900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Skyworks

SKY77518-21 Datasheet Preview

SKY77518-21 Datasheet

FEM FOR DUAL-BAND GSM/GPRS

No Preview Available !

DATA SHEET
SKY77518-21 TX–RX iPACFEM for Dual-Band GSM/GPRS
Applications
Dual-band cellular handsets
encompassing
- Class 4 GSM900
- DCS1800
- Class 12 GPRS multi-slot
operation
Features
High efficiency
- GSM900 48%
- DCS 41%
Low transmit supply current
- GSM900 1.26 A
- DCS1800 0.9 A
Internal ICC sense resistor for iPAC
Closed loop iPAC
50 Ω matched Input/Output
TX–VCO-to-antenna and antenna-
to-RX-SAW filter RF interface
TX harmonics below –33 dBm
PHEMT RF switches afford high
linearity, low insertion loss, and
less than 20 μA supply current in
receive modes
Small outline: 6 mm x 8 mm
Low profile: 1.2 mm
Compatible with multiple logic
families
Low APC current: 25 μA
Description
The SKY77518-21 is a transmit and receive front-end module (FEM) with Integrated Power
Amplifier Control (iPAC) for dual-band cellular handsets comprising GSM900 and DCS1800
operation. Designed in a low profile, compact form factor, the SKY77518-21 offers a complete
Transmit VCO-to-Antenna and Antenna-to-Receive SAW filter solution. The FEM also supports
Class 12 General Packet Radio Service (GPRS) multi-slot operation.
The module consists of a GSM900 PA block and a DCS1800 PA block, impedance-matching
circuitry for 50 Ω input and output impedances, TX harmonics filtering, high linearity and low
insertion loss PHEMT RF switches, diplexer and a Power Amplifier Control (PAC) block with
internal current sense resistor. A custom BiCMOS integrated circuit provides the internal PAC
function and decoder circuitry to control the RF switches. The two Heterojunction Bipolar
Transistor (HBT) PA blocks are fabricated onto a single Gallium Arsenide (GaAs) die. One PA
block supports the GSM900 band and the other PA block supports the DCS1800 band. Both PA
blocks share common power supply pads to distribute current. The output of each PA block
and the outputs to the two receive pads are connected to the antenna pad through PHEMT RF
switches and a diplexer. The GaAs die, PHEMT die, Silicon (Si) die and passive components are
mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic
overmold.
Band selection and control of transmit and receive modes are performed using two external
control pads. Refer to the functional block diagram in Figure 1 below. The band select pad (BS)
selects between GSM and DCS modes of operation. The transmit enable (TX_EN) pad controls
receive or transmit mode of the respective RF switch (TX = logic 1). Proper timing between
transmit enable (TX_EN) and Analog Power Control (VRAMP) allows for high isolation between
the antenna and TX-VCO while the VCO is being tuned prior to the transmit burst.
The SKY77518-21 is compatible with logic levels from 1.2 V to VCC for BS and TX_EN pads,
depending on the level applied to the VLOGIC pad. This feature provides additional flexibility for
the designer in the selection of FEM interface control logic.
www.DataSheet4U.com
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200786A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • November 6, 2007
1




Skyworks

SKY77518-21 Datasheet Preview

SKY77518-21 Datasheet

FEM FOR DUAL-BAND GSM/GPRS

No Preview Available !

DATA SHEET
SKY77518-21 TX–RX iPACFEM FOR DUAL-BAND GSM/GPRS
Electrical Specifications
The following tables list the electrical characteristics of the
SKY77518-21 Front-End Module. The absolute maximum ratings
and recommended operating conditions for the SKY77518-21 are
listed in Table 1 and Table 2, respectively. Table 3 specifies the
mode control logic and Table 4 contains the electrical
characteristics of the SKY77518-21 for modes GSM900 and
DCS1800. Figure 2 presents an application schematic for the
SKY77518-21.
The SKY77518-21 is a static-sensitive electronic device and
should not be stored or operated near strong electrostatic fields.
Detailed information on device dimensions, pad descriptions,
packaging and handling can be found in later sections of this data
sheet.
Input Power (PIN)
Supply Voltage (VCC), Standby
VRAMP 0.3 V
VLOGIC 0.5 V
Control Voltage (VRAMP)
Storage Temperature
Parameter
Table 1. Absolute Maximum Ratings
Minimum
–0.5
–55
Maximum
15
7
VCC_MAX – 0.2 V
(See Table 4)
150
Unit
dBm
V
V
°C
Table 2. Recommended Operating Conditions
Parameter
Minimum
Typical
Supply Voltage (VCC)
Supply Current (ICC)
Operating Case Temperature (TCASE) 1
1-Slot (12.5% duty cycle)
2-Slot (25% duty cycle)
2.7
0
–20
–20
3.3
1 Case Operating Temperature refers to the temperature of the GROUND PAD on the underside of the package.
Maximum
4.8
1.8
85
85
Unit
V
A
STANDBY
GSM_RX
DCS_RX
GSM_TX
DCS_TX
1 X = don’t care
www.DataSheet4U.com
Mode
Table 3. SKY77518-21 Mode Control Logic
VLOGIC
0
1
1
1
1
Input Control Bits
TX_En
X1
0
0
1
1
BS
X1
0
1
0
1
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2 November 6, 2007 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • 200786A


Part Number SKY77518-21
Description FEM FOR DUAL-BAND GSM/GPRS
Maker Skyworks
PDF Download

SKY77518-21 Datasheet PDF






Similar Datasheet

1 SKY77518-21 FEM FOR DUAL-BAND GSM/GPRS
Skyworks





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy