sky73085-11 Skyworks Solutions, Inc., sky73085-11 Datasheet - Page 9

• Manufacturer Part Number: sky73085-11
• Description: Sky73085-11 390 ? 500 Mhz High Gain And Linearity Diversity Downconversion Mixer For 2g/3g Base Station Transceiver Applications
• Manufacturer: Skyworks Solutions, Inc.

Evaluation Board Description
The SKY73085-11 Evaluation Board is used to test the
performance of the SKY73085-11 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 29
and the layer detail is provided in Figure 30. A schematic diagram
of the SKY73085-11 Evaluation Board is shown in Figure 31.
Circuit Design Configurations
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 SKY73085-11 has special electrical
3. Skyworks recommends including external bypass capacitors
4. Components L5, L6, L14, and L15 (see Figure 31) are high-Q
5. Components R1 and R2 (see Figure 31) set the bias current
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 possible
from the device. Therefore, design the connection to the
ground pad to dissipate the maximum wattage produced by
the circuit board.
on the VCC voltage inputs of the device.
low loss inductors. These inductors must be able to pass
currents in excess of 200 mA DC.
for the IF amplifiers. Skyworks recommends that these
resistors have a tolerance of ±1% to optimize performance
consistency of the SKY73085-11. These resistors are not
required for the Evaluation Board to operate as specified in
Tables 3 and 4.
200990B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 1, 2009
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
Package Dimensions
The PCB layout footprint for the SKY73085-11 is provided in
Figure 32. Figure 33 shows the package dimensions for the
36-pin MCM and Figure 34 provides the tape and reel
dimensions.
Package and Handling Information
Since the device package is sensitive to moisture absorption, it is
baked and vacuum packed before shipping. Instructions on the
shipping container label regarding exposure to moisture after the
container seal is broken must be followed. Otherwise, problems
related to moisture absorption may occur when the part is
subjected to high temperature during solder assembly.
THE SKY73085-11 is rated to Moisture Sensitivity Level 3 (MSL3)
at 260 °C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
PCB Design & SMT Assembly/Rework Guidelines for MCM-L
Packages, document number 101752.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format. For packaging details, refer to the Skyworks
Application Note, Tape and Reel, document number 101568.
Electrostatic Discharge (ESD) Sensitivity
The SKY73085-11 is a static-sensitive electronic device. Do not
operate or store near strong electrostatic fields. Take proper ESD
precautions.
DATA SHEET • SKY73085-11 DOWNCONVERSION MIXER
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