详细描述
The RF9802 is a quad band (GSM850/EGSM900/DCS1800/PCS1900) GSM/GPRS/Linear EDGE, Class 12-compliant Transmit Module with two symmetrical receive ports. This transmit module builds upon RFMD’s successful RF716x family, incorporating full EDGE capability while maintaining a common footprint for ease of phone platform design. The RF9802 continues to build upon RFMD’s leading patented PowerStar® Architecture to include such features as Power Flattening, VRAMP Filtering, VBATT Tracking, and EDGE Low Power Mode. The module includes a multi-function CMOS controller, GaAs HBT power amplifier, and pHEMT front end antenna switch. The amplifier devices are manufactured on RFMD’s Advance Gallium Arsenide Heterojunction Bipolar Transistor (GaAs HBT) Process, which is designed to operate either in saturated mode for GMSK or linear mode for EDGE 8PSK signaling. The highly integrated transmit module simplifies the phone design by eliminating the need for complicated control loop design, output RF spectrum (ORFS) optimization, harmonic filtering, and component matching, all of which combine to provide best in class RF performance, solution size, and ease of implementation for cellular phone systems. The RF ports are 50Ω matched and the antenna port includes ESD protection circuitry which meets the stringent 8kV industry standards, requiring no additional components. All of these eliminated factors help to improve the customer’s product time to market.
特点
Proven PowerStar? Architecture
High Efficiency at Rated POUTVBATT = 3.5VGSM850/EGSM900 = 41%DCS1800/PCS1900 = 38%
Integrated Power Flattening Circuit for Lower Power Variation under Mismatch Conditions
Integrated VBATT TrackingCircuit for Improved Switching Spectrum under Low VBATT Conditions
Integrated VRAMP Filter
Digital Bias Control
EDGE Low Current Mode
No External Routing
Symmetrical RX Ports
High Gain Supports Low Drive Level
Pin Compatible with RF716x GPRS only TxM Family
Robust 8kV ESD Protection at Antenna Port