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DATA SHEET
CX65105: 1700 - 2200 MHz Linear Power Amplifier
Applications
* PCS/DCS/UMTS * Repeaters * WLL and ISM bands * Mobile radio * Telematics
Description
Skyworks CX65105 Power Amplifier (PA) is a fully matched, 8-pin Leadless Chip Carrier (LCC) surface mount module, developed for Personal Communications System (PCS), Digital Communications System (DCS), and Universal Mobile Telephone System (UMTS) applications. Wireless Local Loop (WLL) and Industrial, Scientific, Medical (ISM) applications are also supported. This small, power-efficient PA has a full 1700 to 2200 MHz bandwidth coverage packed into a single compact package. All active circuitry in the module is contained in a single Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC). The CX65105 is manufactured with Skyworks Aluminum (Al) GaAs Heterojunction Bipolar Transistor (HBT) process, which allows for single supply operation while maintaining high efficiency and good linearity. The 8-pin Leadless Chip Carrier (LCC) device package and pinout are shown in Figure 1. Figure 2 shows a functional block diagram for the CX65105. Signal pin assignments and functional pin descriptions are provided in Table 1.
Features
* Typical POUT of 28.5 dBm * High linearity * Low power consumption * Single +5 V supply * LCC (8-pin, 8 x 8 mm) package
VREF
3
VCC1
8
VCC2
4
VCC1
8 GND RFIN VREF 1 2 3 4 7 6 5 GND RFOUT
RFIN
2
Driver Stage Bias
Power Stage Bias
Input Match
PA
Interstage Match
PA
Output Match
6
RFOUT
GND
MMIC Module GND
1, 5, 7
C1220
VCC2
S384
Figure 1. CX65101 Pinout- 8-Pin LCC Package (Top View)
Figure 2. CX65105 Functional Block Diagram
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DATA SHEET * CX65105
Table 1. CX65105 Signal Descriptions
Pin # 1 2 3 4 GND RFIN VREF VCC2 Name Ground RF input Reference voltage Supply voltage Description Pin # 5 6 7 8 GND RFOUT GND VCC1 Name Ground Rf output Ground Supply voltage Description
Technical Description
The CX65105 is comprised of two amplifier stages. The matching circuits for the input stage, inter-stage, and output stage are contained within the device. The bias circuits for both input and output stages are included within the device for optimum temperature tracking performance. The CX65105 is internally matched for optimum linearity and efficiency. The input and output stages are independently supplied using the VCC1 and VCC2 supply lines, pins 8 and 4 respectively. The bias reference voltage is supplied using a common VREF (pin 3) line.
ensure that the part is not subjected to a temperature that exceeds 300 C for more than 10 seconds. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. For packaging details, refer to the Skyworks Application Note, Tape and Reel, document number 101568.
Electrical and Mechanical Specifications
The absolute maximum ratings of the CX65105 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Typical performance characteristics over temperature of the CX65105 are illustrated in Figures 3 through 8. Figure 13 shows the package dimensions for the 8-pin CX65105 LCC and Figure 14 provides the tape and reel dimensions.
Package and Handling Information
Since the device package is sensitive to moisture absorption, it is baked and vacuum packed before shipping. Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. If the part is attached in a reflow oven, the temperature ramp rate should not exceed 5 C per second. Maximum temperature should not exceed 225 C and the time spent at a temperature that exceeds 210 C should be limited to less than 10 seconds. If the part is manually attached, precaution should be taken to
Electrostatic Discharge (ESD) Sensitivity
The CX65105 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions.
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DATA SHEET * CX65105
Table 2. CX65105 Absolute Maximum Ratings
Parameter RF input power Supply voltage Reference voltage Case operating temperature Storage temperature
Note:
Symbol PIN VCC VREF TC TST
Min
Typical
Max 7 6 4
Units dBm V V C C
-40 -55
+85 +125
Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal values.
Table 3. CX65105 Recommended Operating Conditions
Parameter Supply voltage Reference voltage Operating frequency VCC VREF FO 1700 Symbol Min Typical 5 3.6 1900 2200 Max Units V V MHz
Table 4. CX65105 Electrical Characteristics (VCC = 5.0 V, VREF = 3.6 V, Frequency = 1900 MHz, TC = 25 C, unless otherwise noted)
Parameter Analog Inputs Frequency range Quiescent current Small signal gain Output power Efficiency Noise Figure (NF) Output IP3 IQ G POUT PAE NF OIP3 Two tones with 100 kHz spacing, PIN = 0 dBm per tone f = 1960 MHz f = 2140 MHz 36 PIN = -15 dBm PIN = 5 dBm PIN = 5 dBm 23.5 27 25 1700 1900 143 25.0 28.5 30 6 40 7 2200 185 MHz mA dB dBm % dB dBm Symbol Test Conditions Min Typical Max Units
POUT @ ACPR = -45 dBc POUt @ ACLR = -45 dBc
Note:
POUT_ACPR POUT_ACLR
22 18
24 20
dBm dBm
The above specifications apply only to the 1900 MHz operating frequency.
31 30 29
36 34 32 30
Pout (dBm)
PAE (%)
28 27 26 25 24 2 3 4 5 6 7
-30C 25C 85C
28 26 24 22 20 18 16 2 3 4 5 6 7
85C 25C -30C
Pin (dBm)
Pin (dBm)
Figure 3. Typical POUT vs PIN Over Temperature
Figure 4. Typical PAE vs PIN Over Temperature
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DATA SHEET * CX65105
30
8 7 6
Small Signal Gain (dB)
25 20
85C
NF (dB)
5
85C
15 10 5 0 1700 1800 1900 2000 2100 2200
25C -30C
4 3 2 1 0 1700 1800 1900 2000 2100 2200
25C -30C
Freq (MHz)
Freq (MHz)
Figure 5. Typical Small Signal Gain vs Frequency Over Temperature
Figure 6. Typical Noise Figure vs Frequency Over Temperature
50
35 30
40 25
OIP3 (dBm)
30
Pout (dBm)
85C 25C
20 15 10
-30C 25C 85C
20
-30C
10 5 0 1700 1800 1900 2000 2100 2200 0 1700 1800 1900 2000 2100 2200
Freq (MHz)
Freq (MHz)
Figure 7. Typical OIP3 vs Frequency Over Temperature
Figure 8. Typical POUT vs Frequency Over Temperature
Evaluation Board Description
Skyworks CX65105 Evaluation Board is used to test the performance of the CX65105 PA. The Evaluation Board schematic diagram is shown in Figure 9. The schematic shows the basic design of the board for the 1700 to 2200 MHz range. Figure 10 provides the Evaluation Board assembly diagram. Figure 11 provides the Evaluation Board layer detail. 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 as possible. 2. The ground pad of the CX65105 PA 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.
3. Two external output bypass capacitors (0.01 F and 4.7 F) are required on the VCC1 (pin 8) supply input. The same two capacitors are also required on the VCC2 (pin 4) supply input. Both capacitors should be placed in parallel between the supply line and ground. Also, a bypass capacitor of 0.01 F is required on the VREF input (pin 3). See Figure 9 for a detailed diagram. 4. VCC1 (pin 8) and VCC2 (pin 4) may be connected together at the supply. 5. At the RF input (pin 2), a DC blocking capacitor is required. 6. The RF output includes an onboard internal DC blocking capacitor. All impedance matching is provided internally. Therefore, the application only needs to provide a good 50 load. Testing Procedure Use the following procedure to set up the CX65105 Evaluation Board for testing. Refer to Figure 12 for guidance:
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DATA SHEET * CX65105
1. Connect a +5.0 V supply voltage to VCC1 and VCC2, and +3.6 V supply voltage to VREF. If available, enable the current limiting function of the power supplies to 1.0 A for the +5.0 V supply current and 30 mA for the +3.6 V supply current. 2. Connect a signal generator to the RF signal input port. Set it to the desired RF frequency at a power level of 7 dBm or less to the Evaluation Board but do NOT enable the RF signal. 3. Connect a spectrum analyzer to the RF signal output port. 4. Enable the power supply.
5. Enable the RF signal. 6. Take measurements. CAUTION: If the input signal exceeds the rated power, the CX65105 Evaluation Board can be permanently damaged.
+5 V C1 0.01 F
VCC1 8 1
C2 4.7 F
T1 RF in C5 4.7 pF
T2 50 microstrip
7
T3 50 microstrip
RF out
RFIN VREF
2 3 4
6 5
RFOUT
C6 0.01 F
VCC2
C3 0.01 F
Pin 9 Package Base
+3.6 V
Notes: 1) Pin 9 provides both a thermal and electrical ground. This ground path is critical and must be as short as possible. 2) Transmission line lengths T1 and T2 should be minimized.
C4 4.7 F +5.0 V
C1237d
Figure 9. Evaluation Board Schematic, 1700 MHz to 2200 MHz
C1
8x8 PA EVALUATION BD.
C2
C5 C6
J1 (RF In)
C3
J2 (RF Out)
C4
VCC1
VCC2
VREF
GND
GND
GND
J3
C1257b
Figure 10. Evaluation Board Assembly Diagram
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DATA SHEET * CX65105
Layer 1: Top - Metal
Layer 2: Inner Traces
Layer 3: Solid Ground Plane
C1253d
Figure 11. Evaluation Board Layer Detail
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DATA SHEET * CX65105
Power Supply
Signal Generator
Input
CX65105 Evaluation Board
Output
Power Meter or Spectrum Analyzer
C1240d
Figure 12. CX65105 Evaluation Board Testing Configuration
1.955 0.155
1.45 0.10
Pin 8
Pin 1
Pin 7
8.385 0.125
Pin 2
7.875 0.075
Pin 6
Pin 3
Pin 5
Pin 4
8.385 0.125
0.51 0.05
7.875 0.075
3.30 (2X) 1.65 (2X) 3.30 (2X) 0.81 (12X)
DETAIL A
Note: pin 1 connects to ground
R.20 (8X) 3.99 3.94
Pin 9
R 2.54
1.91 (2X)
1.91 (2X)
SEE DETAIL A
0.61 (12X) 1.65 (2X) 3.99
3.94
COPPER BOTTOM
The bottom solder mask thickness = 0.063 maximum All measurements are in millimeters
SOLDER MASK BOTTOM
C1201
Figure 9. CX65105 8-Pin LCC Package Dimensions
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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DATA SHEET * CX65105
12.00 0.10 1.50 0.10 2.00 0.10
4.00 0.10
B
Pin #1
1.75 0.10
A
A
7.50 0.10
16.00 +0.30/-0.10
B
8o Max
1.50 0.25 5o Max 0.318 0.013
Notes: 1. Carrier tape: black conductive polystyrene. 2. Cover tape material: transparent conductive PSA. 3. All measurements are in millimeters.
8.89 0.10
8.88 0.10
2.14 0.10
A
B
C1221
Figure 10. CX65105 8-Pin LCC Tape and Reel Dimensions
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DATA SHEET * CX65105
Ordering Information
Model Name CX65105 1700-2200 MHz Linear Power Amplifier Manufacturing Part Number CX65105-11 TW10-D842 Evaluation Kit Part Number
Copyright (c) 2001, 2002, 2004, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its documentation, products, specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from future changes to its documentation, products, specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by or under this document. Except as may be provided in Skyworks Terms and Conditions of Sale for such products, Skyworks assumes no liability whatsoever in association with its documentation, products, specifications and product descriptions. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED OR OTHERWISE, RELATING TO SALE AND/OR USE OF SKYWORKS PRODUCTS INCLUDING WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. SKYWORKS FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THESE MATERIALS WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. The following are trademarks of Skyworks Solutions, Inc.: SkyworksTM, the Skyworks logo, and Breakthrough SimplicityTM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of Skyworks or other third parties. Third-party brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is incorporated by reference.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
101476F * Skyworks Proprietary and Confidential information * Products and Product Information are Subject to Change Without Notice * October 15, 2004
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