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PDF SKY77519 Data sheet ( Hoja de datos )
| Número de pieza | SKY77519 | |
| Descripción | TX-RX FEM | |
| Fabricantes | Skyworks Solutions | |
| Logotipo |  |
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ADVANCE PRODUCT SUMMARY
SKY77519 TX-RX FEM for Quad-Band GSM / GPRS / EDGE –
Single-Band WCDMA Antenna Switch Support
Applications
• Quad-band cellular handsets
encompassing
- Class 4 GSM850/900
- Class 1 DCS1800 PCS1900
www.DataSheet-4UC.lcaosms 12 GPRS multi-slot
operation
- EDGE polar modulation
- Single-band WCDMA antenna
switch support
Features
• Small outline: 6 mm x 6 mm
• Very low profile: 1.1 mm max.
• 28-pin package
• Low input power range
- 0 to 6 dBm
• High efficiency
- GSM850 40%
- GSM900 40%
- DCS 35%
- PCS 35%
• TX-VCO-to-antenna and antenna-
to-RX-SAW filter RF interface
• TX harmonics below -35dBm
• Wideband envelop control path
• Input/Output matching 50 Ω
internal
• Low APC current: 20 µA
• High impedance control inputs
15 µA, typical
• Gold plated, lead-free contacts
Skyworks offers lead
(Pb)-free "environmentally
friendly" packaging
that is RoHS compliant
(European Parliament
for the Restriction of
Hazardous Substances).
Description
SKY77519 is a transmit and receive Front End Module (FEM) designed in a very low profile
(1.1 mm), compact form factor for quad-band cellular handsets comprising GSM850/900,
DCS1800, and PCS1900 operation — 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 and EDGE Polar Modulation. WCDMA switch-through support is
provided by a dedicated high-linearity port.
The module consists of a GSM850/900 PA and DCS1800/PCS1900 PA block, impedance-
matching circuitry for 50 Ω input and output impedances, TX harmonic filtering, high linearity-
low insertion loss switches, and a CMOS Power Amplifier Control (PAC) block. A custom silicon
integrated circuit contains decoder circuitry to control the RF switch while providing a low
current external control interface.
Fabricated in InGaP/GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the
GSM850/900 bands and DCS1800/PCS1900 bands. Both PA blocks share common power
supply pins to distribute current. The output of the PA block and the outputs to the five receive
pins connect to the antenna pin through a highly linear antenna switch. The InGaP/GaAs die,
switch die, Silicon (Si) controller die, and passive components are mounted on a multi-layer
laminate substrate and the entire assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77519 are internally matched to a 50 Ω load to reduce the
number of external components for a quad-band design. Extremely low leakage current
(10 µA, typical) of the FEM module maximizes handset standby time. Band selection and
control of transmit and receive RF signal flows are performed by use of four external control
pins. See Figure 1 shown below. Mode of operation Tx, Rx, Band (GSM850, GSM900, DCS,
PCS, and WCDMA) is controlled with 4 logic inputs: BS1, BS2, Mode, and Enable. Proper
timing of the Enable input and the Amplitude control input (Vampl) ensures high isolation high
isolation between the antenna and TX-VCO while the VCO is being tuned prior to the transmit
burst. The Enable input controls the initial turn-on of the PAC circuitry to minimize battery
drain.
The integrated power amplifier control (PAC) function provides envelope amplitude control by
reducing sensitivity to input drive, temperature, power supply, and process variation.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200500P2 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • March 22, 2006
1
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet SKY77519.PDF ] | |
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