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參數(shù)資料
| 型號： | SKY77324 |
| 廠商： | SKYWORKS SOLUTIONS INC |
| 元件分類： | 放大器 |
| 英文描述： | iPAC PAM for Quad-Band GSM / GPRS |
| 中文描述： | 824 MHz - 849 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封裝： | 6 X 6 MM, 1.2MM HEIGHT, LEAD FREE, LEADLESS PACKAGE-22 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大小： | 1218K |
| 代理商： | SKY77324 |
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
103123D Skyworks Proprietary and Confidential information. Products and product information are subject to change without notice. June 9, 2005
1
DATA SHEET
SKY77324 iPAC PA Module 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
Features
Low input power range 0 to 6
dBm
High efficiency
- GSM850 49%
- GSM900 53%
- DCS 53%
- PCS 53%
Internal I
CC
sense resistor for
PAC
Closed loop iPAC or open loop
operation with external PAC
circuit
Input/Output matching 50
internal (with DC blocking)
22-pin package
- Small outline 6 mm x 8 mm
- Low profile 1.2 mm max.
Low APC current 20 A
Gold plated, lead-free contacts
Description
The SKY77324 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, impedance-
matching circuitry for 50
input and output impedances, and a Power Amplifier Control (PAC)
block with an internal current-sense resistor. The custom CMOS 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 SKY77324 are internally matched to a 50
load to reduce the
number of external components for a quad-band design. Extremely low leakage current (2.5
A,
typical) of the dual PA module maximizes handset standby time. The SKY77324 also contains
band-select 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 Band Select (BS) pin selects the PA output, either
DCS/PCS_OUT or GSM_OUT, and the 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 in
temperature, power supply, and process. The PAC ENABLE input allows initial turn-on of PAC
circuitry to minimize battery drain.
Figure 1. Functional Block Diagram
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