Product Description

The RF2705 is a low noise, multi-mode, quad-band direct I/Q to RF modulator and PA driver designed for handset applications where multiple modes of operation are required. Frequency doublers, dividers and LO buffers are included to support a variety of LO generation options. Dynamic power control is supported through a single analog input giving 90dB of power control range for the W-CDMA mode and 40dB of power control in the other two modes. Three sets of RF outputs are provided: high band and low band low noise EDGE/GMSK outputs, as well as one wideband W-CDMA output. The device is designed for 2.7V to 3.3V operation, and is assembled in a plastic, 24-pin, 4mmx4mm QFN.

Features

■ W-CDMA High/Mid/Low Power Modes

■ Quad-Band Direct Quadrature Modulator

■ Variable Gain PA Drivers

■ GMSK Bypass Amplifiers

■ LO Frequency Doubler and Divider

■ Baseband Filtering

Applications

■ EDGE/GSM (GSM850/900) Handsets

■ EDGE/GSM (DCS/PCS) Handsets

■ W-CDMA Handsets/Data Cards

■ W-CDMA/GSM/EDGE Multimode Handsets and Data Cards