SKY73021-11 SKYWORKS [Skyworks Solutions Inc.], SKY73021-11 Datasheet - Page 10

• Manufacturer Part Number: SKY73021-11
• Description: 1700 - 2200 MHz High Gain and Linearity Diversity Downconversion Mixer for 2G/3G Base Station Transceiver Applications
• Manufacturer: SKYWORKS [Skyworks Solutions Inc.]

PRELIMINARY DATA SHEET • SKY73021 DOWNCONVERSION MIXER
Evaluation Board Description
The SKY73021 Evaluation Board is used to test the performance
of the SKY73021 downconversion mixer. An assembly drawing for
the Evaluation Board is shown in Figure 36 and the layer detail is
provided in Figure 37.
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
2. The ground pad of the SKY73021 provides critical electrical
10
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
April 13, 2007 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200450B
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
J4
J7
J1
Figure 36. SKY73021 Evaluation Board Assembly Diagram
L3
C6
C2
L1
L2
C7
L4
C3
J10
J9
L16
C34
C41
L18
C36
C8
C5
C1
L17
C38
L19
C4
C32
C12
R4
L14
R3
C37
L5
C35
T2
T1
C29
L15
C15
L6
3. Skyworks recommends including external bypass capacitors
4. Components L5, L6, L14, and L15 (see Figure 38) are high-Q,
5. Components R1 and R2 (see Figure 38) allow for external
A schematic diagram for the SKY73021 Evaluation Board is
shown in Figure 38.
C33
C11
L13
C20
L8
C14
C27
C23
C17
pad to dissipate the maximum heat produced by the circuit
board. For more information on soldering the SKY73021, 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.
C26
C13
C16
R5
R6
C28
L9
C21
L12
J5
R2
C39
J6
R1
C40
C18
C24
C22
C25
L10
L11
C19
J2
J8
J3
S905