SKY77590-51 Datasheet PDF - Skyworks Solutions
| Part Number | SKY77590-51 | |
| Description | Tx-Rx FEM | |
| Manufacturers | Skyworks Solutions | |
| Logo |  |
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PRELIMINARY DATA SHEET
SKY77590-51 Tx-Rx FEM for Quad-Band GSM/ GPRS/ EDGE
with Six Linear TRx Switch Ports and Dual-Band TD-SCDMA
Applications
• Quad-band GSM/EDGE and Dual-
Band TD-SCDMA cellular handsets
encompassing
- Class 4 GSM850/900
- Class 1 DCS1800/PCS1900
- Class 12 GPRS
multi-slot operation
- 6 low insertion loss / high
linearity interchangeable TRx
switch ports
- Linear EDGE operation
- TD-SCDMA Bands 34/39
Features
• Small, low profile package
- 6 mm x 6 mm x 0.85 mm
- 28-pad configuration
• Low input power range
–1 dBm to 6 dBm
• High efficiency
- 40% GSM850
- 40% GSM900
- 35% DCS1800
- 35% PCS1900
• Tx-VCO-to-antenna and antenna-
to-Rx-SAW filter RF interface
• Tx harmonics below –38 dBm
• Current limiting for over-voltage
protection and extended battery
life
• Input/Output matched internally to
50 Ω
• High impedance control inputs:
20 µA, maximum
• Power control circuitry built-in for
improved TRP variation
Description
SKY77590-51 is a transmit and receive Front End Module (FEM) designed in a very low profile
(0.9 mm) and compact form factor for quad-band cellular handsets comprising GSM850/900,
DCS1800, and PCS1900 operation and dual-band TD-SCDMA bands 34 and 39 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 linear EDGE
operation. 3G switch-through support is provided by six dedicated high-linearity ports.
The module consists of a GSM850/900 PA and DCS1800/PCS1900/TD-SCDMA PA block,
impedance-matching circuitry for 50 Ω input and output impedances, Tx harmonic filtering, a
high linearity/low insertion loss switch, 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 and TD-SCDMA bands 34/39. Both PA
blocks share common power supply pads to distribute current. The output of the PA block and
the outputs to the six receive pads connect to the antenna pad through a high-linearity antenna
switch. The 3G and Rx ports feature a 0 volts DC offset level which eliminates the need for
external blocking capacitors. 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 SKY77590-51 are internally matched to a 50 Ω load to reduce
the number of external components on the phone board. Extremely low leakage current of the
FEM maximizes handset standby time. Control of transmit and receive RF signal flows, and
band selection are performed by four external control pads (see Figure 1 on overleaf). Mode of
operation, Tx vs. Rx, and Band (GSM850, GSM900, DCS1800, PCS1900, and Bands 34/39) are
controlled with the four logic inputs: Mode, TxEN, BS1, and BS2. Proper timing of the TxEN
input and the VRAMP input ensures high isolation between the antenna and Tx-VCO while the
VCO is being tuned prior to the transmit burst.
The integrated power amplifier control (PAC) function provides envelope amplitude control
while reducing sensitivity to input drive, temperature, power supply, and process variation.
Output power variation into mismatch is minimized with Skyworks’ True Power control circuit.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202524A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • November 8, 2012
1
Free Datasheet http://www.datasheet-pdf.com/
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SKY77590-51 Tx-Rx FEM FOR QUAD-BAND GSM / GPRS / EDGE
with SIX LINEAR TRx SWITCH PORTS and DUAL-BAND TD-SCDMA
PRELIMINARY DATA SHEET
TABLE 5. SKY77590-51 ELECTRICAL CHARACTERISTICS (1 OF 2)
Unless otherwise specified: 50 Ω system; pulsed operation with pulse width 2308 µs; duty cycle 4:8;–20 °C ≤ TCASE ≤ +85 °C;
3.0 ≤ VBATT ≤ 4.6 V; Terminate all unused RF ports with 50 Ω during test.
GSM850/900
GMSK Mode
Parameter
Symbol
Frequency Range
Input Power
Supply Voltage
Supply Current
Power Added Efficiency
GSM850 ƒ
GSM900
PIN
VBATT
VCC
IBATT
GSM850 PAE
GSM900
Harmonics
Output Power
2ƒ0 to 15ƒ0
POUT_GMSK
Input VSWR
Isolation
POUT_GMSK_EX
ΓIN
ISO_PDSD
ISO_PESE
Conditions
—
—
—
—
—
VBATT = 3.5 V
PIN = 3 dBm
VRAMP = MAX VRAMP1
Duty cycle = 1:8
TCASE = +25 °C
BW = 3 MHz
5 dBm ≤ POUT ≤ 33 dBm
PIN = –1 dBm
VBATT = 3.5 V
VRAMP = 1.6 V
TCASE = +25 °C
PIN = –1 dBm
VBATT = 3.0 V
VRAMP = 1.6 V
POUT ≤ 33 dBm
PIN ≤ 6 dBm
TxEN < 0.4 V
BS2 = Logic High
VRAMP ≤ 0.1 V
PIN ≤ 6 dBm
TxEN ≥ 1.2 V
BS2 = Logic High
VRAMP ≤ 0.1 V
Minimum
824
880
–1
3.0
2.5
—
—
Typical
—
—
—
3.5
—
—
40
Maximum
849
915
6
4.6
4.6
2.3
—
Unit
MHz
dBm
V
A
%
— 40 —
–40 –34 dBm
33.3 34.0
—
dBm
31.0 —
—
— — 2.5:1
— –62 –46 dBm
— — –10
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202524A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • November 8, 2012
5
Free Datasheet http://www.datasheet-pdf.com/
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| Information | Total 22 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ SKY77590-51.PDF Datasheet ] | |
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