SKY85736-11 Datasheet, PDF (6/13 Pages) Skyworks Solutions Inc. – 5 GHz WLAN Front-End Module

DATA SHEET • SKY85736-11: 5 GHz WLAN FRONT-END MODULE
Evaluation Board Description
The SKY85736-11 Evaluation Board is used to test the
performance of the SKY85736-11 FEM. A suggested application
schematic diagram is shown in Figure 3. A photograph of the
Evaluation Board is shown in Figure 4. Table 6 provides the Bill of
Materials (BOM) list for Evaluation Board components.
Evaluation Board Setup Procedure
1. Place jumpers between J4 and J6 at pins 6, 8, 9, and 10.
2. Apply 5 V to pins 2 and 3 of the J5 header (pin 1 ground).
3. Select a path according to the information in Table 5
(L = 0 V, H = 3 V), either by placing jumpers at the J4 pins 4,
5, and 7, or applying signals from a controller.
4. Detector output can be measured on pin 1 of J4.
Circuit Design Considerations
The following design considerations are general in nature and
must be followed regardless of final use or configuration:
 Paths to ground should be made as short as possible.
 The ground pad of the SKY85736-11 has special electrical and
thermal grounding requirements. This pad is the main thermal
conduit for heat dissipation. Because 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. Multiple
vias to the grounding layer are required.
 TX_IN is DC shorted to GND. There is no DC leaking from the
chip, but if there is DC on the line interfacing with the TX_IN
pin, a 10 pF blocking capacitor is recommended.
 ANT, RX_OUT, and LNA_IN are DC blocked and do not require
blocking capacitors.
 LNA_OUT is DC blocked but if there is > 1.5 V DC on the line
connected to the LNA_OUT pin, a 10 pF blocking capacitor is
recommended.
NOTE: A poor connection between the ground pad and ground
increases junction temperature (TJ), which reduces the life
of the device.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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February 13, 2017 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203603F