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SKY77518 Schematic ( PDF Datasheet ) - Skyworks

Teilenummer SKY77518
Beschreibung TX-RX iPAC FEM
Hersteller Skyworks
Logo Skyworks Logo 




Gesamt 14 Seiten
SKY77518 Datasheet, Funktion
PRELIMINARY DATA SHEET
SKY77518 TX–RX iPAC™ FEM for Dual-Band GSM/GPRS
Applications
Dual-band cellular handsets
encompassing
- Class 4 GSM900
- DCS1800
- Class 12 GPRS multi-slot
operation
Features
High efficiency
- DCS 41%
- GSM900 46%
Low transmit supply current
- GSM900 1.3 A
- DCS1800 0.9 A
Internal ICC sense resistor for iPAC
Closed loop iPAC
50 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
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
The SKY77518 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 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 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 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.
GSM_IN
VBATT
VRAMP
TX_EN
BS
VLOGIC
DCS
Match
BiCMOS
Integrated
Power
Amplifier
Controller
Antenna
Switch
Decoder
Match
HBT
GSM_OUT
PA Match/
Filter
4
DCS_OUT
PA
Match/
Filter
SKY77518
2
Diplexer
2
GND GSM_RX
Figure 1. Functional Block Diagram
DCS_RX
200472_001
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200472P1 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • November 9, 2005
1






SKY77518 Datasheet, Funktion
PRELIMINARY DATA SHEET
SKY77518 TX–Rx IPAC™ FEM FOR DUAL-BAND GSM/GPRS
Table 4. SKY77518 Electrical Specifications 1 (4 of 5)
DCS1800 Mode ( f = 1710 to 1785 MHz and PIN = 0 to 6 dBm)
Parameter
Symbol
Test Condition
Minimum
Frequency range
Input power
Analog power control voltage
Power Added Efficiency
Supply Current @ Rated Power
2nd to 7th harmonics
Output power
Input VSWR
Forward isolation 4
f
PIN
VRAMP
PAE
ICC_31 dBm
2f0 to 7f0
POUT
POUT _MAX LOW VOLTAGE
POUT _MAX HIGH VOLTAGE
ΓIN
POUT RX
POUT_ENABLED_TX
VCC = 3.3 V
POUT = 31 dBm
TX_EN = VTX_EN_HIGH
VRAMP set for POUT = 31 dBm
pulse width 577 µs
duty cycle 1:8
TCASE = +25 °C
VCC = 3.3 V
POUT = 31 dBm
TX_EN = VTX_EN_HIGH
VRAMP set for POUT = 31 dBm
pulse width 577 µs
duty cycle 1:8
TCASE = +25 °C
BW = 3 MHz,
0 dBm POUT 31 dBm
VCC = 3.3 V
TCASE = +25 °C
PIN = 0 dBm
VCC = 2.7 V
TX_EN = VTX_EN_HIGH
TCASE = –15 °C to +85 °C
PIN = 0 dBm
VCC = 5.5 V
TX_EN = VTX_EN_HIGH
TCASE = –15 °C to +85 °C
PIN = 0 dBm
POUT = 0 to 31 dBm
VRAMP controlled
PIN = 6 dBm
VRAMP 0.1 V
VLOGIC = VTX_EN_HIGH
TX_EN = VTX_EN_LOW
Mode=DCS_Rx (see Table 3)
PIN = 6 dBm
VRAMP 0.1 V
VLOGIC = VLOGIC_HIGH
TX_EN = VTX_EN_HIGH
Mode = DCS_TX (see Table 3)
1710
0
0.2
35
31.0
28.5
28.5
Coupling of DCS TX output to Receive
RF output pad 4
CDCS_TX-Rx_F0
0 dBm POUT 31 dBm
Mode = DCS_TX (see Table 3)
Typical
Maximum
1785
6
1.8
41
0.93 1.04
–40 –33
32.0
30.5
33.0
1.5:1 2.5:1
–60 –50
–35 –5
69
Units
MHz
dBm
V
%
A
dBm
dBm
dBm
dBm
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
6 November 9, 2005 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • 200472P1

6 Page









SKY77518 pdf, datenblatt
PRELIMINARY DATA SHEET
SKY77518 TX–Rx IPAC™ FEM FOR DUAL-BAND GSM/GPRS
0.3 ±0.05
Ø1.55 ±0.05
PIN 1
8(P1)
B
8.35(Bo)
A
A
4(Po) 2 ±0.05
1.75 ±0.1
7.5 ±0.05
16 ±0.3
1.7(Ko)
SECTION B–B
B
6.35(Ao)
Ø1.5 MIN
SECTION A–A
NOTES:
1. CARRIER TAPES MUST MEET ALL REQUIREMENTS OF SKYWORKS GP01–D232 PROCUREMENT SPEC FOR TAPE AND REEL SHIPPING.
2. CARRIER TAPE SHALL BE BLACK CONDUCTIVE POLYSTYRENE.
3. COVER TAPE SHALL BE TRANSPARENT CONDUCTIVE PRESSURE SENSITIVE ADHESIVE (PSA) MATERIAL W/13.3 mm WIDTH.
4. ESD-SURFACE RESISTIVITY SHALL BE 1 X 1010 OHMS/SQUARE PER EIA, JEDEC TNR SPECIFICATION.
5. Po/P1, 10 PITCHES CUMULATIVE TOLERANCE ON TAPE: ±0.2 mm.
6. Ao & Bo MEASUREMENT POINT TO BE 0.3 mm FROM BOTTOM POCKET.
7. ALL DIMENSIONS ARE IN MILLIMETERS.
8. PART NO.: eC3-MCM0608-16-8-F1-L REV. 0. PLEASE INDICATE ON PURCHASE ORDER.
9. NUMBER OF PARTS per 13 inch (DIAMETER) x 16 mm wide REEL: 2500.
ePAK CARRIER TAPE
CARRIER TAPE_OVERMOLD MCM_6x8x1.4 mm BODY SIZE_GP01-D232-081B
101568_011
Figure 7. Tape and Reel Dimensional Diagram for 6 x 8 x 1.2 mm Package SKY77518 Specific
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
12 November 9, 2005 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • 200472P1

12 Page





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