SKY73033-11_09 Datasheet, PDF (8/14 Pages) Skyworks Solutions Inc. – 1700 – 2200 MHz High Gain and Linearity Single Downconversion Mixer for 2G/3G Base Station Applications

DATA SHEET • SKY73033-11 DOWNCONVERSION MIXER
18
17
4.75 V
16
5.00 V
5.25 V
15
14
13
12
11
10
9
8
1710
1740
1770
1800
1830 1860
1920
1950
1950
1980
RF Frequency (MHz)
Figure 17. Mixer IP1dB vs Frequency and Supply Voltage
18
17
–3 dBm
0 dBm
16
+3 dBm
15
14
13
12
11
10
9
8
1710
1740
1770
1800
1830
1860
1890
1920
1950
1980
RF Frequency (MHz)
Figure 19. Mixer IP1dB vs Frequency and LO Power
Evaluation Board Description
The SKY73033-11 Evaluation Board is used to test the
performance of the SKY73033-11 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 21
and the layer detail is provided in Figure 22.
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 SKY73033-11 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
18
17
–40 ^oC
+25 ^oC
16
+85 ^oC
15
14
13
12
11
10
9
8
1710 1740 1770
1800 1830
1860
1890 1920 1950 1980
RF Frequency (MHz)
Figure 18. Mixer IP1dB vs Frequency and Temperature
50
48
–40 ^oC
+25 ^oC
46
+85 ^oC
44
42
40
38
36
34
32
30
1710 1740
1770
1800 1830 1860
1890 1920 1950 1980
RF Frequency (MHz)
Figure 20. Mixer LO1 to LO2 Isolation vs Frequency and
Temperature
SKY73033-11, 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 and L4 (see Figure 23) are high-Q, low loss
inductors. These inductors must be able to pass currents in
excess of 200 mA DC.
5. Components R7 and R8 (see Figure 23) allow for external
adjustment of the IF amplifier bias points. To reduce the IF
amplifier bias current, connect pin 20 to ground through
external resistor R8. To increase the IF amplifier bias current,
connect pin 20 to VCC through external resistor R7. For
operation as specified in Tables 3 and 4, these resistors are
not required.
A schematic diagram for the SKY73033-11 Evaluation Board is
shown in Figure 23.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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September 30, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200635D