SKY73020 Skyworks Solutions, SKY73020 Datasheet - Page 11

• Manufacturer Part Number: SKY73020
• Description: High Gain and Linearity Diversity Downconversion Mixer
• Manufacturer: Skyworks Solutions

Evaluation Board Description
The SKY73020 Evaluation Board is used to test the performance
of the SKY73020 downconversion mixer. An assembly drawing for
the Evaluation board is shown in Figure 41 and the layer detail is
provided in Figure 42.
Circuit Design Considerations
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 and as low
2. The ground pad of the SKY73020 provides critical electrical
Figure 37. Channel A RF-to-IF Isolation vs Frequency and Supply
www.DataSheet4U.com
Figure 39. Channel A LO1-to-RF Leakage vs Frequency and
impedance as possible.
and thermal functionality. 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
–40
–42
–44
–46
–48
–50
–52
–54
–56
80
78
76
74
72
880
880
200362D • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • November 6, 2006
885
885
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
890
890
Supply Voltage
Voltage
Frequency (MHz)
Frequency (MHz)
895
895
900
900
905
905
910
910
4.75 V
5.00 V
5.25 V
4.75 V
5.00 V
5.25 V
915
915
3. Skyworks recommends including external bypass capacitors
4. Components L5, L6, L14, and L15 (see Figure 3) are high-Q,
5. Components R1 and R2 (see Figure 3) allow for external
A schematic diagram for the SKY73020 Evaluation Board is
shown in Figure 43.
PRELIMINARY DATA SHEET • SKY73020 DOWNCONVERSION MIXER
Figure 40. Channel A LO1-to-RF Leakage vs Frequency and
pad to dissipate the maximum heat produced by the circuit
board. For more information on soldering the SKY73020, refer
to the Package and Handling Information section of this Data
Sheet.
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.
adjustment of the IF amplifier bias points. For operation as
specified in Tables 3 and 4, these resistors are not required.
Figure 38. Channel A RF-to-IF Isolation vs Frequency and
–40
–42
–44
–46
–48
–50
–52
–54
–56
80
78
76
74
72
880
880
885
885
890
890
Temperature
Temperature
Frequency (MHz)
Frequency (MHz)
895
895
900
900
905
905
910
910
25
85
0
25
85
o
o
o
C
C
C
0
o
o
o
C
C
C
915
915
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