DatasheetsPDF.com

SKY77325

Skyworks Solutions
Part Number SKY77325
Manufacturer Skyworks Solutions
Description PAM
Published Jan 26, 2007
Detailed Description www.DataSheet4U.com PRELIMINARY DATA SHEET SKY77325: iPAC™ PAM for Quad-Band GSM / GPRS Applications • Quad-band cellu...
Datasheet PDF File SKY77325 PDF File

SKY77325
SKY77325

Overview
www.
DataSheet4U.
com PRELIMINARY DATA SHEET SKY77325: iPAC™ PAM for Quad-Band GSM / GPRS Applications • Quad-band cellular handsets encompassing - Class 4 GSM850/900 - Class 1 DCS1800 PCS1900 - Class 12 GPRS multi-slot operation Description The SKY77325 Power Amplifier Module (PAM) is designed in a low profile (1.
2 mm), compact form factor 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 GSM850/900 PA and DCS1800/PCS1900 PA blocks, impedancematching circuitry for 50 Ω input and output impedances, and a Power Amplifier Control (PAC) block with an internal current-sense resistor.
The custom BiCMOS integrated circuit provides the internal PAC function and interface circuitry.
Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction Bipolar Transistor (HBT) PA block supports the GSM850/900 bands and the other supports the DCS1800 and PCS1900 bands.
Both PA blocks share common power supply pins to distribute current.
The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layer laminate substrate.
The assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77325 are internally matched to a 50 Ω load to reduce the number 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 SKY77325 also contains bandselect switching circuitry to select GSM (logic 0) or DCS/PCS (logic 1) as determined from the Band Select (BS) signal.
In Figure 1 below, the BS pin selects the PA output (DCS/PCS OUT or GSM850/900 OUT) and the Analog Power Control (VAPC) controls the level of output power.
VBATT and VSENSE pins connect to an internal current-sense resistor and interface to an integrated power amplifier control (iPAC™) function, which is insensitive to variations ...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)