VCO / VQFN (48) Package
Maker : Texas Instruments
Pinouts : 
Description :
TRF3722 is a high performance direct conversion quadrature modulator with exceptional linearity and low noise performance. The typical 0.25 V baseband common mode voltage supports seamless interface with current source DACs. The device integrates the PLL and VCO to provide the local oscillator (LO) to the modulator.
Datasheet PDF Download :
Others datasheet of same file : TRF3722, TRF3722IRGZ, TRF3722IRGZR, TRF3722IRGZT
