SKY73022-11 Datasheet, PDF (5/12 Pages) Skyworks Solutions Inc. – 700 - 1000 MHz High Gain and Linearity Diversity Downconversion Mixer for 2G/3G Base Station Applications

PRELIMINARY DATA SHEET • SKY73022-11 DOWNCONVERSION MIXER
Evaluation Board Description
The SKY73022-11 Evaluation Board is used to test the
performance of the SKY73022-11 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 3
and the layer detail is provided in Figure 4.
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 and as low
impedance as possible.
2. The ground pad of the SKY73022-11 provides critical
electrical 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 pad to dissipate the maximum heat produced by the
circuit board. For more information on soldering the
SKY73022-11, refer to the Package and Handling Information
section of this Data Sheet.
3. Skyworks recommends including external bypass capacitors
on the VCC voltage inputs of the device.
4. Components L5, L6, L14, and L15 (see Figure 5) are high-Q,
low loss inductors. These inductors must be able to pass
currents in excess of 200 mA DC.
5. Components R1 and R2 (see Figure 5) allow for external
adjustment of the IF amplifier bias points. For operation as
specified in Tables 3 and 4, these resistors are not required.
A schematic diagram for the SKY73022-11 Evaluation Board is
shown in Figure 5.
J9
J5
J4
J1
J7
C34
C35 C29
C28
L16 L17 _R4
L13 L12
C25
L1
C2 L2
C32
T2
C33
C26 ^C39
R2
C24 _L11
J8
C3
L14
C38
L15 _C27
R5
C1
C4
C5
C8
C23
C20
C22
C21
J2
C17
C7
C6 L4
C41
L5
R6 R1
L6 ^C14
C40
C18
C13
L10
L3
C12
T1
C11
C19
J3
R3
L18 L19
L8 L9
C36 C37
C15 C16
J10
J6
S905
Figure 3. SKY73022-11 Evaluation Board Assembly Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200518C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 16, 2007
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