SKY65116 Datasheet, PDF (10/14 Pages) Skyworks Solutions Inc. – 390-500 MHz Linear Power Amplifier

Data Sheet • SKY65116
Application Circuit
Reference
Voltage
C3
10 µF
C6
0.01 µF
12
C5
0.01 µF
C4
11
10
0.01 µF
C2
10 µF
PA Control
Voltage
V_CC
C1
10 µF
1
GND
RF in
50 Ω transmission
line
2
RFIN
3
GND
9
GND
8
RFOUT
7
GND
RF out
50 Ω transmission
line
V_CC
C7
10 µF
C8
0.01 µF
4
5
6
Pin Assignments
Pin #
Name
Description
1
GND
Ground
2
RFIN
RF input
3
GND
Ground
4
V_CC1
Stage 1 collector voltage
5
GND
Ground
6
GND
Ground
7
GND
Ground
8
RFOUT RF output
9
GND
Ground
10
V_CC2
Stage 2 collector voltage
11
V_CNT
PA on/off coltrol voltage
12
V_REF
Bias reference voltage
Center attachment pad must have a low inductance and low thermal resistance connection to
the customer’s printed circuit board ground plane.
Evaluation Board Description
The Skyworks SKY65116 evaluation board is used to test the
performance of the SKY65116 power amplifier module. The
following design considerations are general in nature and
must be followed regardless of final use or configuration.
1. Paths to ground should be made as short as possible.
2. The ground pad of the SKY65116 power amplifier module has
special electrical and thermal grounding requirements. This pad
is the main thermal conduit for heat dissipation. Since the circuit
board acts as the heat sink, it must shunt as much heat as pos-
sible from the amplifiers. As such, design the connection to the
ground pad to dissipate the maximum wattage produced to the
circuit. Multiple vias to the grounding layer are required.
3. Two external output bypass capacitors (0.01 μF and 10 μF) are
required on the V_CC1 (pin 4) supply input. The same two capac-
itor values are also required on the V_CC2 (pin 10) supply input
and on the V_REF input (pin 12). Each of these capacitors should
be placed in parallel between the supply line and ground.
4. V_CC1 (pin 4) and V_CC2 (pin 10) may be connected together at
the supply.
NOTE: Junction temperature (T_J) of the device increases with a
poor connection to the slug and ground. This reduces the
lifetime of the device.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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February 18, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200510 Rev. H