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PDF SKY77318 Data sheet ( Hoja de datos )
| Número de pieza | SKY77318 | |
| Descripción | iPAC PAM for Quad-Band GSM/GPRS | |
| Fabricantes | Skyworks Solutions | |
| Logotipo |  |
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DATA SHEET
SKY77318 iPAC™ PAM 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
- CELL 58%
- GSM 56%
- DCS 56%
- PCS 56%
• BiCMOS PA controller and
interface IC
- Low power control slope
- Fast response time
- Improved control
accuracy
• Integrated closed loop
power amplifier control
• Internal ICC sense resistor
for PAC
• Input/Output matching
50 Ω internal (with DC
blocking)
• 20-pad package
• Small outline: 6 x 6 mm
• Low profile: 1.2 mm
• MSL3/260 °C
Description
The SKY77318 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 GSM PA and DCS1800/PCS1900 PA blocks, impedance-matching
circuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with an
internal current-sense resistor. The custom BiCMOS 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 GSM bands and the other supports the
DCS1800 and PCS1900 bands. Both PA blocks share common power supply pads 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 SKY77318 are internally matched to a 50 Ω load to reduce the
number of external components for a quad-band design. Extremely low leakage current (2.5 μA,
typical) of the dual PA module maximizes handset standby time. The SKY77318 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 BS pad selects the PA output (DCS/PCS_OUT or GSM_OUT)
and the Analog Power Control (VAPC) controls the level of output power.
The VBATT pad connects to an internal current-sense resistor and interfaces to an integrated power
amplifier control (iPAC™) function, which is insensitive to variations in temperature, power supply,
process, and input power. The ENABLE input allows initial turn-on of PAM circuitry to minimize battery
drain.
VCC1
GSM_IN
VBATT
POWER CONTROL VAPC
ENABLE
BAND SELECT
DCS/PCS_IN
GND
Match
BiCMOS
Integrated
Power
Amplifier
Controller
Match
MODULE
HBT
PA Match
PA Match
Figure 1. Functional Block Diagram
GSM_OUT
DCS/PCS_OUT
200242_001
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200424B • Skyworks Proprietary and Confidential Information • Products and product information are subject to change without notice. • December 17, 2007
1
1 page  
SKY77318 iPAC™ PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET
www.DataSheet4U.com
Table 3. SKY77318 Electrical Specifications 1 (4 of 9)
GSM900 Mode (f = 880 to 915 MHz and PIN = 0 to 6 dBm)
Parameter
Frequency range
Input power
Analog power control voltage
Power Added Efficiency
2nd to 13th harmonics
Output power
Input VSWR
Forward isolation
Spurious
Symbol
Test Condition
f—
PIN —
VAPC —
VCC = 3.5 V
POUT = 34.5 dBm
PAE
ENABLE > 2.0 V
pulse width 577 μs
duty cycle 1:8
TCASE = +25 °C
2f0 to 13f0
7F0
BW = 3 MHz
6.5 dBm ≤ POUT ≤ 34.5 dBm
TCASE = +25 °C
POUT_MAX
VCC = 3.5 V
TCASE = +25 °C
POUT_MAX LOW VOLTAGE
VCC = 2.9 V
ENABLE > 2.0 V
TCASE = –20 °C to +100 °C
(See Table 2 for multi-slot.)
PIN = 0 dBm
POUT_MAX HIGH VOLTAGE
VCC = 4.5 V
ENABLE > 2.0 V
TCASE = –20 °C to +100 °C
(See Table 2 for multi-slot.)
PIN = 0 dBm
ΓIN
POUT = 6.5 to 34.5 dBm,
controlled by VAPC
POUT_STANDBY
PIN = 6 dBm
VAPC = 0.1 V
ENABLE ≤ 0.2 V
All combinations of the
following parameters:
Spur
VAPC = controlled 2
PIN = min. to max.
VCC = 2.9 V to 4.8 V
Load VSWR = 8:1, all phase angles
Minimum
880
0
0.2
Typical
—
—
—
Maximum
915
6
1.7
Units
MHz
dBm
V
48 56 — %
— — –10
dBm
— — –5
34.5 35.2
—
32.5 —
—
dBm
32.5 —
—
— 1.5:1 2.5:1 —
— — –35 dBm
No parasitic oscillation > –36 dBm
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200424B • Skyworks Proprietary and Confidential Information • Products and product information are subject to change without notice. • December 17, 2007
5
5 Page 
SKY77318 iPAC™ PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET
www.DataSheet4U.com
Place 0402 and 33 μF caps
as close as possible to the
VBATT pin with the 0402
closer to the pin.
From Battery
GND DCS/PCS_OUT GND
0.01μF
16
15
14
0402
VBATT
17
GND
13
33 μF
ENABLE
18
RSVD
(GND)
19
SKY77318
GND GSM_OUT
12 11
10 GND
9 GND
8 GND
VAPC 20
DC Supply trace to VCC1
must not be routed
via VBATT pin 17.
1
BS
VCC1A
2
3
4
DCS/PCS_IN GSM_IN
0402
0.01μF
5
GND
7 GND
6 VCC1B
0402
0.01μF
NOTES:
1. The value of 33 μF cap depends on the noise level on the phone board.
2. Depending on phone board noise level, not all 0402 and 0.01 μF caps may be needed.
3. Ensure sufficient numbers of vias connect VBATT pin to battery trace.
4. VBATT trace should be ≥ 1.0 mm.
5. Ensure sufficient numbers of vias connect VCC1A and B to battery trace.
6. VCC1A and VCC1B trace widths should be ≥ 0.25 mm.
7. Ground terminals of all bypass caps are connected to ground plane with vias.
8. Dotted traces can be routed in the inner layers.
Figure 2. Typical SKY77318 PAM Application
200424_002
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200424B • Skyworks Proprietary and Confidential Information • Products and product information are subject to change without notice. • December 17, 2007
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet SKY77318.PDF ] | |
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