SKY77526

• High Efficiency: GSM850 41%; GSM900 43%; DCS 38%; PCS 40%
• Low-loss PHEMT RF Antenna Switch
• Detector Output - Linear dB/V
• Closed-Loop GMSK Mode Power Control
• Low VRAMP Current

TX Front-End Module for Quad-Band GSM / EDGE

SKY77526 TX FEM is designed for quad band cellular handsets comprising GSM850/900, DCS1800, PCS1900, supporting GMSK and linear EDGE modulation and Class 12 GPRS multi-slot operation.The module consists of separate GSM850/900 and DCS1800/PCS1900 PA blocks, 50-ohms impedance-matched inputs and outputs, a multifunction power amplifier control (MFC) block, low-pass harmonic rejection filters, and an SP6T Antenna T/R switch.The integrated MFC SKY77526 provides closed-loop power control in GMSK mode, reducing sensitivity to antenna load, input drive, temperature, power supply, and process variation. In EDGE mode, the MFC configures the PA for fixed gain and provides the ability to optimize the PA bias operation at different power levels. See the SKY77526 Product Summary below for more details.