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SKY65028-70LF Datasheet(PDF) 6 Page - Skyworks Solutions Inc.

Part No. SKY65028-70LF
Description  450 MHz-2.5 GHz Linear Power Amplifier Driver
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Maker  SKYWORKS [Skyworks Solutions Inc.]
Homepage  http://www.skyworksinc.com
Logo SKYWORKS - Skyworks Solutions Inc.

SKY65028-70LF Datasheet(HTML) 6 Page - Skyworks Solutions Inc.

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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
July 31, 2006 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200445 Rev. B
DATA SHEET • SKY65028-70LF
6
Evaluation Board Description
The Skyworks SKY65028-70LF Evaluation Board is used to test
the performance of the SKY65028-70LF power amplifier driver.
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 SKY65028-70LF power amplifier 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 amplifier. As such, design the connection to the
ground pad to dissipate the maximum wattage produced to the
circuit board. Multiple vias to the grounding layer are required.
NOTE: Junction temperature (TJ) of the device increases with a
poor connection to the slug and ground. This reduces the
lifetime of the device.
Testing Procedure
Use the following procedure to set up the SKY65028-70LF
Evaluation Board for testing:
1. Connect a 5.0 V supply to VCC. If available, enable the current
limiting function of the power supply to 240 mA.
2. Connect a signal generator to the RF signal input port. Set it to
the desired RF frequency at a power level of -15 dBm or less
to the evaluation board but do NOT enable the RF signal.
3. Connect a spectrum analyzer to the RF signal output port.
4. Enable the power supply.
5. Enable the RF signal.
6. Take measurements.
CAUTION: If any of the output signals exceed the rated maximum
values, the SKY65028-70LF evaluation board can be
permanently damaged.
R3
R2
R1
C7
C1 C2
C3
C8
C9
C5
C6
C4
L2
L1
J1 (RF In)
JP1
J2 (RF Out)
Evaluation Board Assembly
Layer 3: Ground
Layer 4: Solid Ground Plane
Layer 1: Top - Metal
Layer 2: Ground
Evaluation Board Layer Detail


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