SKY77346中文资料2G/GSM/GPRS/EDGE Power Amplifiers数据手册Skyworks规格书

描述 Description

The SKY77346 Power Amplifier Module (PAM) is designed in a low profile (0.9 mm), compact formfactor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation.The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation.

The module consists of separate GSM PA and DCS1800/PCS1900 PA blocks, impedance-matchingcircuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with aninternal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PACfunction and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, oneHeterojunction Bipolar Transistor (HBT) PA block supports the GSM bands and the other supports theDCS1800 and PCS1900 bands. Both PA blocks share common power supply pads to distributecurrent. The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layerlaminate substrate. The assembly is encapsulated with plastic overmold.

RF input and output ports of the SKY77346 are internally matched to a 50 Ω load to reduce thenumber of external components for a quad-band design. Extremely low leakage current (2.5 μA,typical) of the dual PA module maximizes handset standby time. The SKY77346 also contains bandselectswitching circuitry to select GSM (logic 0) or DCS/PCS (logic 1) as determined from the BandSelect (BS) signal. The BS pad selects between the GSM RF input andoutput pads versus the DCS/PCS RF input and output pads while the Analog Power Control (VRAMP)controls the output power level.

The VCC pad connects to an internal current-sense resistor and interfaces to an integrated poweramplifier control (iPAC™) function, which is insensitive to variations in temperature, power supply,process, and input power. The BiCMOS controller will shutdown the PA when VCC is raised above thespecified operating voltage.

The SKY77346 is compatible with logic levels from 1.2 V to VCC for BS and ENABLE pads, dependingon the level applied to the VLOGIC pad. This feature provides additional flexibility for the designer inthe selection of FEM interface control logic.

特性 Features

• Low input power range: 0 dBm to 6 dBm
• High efficiency- CELL 52%- GSM 52%- DCS 52%- PCS 52%
• BiCMOS PA controller and interface IC- Low power control slope- Fast response time- Improved control accuracy- Overvoltage Shutdown Feature
• Integrated closed loop power amplifier control
• Internal ICC sense resistor for PAC
• Input/Output matching 50 Ω internal (with DC blocking)
• Small, low profile package- 5 mm x 6 mm x 0.9 mm- 26-pad configuration
• MSL3/260 °C

应用 Application

• Smartphones