描述 Description

The SKY77529 Tx Front End Module (FEM) is designed in a compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, PCS1900, supporting GMSK and linear EDGE modulation. Class 12 General Packet Radio Service (GPRS) multi-slot operation is also supported.

The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, a printed directional coupler for each block impedance-matching circuitry for 50 Ω input and output impedances, a multifunction power amplifier control (MFC) block, low pass harmonic rejection filters, and an SP8T Antenna T/R switch. The T/R switch incorporates four linear ports to allow WCDMA parallel operation.

特性 Features

? WCDMA pass-through

- 4 linear ports

? TRP-compliant design

? SPI bus support

? Low loss PHEMT RF antenna switch

? Detector output: linear V/V

? Closed loop GMSK mode power control

? Small, low profile package

- 7.5 x 7.0 x 0.9 mm MAX.

- 26-pad configuration

? Gold-plated, lead-free contacts

? Low VRAMP current

Applications

? Quad-band cellular handsets:

GMSK Modulation:

- Class 4 GSM850/900

- Class 1 DCS1800/PCS1900

- Class 12 GPRS multi-slot operation

EDGE modulation:

- Class E2 GSM850/900

- Class E2 DCS1800/PCS1900