Product Description:
The TQ5638 is a CDMA Rx Receiver designed for KPCS-Band, Dual-Mode operation. The device supports KPCS CDMA and GPS. The IF range is from 80 MHz to 230MHz with external tuning. The Low Noise Amplifiers have an adjustable third order intercept (IP3) to minimize inter-modulation and cross-modulation effects. The mixers are designed for differential IF outputs (single-ended or differential IF for GPS modes), and they feature excellent linearity and low noise figure.

FEATUREs
◾ KPCS-CDMA and GPS operation
◾ Excellent Cross Modulation Performance
◾ Low current consumption
◾ 9.0 dBm PCS LNA IIP3
◾ 11.0 dBm PCS Mixer IIP3
◾ Excellent Noise and Gain performance
◾ Adjustable third order intercept on LNA stage
◾ Flexible IF frequency range from 80 – 230 MHz
◾ TX LO Buffer included
◾ Small 4x4 Package
◾ Full ESD Protection
◾ Few external components

System Advantage
◾ Most compact integrated receiver for KPCS CDMA and A-GPS applications
◾ IS-98 IMD requirements met with 2 gain states simplifying calibration procedures
◾ High mixer linearity eliminates potential call drop issues associated with gain switching
◾ Enhanced PCS linearity enables use of FBAR or SAW PCS duplexers
◾ Best I in class A-GPS cascade gain for maximum takeover

APPLICATIONs
◾ KPCS band/A-GPS CDMA (IS-95/98) based mobile phones