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CX65003 Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers

No. de pieza CX65003
Descripción Electrónicos  1400 - 2500 MHz Linear Power Amplifier Driver
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DATA SHEET • CX65003
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
6
October 11, 2004 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 101468E
30
35
40
45
50
2300
2350
2400
2450
2500
Freq (MHz)
-40C
25C
85C
Figure 15. Typical OIP3 From 2.3 to 2.5 GHz Over Temperature
(Circuit Match for Optimum OIP3)
-65
-60
-55
-50
-45
-40
10
12
14
16
18
20
22
Pout (dBm)
Figure 17. Typical ACLR vs POUT @ 2.14 GHz, 5 MHz Offset, 25
°C
(Circuit Match for Optimum ACPR)
30
35
40
45
50
55
-5
-4
-3
-2
-1
0
Pin (dBm)
-40C
25C
85C
Figure 16. Typical OIP3 vs PIN @ 1960 MHz Over Temperature
(Circuit Match for Optimum OIP3)
-70
-65
-60
-55
-50
-45
-40
11
13
15
17
19
21
23
Pout (dBm)
Figure 18. Typical ACPR vs POUT @ 1.96 GHz, 885 kHz Offset,
25
°C (Circuit Match for Optimum ACPR)
Evaluation Board Description
The CX65003 Evaluation Board is used to test the performance of
the CX65003 power amplifier driver. An Evaluation Board
schematic diagram, optimized for the 3rd Order Output Intercept
Point (OIP3), is shown in Figure 19. A schematic diagram
optimized for Adjacent Channel Power Rejection (ACPR) is
provided in Figure 20. The Evaluation Board assembly diagram is
shown in Figure 21 and the Evaluation Board layer detail is shown
in Figure 22. The mounting footprint for the CX65003 is shown in
Figure 23.
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 as possible.
2. The ground pad of the CX65003 power amplifier has special
electrical and thermal grounding requirements. 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 amplifier. As such, design the connection to
the ground pad to dissipate the maximum wattage produced
to the circuit board. Multiple vias to the grounding layer are
required.
NOTE: Junction temperature (TJ) of the device increases with a
poor connection to the slug and ground. This reduces the
lifetime of the device.
3. External bypass capacitors are required on the VCC line and
on pins 4, 5, and 8.
4. Bias resistor R1 is used to control the reference voltage of the
bias circuit (VCC1) at pin 8.
5. Inductor L1 is placed between the bias circuit output (pin 4)
and the base of RF transistor (pin 2) for bias circuit and RF
transistor connection.
Suggested matching circuits are shown in Figures 19 and 20.


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