SKY77197

• Low voltage positive bias supply: 3.2 V to 4.2 V
• Good linearity
• High efficiency: 40% @ 28.25 dBm
• Large dynamic range
• 14-pad package: 5 mm x 4 mm x 0.85 mm
• Power down control
• InGaP
• Supports low collector voltage operation
• Digital Enable
• No VREF required
• CMOS compatible control signals
• Integrated Directional Coupler

Dual-Band PA Module for WCDMA / HSDPA Band I (19201980 MHz) and Band V (824849 MHz)

The SKY77197 Power Amplifier Module (PAM) is a fully matched, 14-pad, surface mount moduledeveloped for Wideband Code Division Multiple Access (WCDMA) applications. This small and efficientmodule packs full WCDMA Band I and Band V coverage into a single compact package. TheSKY77197 meets the stringent spectral linearity requirements of WCDMA transmission, with highpower added efficiency for power output to 28.25 dBm (Band I and Band V). The SKY77197 meets thestringent spectral linearity requirements of High Speed Downlink Packet Access (HSDPA) datatransmission with high power added efficiency. A directional coupler is integrated into the modulethus eliminating the need for any external coupler.

The single Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) SKY77197 contains all activecircuitry in the module. The MMIC contains on-board bias circuitry, as well as input and interstagematching circuits. Output match into a 50-ohm load is realized off-chip within the module package tooptimize efficiency and power performance.

The SKY77197 PAM is manufactured with Skyworks' InGaP GaAs Heterojunction Bipolar Transistor(HBT) BiFET process that provides for all positive voltage DC supply operation while maintaining highefficiency and good linearity. No VREF voltage of SKY77197 is required. Power down is accomplished by setting thevoltage on VENABLE to zero volts. No external supply side switch is needed as typical "off" leakage isa few microamperes with full primary voltage supplied from the battery.