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CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
The CX77105, a dual-mode, Code Division Multiple Access (CDMA) / Advanced Mobile Phone Service (AMPS) Power Amplifier Module (PAM), is a fully matched, 10-pin surface mount module developed for cellular handsets and wireless local loop applications. This small and efficient power amplifier module packs a full 824-849 MHz bandwidth coverage into a single compact package. The device meets the stringent IS95 CDMA linearity requirements to and exceeding 28 dBm output power, and can be driven to levels beyond 31 dBm for high efficiency in FM mode operation. A low current digital pin (VCONT) provides improved efficiency for the low RF power range of operation.
Distinguishing Features
* Low voltage positive bias supply (3.2 V to 4.2 V, typical) Good linearity High efficiency Dual mode operation Large dynamic range 10-pin package (4 x 4 x 1.5 mm) Power down control Low power-state control InGaP IS 95/CDMA2000
* * * * * * The single Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) * contains all active circuitry in the module. The MMIC contains on-board bias circuitry, * as well as input and interstage matching circuits. The output match is realized off-chip *
and within the module package to optimize efficiency and power performance into a 50 load. This device is manufactured with Skyworks' GaAs Heterojunction Bipolar Transistor (HBT) process that provides for all positive voltage DC supply operation while maintaining high efficiency and good linearity. Primary bias to the CX77105 is supplied directly from a three-cell nickel cadmium, a single-cell lithium ion, or other suitable battery with an output in the 3-4 volt range. Power down is accomplished by setting the voltage on the low current reference pin to zero volts. No external supply side switch is needed as typical "off" leakage is a few microamperes with full primary voltage supplied from the battery.
Applications
* * * Digital cellular (CDMA) Analog cellular (AMPS) Wireless local loop (WLL)
Functional Block Diagram
VREF (1) VCC1 (5) VCONT (2) VCC2 (6)
Driver Stage Bias
Power Stage Bias
RF IN (4)
Input Match
DA
Inter Stage Match
PA
Output Match
(8) RF OUT
MMIC
MODULE
(3, 7, 9, 10) GND (3, 7, 9, 10) GND
Data Sheet (c) 2001, 2002 Skyworks Solutions, Inc., All Rights Reserved.
101787A December 10, 2002
Electrical Specifications
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Electrical Specifications
The following tables list the electrical characteristics of the CX77105 Power Amplifier. Table 2 lists the recommended operating conditions for achieving the electrical performance listed in Table 4. Table 3 lists the electrical performance of the CX77105 Power Amplifier over the recommended operating conditions.
Table 1. Absolute Maximum Ratings(1) Parameter
RF Input Power Supply Voltage Reference Voltage Case Operating Temperature Storage Temperature
NOTE(S):
(1)
Symbol
PIN VCC VREF TC TSTG
Minimum
-- -- -- -30 -55
Nominal
4.0 3.4 3.0 25 --
Maximum
7.0 6.0 3.1 +110 +125
Unit
dBm Volts Volts
o o
C C
No damage assuming only one parameter is set at limit at a time with all other parameters set at or below nominal value.
Table 2. Recommended Operating Conditions Parameter
Supply Voltage PA On Reference Voltage PA Off High Bias Mode Input Impedance >2.5 k Low Bias Operating Frequency Operating Temperature VCONT FO TO 2.5 824.0 -30 -- 836.5 -- 3.0 849.0 +85 MHz C VREF VCONT -- 0.0 -- -- 0.5 0.5 Volts
Symbol
VCC VREF
Minimum
3.2 2.95
Nominal
3.4 3.0
Maximum
4.2 3.05
Unit
Volts Volts
Table 3. Power Range Truth Table Power Mode
High Power Low Power Shut Down
VREF
3.0 V 3.0 V 0.0 V
VCONT
0.0-0.5 V 2.5-3.0 V 0.0 V
Range
16 dBm-28 dBm 16 dBm --
2
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Table 4. Electrical Specifications for CDMA / AMPS Nominal Operating Conditions(1) Characteristics
Digital Mode Gain conditions Analog Mode Digital Mode Power Added Efficiency Analog Mode Total Supply Current Quiescent Current Reference Current Control Current Total Supply current in Power-down Mode 885 kHz offset Adjacent Channel Power(2)(3) 1.98 MHz offset
Electrical Specifications
Symbol
GLOW GHIGH GP PAELOW PAEHIGH PAEa ICC_LOW ICC_HIGH IQ_LOW IQ_HIGH IREF ICTRL IPD ACP1LOW ACP1HIGH ACP2LOW
Condition
VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm VCONT 0.5 V PO = 31 dBm VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm VCONT 0.5 V PO = 31 dBm PO = 16 dBm PO = 28 dBm VCONT 2.5 V VCONT 0.5 V -- VCONT = 2.5 V VCC = 3.4 V VREF = 0 V VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm VCONT 2.5 V PO 16 dBm or VCONT 0.5 V PO 28 dBm PO 28 dBm PO 28 dBm
Minimum
25.0 28.5 27.5 7.6 37.0 48.0 -- -- 40 60 -- 200 -- -- -- --
Typical
27.0 29.0 29.0 8.5 40.0 55.0 137 490 55 78 2.5 235 3.0 -49.0 -50.0 -65.0
Maximum
28.0 31.0 31.0 -- -- -- 153 500 75 105 5.0 500 5.0 -47.3 -47.0 -59.0
Unit
dB
%
mA mA mA A A
dBc
ACP2HIGH FO2 FO3
-- -- --
-60.0 -38.0 -59.0
-57.4 -35.0 dBc -45.0
Harmonic Suppression
Secon d Third
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Electrical Specifications
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Table 4. Electrical Specifications for CDMA / AMPS Nominal Operating Conditions(1) Characteristics
Noise Power in RX Band 869-894 MHz Noise Figure Input Voltage Standing Wave Ratio Stability (Spurious output) Ruggedness--No damage(4)
NOTE(S):
(1) (2)
Symbol
RxBN NF VSWR S Ru
Condition
PO 28 dBm -- -- 5:1 VSWR all phases PO 28 dBm
Minimum
-- -- -- -- 10:1
Typical
-137 4.6 -- -- --
Maximum
-- 5.0 1.9:1 -60.0 --
Unit
dBm/Hz dB -- dBc VSWR
VCC = +3.4 V, VREF = +3.0 V, Freq = 836.5 MHz, TC = 25 C, unless otherwise specified. ACP is specified per IS95 as the ratio of the total in-band power (1.23 MHz BW) to adjacent power in a 30 kHz BW. (3) CDMA2000 is configured as DCCH = 9600, SCHO = 9600, PCH (Walsh 0) = - 3.75 dB, and Peak-to-Average Ratio (CCDF = 1%) = 4.5 dB. For CDMA2000, 0.5 dB back-off in output power is required. (4) All phases, time = 10 seconds.
Table 5. Electrical Specifications for CDMA / AMPS Recommended Operating Conditions(1) Characteristics
Digital Mode Gain conditions Analog Mode 1.25 MHz offset Adjacent Channel Power(2)(3) 1.98 MHz offset ACP2HIGH Second Harmonic Suppression Third FO3 FO2
Symbol
GLOW GHIGH GP ACP1LOW ACP1HIGH ACP2LOW
Condition
VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm VCONT 0.5 V PO = 31 dBm VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm VCONT 2.5 V PO 16 dBm or VCONT 0.5 V PO 28 dBm PO 28 dBm PO 28 dBm
Minimum
24.0 27.1 24.0 -- -- --
Maximum
28.5 32.4 33.0 -44 -44 -56
Unit
dB
dBc dBc dBc
-- -- --
-56 -30 -40
dBc dBc dBc
4
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Table 5. Electrical Specifications for CDMA / AMPS Recommended Operating Conditions(1) Characteristics
Noise Power in RX Band 869-894 MHz Noise Figure Input Voltage Standing Wave Ratio (VSWR) Stability (Spurious output) Ruggedness - No damage(4)
NOTE(S):
(1) (2)
Electrical Specifications
Symbol
RxBN NF VSWR S Ru
Condition
PO 28 dBm -- -- 5:1 VSWR All phases PO 28dBm
Minimum
-- -- -- -- 10:1
Maximum
-134.0 7.0 2.0:1 -60.0 --
Unit
dBm/Hz dB -- dBc VSWR
Per Table 2, unless otherwise specified. ACP is specified per IS95 as the ratio of the total in-band power (1.23 MHz BW) to adjacent power in a 30 kHz BW. (3) CDMA2000 is configured as DCCH = 9600, SCHO = 9600, PCH (Walsh 0) = -3.75 dB, and Peak-to-Average Ratio (CCDF = 1%) = 4.5 dB. For CDMA2000, 0.5 dB back-off in output power is required. (4) All phases, time = 10 seconds.
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Characterization Data
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Characterization Data
The following graphs illustrate the characteristics of a typical CX77105 power amplifier designed for operation in the cellular frequency band (824-849 MHz). This amplifier was selected by characterizing a group of devices and then selecting a part with average electrical performance for both nominal and the full range of recommended operating conditions, including worst case limits. Figures 1 through 7 illustrate the digital signal characteristics of the CX77105. Shown are power sweep characteristics for key performance parameters, over temperature and frequency, up to 28.5 dBm output power. The data was taken up to and including 16 dBm output power with the bias mode control pin setting of VCONT = 2.5 volts. Beyond 16 dBm output power, the VCONT was set to 0 volts.
Figure 1. Digital Mode Gain vs. Output Power
VREF = 3.0 V VCC = 3.4 V
35 34 33 32 31 30
Gain (dB)
29 28 27 26
+25 C +85 C
25 24 23 22 21 20 0 5 10 15 20 25 30
-30 C
VCONT > 2.5 V
VCONT < 0.5 V
Output Power (dBm)
101787_009
Legend 824 @ -30 C 30 837 @ -30 C 30 849 @ -30 C 30 824 @ +25 C 837 @ +25 C 849 @ +25 C 824 @ +85 C 837 @ +85 C 849 @ +85 C
6
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Figure 2. Primary Bias Current vs. Output Power
VREF = 3.0 V
600
Characterization Data
VCC = 3.4 V
500
400
Icc (mA)
VCONT > 2.5 V 300
VCONT < 0.5 V
200
100
0 0 5 10 15 20 25 30
Output Power (dBm)
101787_010
Figure 3. Power Added Efficiency vs. Output Power
VREF = 3.0 V VCC = 3.4 V
45
40
35
Power Added Efficiency (%)
30
25
VCONT > 2.5 V
20
VCONT < 0.5 V
15
10
5
0 0 5 10 15 20 25 30
Output Power (dBm)
101787_011
Legend 824 @ -30 C 30 837 @ -30 C 30 849 @ -30 C 30 824 @ +25 C 837 @ +25 C 849 @ +25 C 824 @ +85 C 837 @ +85 C 849 @ +85 C
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Characterization Data
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Figure 4. Adjacent Channel Power for 885 kHz Offset Current vs. Output Power
VREF = 3.0 V VCC = 3.4 V
80
75
Adjacent Channel Power Ratio
70
+8 5 C
65
+2 5
C
60
-3 0 C
VCONT > 2.5 V
VCONT < 0.5 V
55
50
45
40 0 5 10 15 20 25 30
Output Power (dBm)
101787_012
Figure 5. Adjacent Channel Power for 1.98 MHz Offset vs. Output Power
VREF = 3.0 V
90
Vcc = 3.4 V
Adjacent Channel Power Ratio (-dBc)
85
+8 5
80
C
+2 5 C
75
-3 0
C
70
65
60
VCONT > 2.5 V
VCONT < 0.5 V
55
50 0 5 10 15 20 25 30
Output Power (dBm)
Legend 824 @ -30 C 30 837 @ -30 C 30 849 @ -30 C 30 824 @ +25 C 837 @ +25 C 849 @ +25 C 824 @ +85 C 837 @ +85 C 849 @ +85 C
8
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Figure 6. Second Harmonic Rejection vs. Output Power
Characterization Data
VREF = 3.0 V VCC = 3.4 V
55
2nd Harmonic Rejection (-dBc)
50
45
40
35 VCONT > 2.5 V 30 0 5 10 15 20 25 30 VCONT < 0.5 V
Output Power (dBm)
101787_014
Figure 7. Third Harmonic Rejection vs. Output Power
VREF = 3.0 V VCC = 3.4 V
70
3rd Harmonic Rejection (-dBc)
65
60
55
VCONT > 2.5 V 50 0 5 10 15
VCONT < 0.5 V
20
25
30
Output Power (dBm)
101787_015
Legend 824 @ -30 C 30 837 @ -30 C 30 849 @ -30 C 30 824 @ +25 C 837 @ +25 C 849 @ +25 C 824 @ +85 C 837 @ +85 C 849 @ +85 C
101787A December 10, 2002
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Characterization Data
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Figure 8. Noise Figure as Function of Operating Conditions
7
824
6
836.5
849
COLD
ROOM TEMPERATURE
HOT
5
Noise Figure (dB)
4
3
2
1
0 3.2 V -30 C 3.4 V -30 C 4.2 V -30 C 3.2 V +25 C 3.4 V +25 C 4.2 V +25 C 3.2 V +85 C 3.4 V +85 C 4.2 V +85 C
Collector Voltage / Case Temperature
101787_016
Figure 9. Input VSWR as Function of Operating Conditions
2.0
824
1.9
836.5
849
COLD
1.8 1.7 1.6
ROOM TEMPERATURE
HOT
VSWR
1.5 1.4 1.3 1.2 1.1 1.0 3.2 V -30 C 3.4 V -30 C 4.2 V -30 C 3.2 V +25 C 3.4 V +25 C 4.2 V +25 C 3.2 V +85 C 3.4 V +85 C 4.2 V +85 C
Collector Voltage / Case Temperature
101787_017
10
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Evaluation Board Description
Evaluation Board Description
The evaluation board is a platform for testing and interfacing design circuitry. To accommodate the interface testing of the CX77105, the evaluation board schematic and diagrams are included for preliminary analysis and design. Figure 10 shows the basic schematic of the board for the 824 MHz to 849 MHz range.
Figure 10. Evaluation Board Schematic
VREF 1 VREF
C9 1000 pF
GND 10
2 VCONT VCONT
C3 1000 pF
GND 9 RF OUT
3 GND
RF OUT 8
RF IN 4 RF IN GND 7
5 VCC1
VCC2 6
VCC1
C6 10 F C7 0.1 F C4 1000 pF C5 330 pF
VCC2
101787_003
Figure 11. Evaluation Board Assembly Diagram
P1
RF IN
J1
GND VCC1
GND
CELLULAR 4X4
C7 C3
J2
GND VCT
U1 C9 C5 C4 C6
VCC2 GND
GND VREF
EN14-D1235-003 12/17/01
RF OUT
P2
101787_002
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Package Dimensions and Pin Descriptions
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Package Dimensions and Pin Descriptions
The CX77105 is a multi-layer laminate base, overmold encapsulated modular package designed for surface mount solder attachment to a printed circuit board. Figure 12 is a mechanical drawing of the pad layout for this package. The pin numbering convention starts with pin 1 in the upper left, as indicated in Figure 12, and increments counter-clockwise around the package. Table 6 describes each pin function and Figure 13 illustrates typical case markings.
Figure 12. CX77105 Package Dimensional Drawing
1.9 1.275 SOLDER MASK EDGES 1.275
1.0
1.7 0.85
0.4 0.05
0.1 1.9
0.4 0.05
DETAIL PAD
METAL PAD EDGES
A
A
R0.2 TOP VIEW
Note: Solder mask pattern pad layout as viewed from top looking through package.
0.48 0.45
PIN 1 INDICATOR 10 2 3 4 5 9 8 7 6 4 0.05 TOP VIEW 4 0.05
1.5 0.1
SIDE VIEW
All Dimensions in millimeters.
101787_004
12
Skyworks Solutions, Inc. Proprietary
101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Table 6. Pin Descriptions Pin #
1 2 3 4
NOTE(S):
(1) (2)
Package Dimensions and Pin Descriptions
Function
VREF VCONT GND RF IN
Pin #
5 6 7 8
Function
VCC1(1) VCC2(1) GND RF OUT
Pin #
9 10 GND PAD(2)
Function
GND GND GND
All supply pins may be connected together at the supply. GROUND PAD is package underside.
Figure 13. Typical Case Markings
SKYWORKS
Mark Pin 1 Identifier
CX77105-NN EXXXXX.XX YYWW MEX
Manufacturing Part Number-Revision Number Lot Number YY = Manufacture Year WW = Week Package Sealed MEX = Country Code
101787_006
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Package and Handling Information
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Package and Handling Information
Because of its sensitivity to moisture absorption, this device package is baked and vacuum packed prior to shipment. Instructions on the shipping container label must be followed regarding exposure to moisture after the container seal is broken, otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The CX77105 is capable of withstanding an MSL 3/240 C solder reflow. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. 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 240 C. If the part is manually attached, precaution should be taken to insure that the part is not subjected to temperatures exceeding 240 C for more than 10 seconds. For details on both attachment techniques, precautions, and handling procedures recommended by Skyworks, please refer to Application Note: PCB Design and SMT Assembly/Rework, Document Number 101752. Additional information on standard SMT reflow profiles can also be found in the JEDEC Standard J-STD-020B. Production quantities of this product are shipped in the standard tape-and-reel format. For packaging details, refer to Application Note: Tape and Reel, Document Number 101568.
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101787A December 10, 2002
CX77105
Power Amplifier Module for CDMA/AMPS (824-849 MHz)
Electrostatic Discharge Sensitivity
Electrostatic Discharge Sensitivity
The CX77105 is a Class I device. Figure 14 lists the Electrostatic Discharge (ESD) immunity level for each pin of the CX77105 product. The numbers in Figure 14 specify the ESD threshold level for each pin where the I-V curve between the pin and ground starts to show degradation. The ESD testing was performed in compliance with MIL-STD-883E Method 3015.7 using the Human Body Model. Since 2000 volts represents the maximum measurement limit of the test equipment used, pins marked > 2000 V pass 2000V ESD stress.
Figure 14. ESD Sensitivity Ares (Top View)
+ 1600 V VREF - 1400 V
1
10
GND
+ 1000 V VCONT - 1300 V
2
9
GND
GND
3
8
> + 2000 V RF OUT < - 2000 V
+ 2000 V - 2000 V RF IN
4 GROUND PAD
7
GND
+ 2000 V - 2000 V VCC1
5
6
VCC2
> + 2000 V < - 2000 V
101787_007
Various failure criteria can be utilized when performing ESD testing. Many vendors employ relaxed ESD failure standards which fail devices only after "the pin fails the electrical specification limits" or "the pin becomes completely non-functional". Skyworks employs most stringent criteria, fails devices as soon as the pin begins to show any degradation on a curve tracer. To avoid ESD damage, both latent and visible, it is very important that the product assembly and test areas follow the Class-1 ESD handling precautions listed in Table 7.
Table 7. Precautions for GaAs ICs with ESD Thresholds Greater Than 200 V But Less Than 2000 V
Personnel Grounding Wrist Straps Conductive Smocks, Gloves and Finger Cots Antistatic ID Badges Protective Workstation Dissipative Table Tops Protective Test Equipment (Properly Grounded) Grounded Tip Soldering Irons Conductive Solder Suckers Static Sensors Facility Relative Humidity Control and Air Ionizers Dissipative Floors (less than 109 to GND) Protective Packaging & Transportation Bags and Pouches (Faraday Shield) Protective Tote Boxes (Conductive Static Shielding) Protective Trays Grounded Carts Protective Work Order Holders
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Ordering Information
Model Number CX77105 Manufacturing Part Number CX77105-16P Product Revision 16 Package 4x4LM-10 Operating Temperature -30 C to +85 C
Revision History
Revision A Level Date December 10, 2002 Initial Release Description
References
Application Note: PCB Design and SMT Assembly/Rework, Document Number 101752. Application Note: Tape and Reel, Document Number 101568 JEDEC Standard J-STD-020B.
(c) 2001, 2002, 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. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its 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 products and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as may be provided in Skyworks' Terms and Conditions of Sale for such products, Skyworks assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF SKYWORKSTM 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 SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THESE MATERIALS. SkyworksTM products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks' customers using or selling SkyworksTM 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 symbol, and "Breakthrough Simplicity"TM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Thirdparty brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is incorporated by reference.
General Information: Skyworks Solutions, Inc. 4311 Jamboree Rd. Newport Beach, CA. 92660-3007 www.skyworksinc.com

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