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DATA SHEET
CX77107: PA Module for CDMA / PCS (1850-1910 MHz)
Applications
* Personal Communications Services (PCS) * Wireless local loop (WLL) The CX77107 Power Amplifier Module (PAM) is a fully matched 10-pin surface mount module developed for Personal Communications Service (PCS) and Wireless Local Loop (WLL) applications. This small and efficient Power Amplifier packs full 1850-1910 MHz bandwidth coverage into a single compact package. The CX77107 meets the stringent spectral linearity requirements of Code Division Multiple Access (CDMA) PCS transmission, with high power added efficiency for power output of up to 28 dBm. A low current (VCONT) pin is provided to improve efficiency for the low RF power range of operation. 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 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 CX77107 is supplied directly from a three-cell Ni-Cd, a single-cell Li-Ion, or other suitable battery with an output in the 3 to 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.
Features
* Low voltage positive supply - 3.2 V to 4.2 V * Good linearity * High efficiency * Large dynamic range * 10-pin package - 4 mm x 4 mm x 1.5 mm * Power down control * Low power-state control * InGaP * IS95/CDMA2000 * Full U.S. PCS coverage
Figure 1. Functional Block Diagram
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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
Electrical Specifications
The following tables list the electrical characteristics of the CX77107 Power Amplifier. Table 1 lists the absolute maximum ratings, while Table 2 shows the recommended operating conditions to achieve the performance characteristics listed in Table 4. Table 3 presents a truth table for the power ranges.
Table 1. Absolute Maximum Ratings (1)
Parameter RF Input Power Supply Voltage Reference Voltage Case Operating Temperature Storage Temperature PIN VCC VREF TC TSTG Symbol Minimum -- -- -- -30 -55 Nominal 0.0 3.4 3.0 25 -- Maximum 7.0 6.0 3.1 +110 +125 Unit dBm Volts Volts C C
(1) No damage assuming only one parameter is set at limit at a time with all other parameters set at nominal value.
Table 2. Recommended Operating Conditions
Parameter Supply Voltage Reference Voltage Control voltage Operating Frequency Case Operating Temperature Low Mode High Mode Symbol VCC VREF VCONT VCONT FO TC Minimum 3.2 2.95 2.5 0.0 1850.0 -30 Nominal 3.4 3.0 -- -- 1880.0 +25 Maximum 4.2 3.05 3.0 0.5 1910.0 +85 Unit Volts Volts Volts Volts MHz C
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 V-0.5 V 2.5 V-3.0 V 0.0 V Range 16 dBm-28 dBm 16 dBm --
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Table 4. Electrical Specifications for CDMA Nominal Operating Conditions (1)
Characteristics Symbol GLOW Gain conditions Digital Mode GHIGH PAELOW Power Added Efficiency Digital Mode PAEHIGH Total Supply current ICC_LOW ICC_HIGH Quiescent current Reference Current Control Current Total Supply current in Power-down Mode IQ_LOW IQ_HIGH IREF ICTRL IPD ACP1LOW 1.25 MHz offset ACP1HIGH Adjacent Channel Power (2) (3) ACP3LOW 2.25 MHz offset ACP3HIGH Harmonic Suppression Second Third Noise Power in RX Band 1930-1990 MHz Noise Figure Input Voltage Standing Wave Ratio (VSWR) Stability (Spurious output) Ruggedness - No damage (4) FO2 FO3 RxBN NF VSWR S Ru Condition VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm PO = 16 dBm PO = 28 dBm VCONT 2.5 V VCONT 0.5 V -- VCONT = 2.5 V VCC = 3.4V VREF = 0 V VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm PO 28 dBm PO 28 dBm PO 28 dBm -- -- 5:1 VSWR All phases PO 28 dBm Min. 22.0 26.5 7.5 37.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 10:1 Typical 24.0 28.0 9.0 39.0 125 475 50 90 6.0 140 3.0 -48.0 -50.0 -73.0 -58.5 -40.0 -55.0 -138.0 4.0 -- -- -- Max. 26.5 dB 30.0 -- % -- 150 500 -- -- -- -- 5.0 -45.0 -48.0 dBc -58.0 -56.5 -35.0 -40.0 -137.0 5.0 2.0:1 -70.0 -- dBm/Hz dB -- dBc VSWR dBc mA A A mA mA Unit
(1) VCC = +3.4 V, VREF = +3.0 V, Freq = 1880 MHz, TC = 25 C, unless otherwise specified (2) 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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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
Table 5. Electrical Specifications for CDMA Recommended Operating Conditions (1)
Characteristics Symbol GLOW Gain conditions Digital Mode GHIGH ACP1LOW 1.25 MHz offset ACP1HIGH Adjacent Channel Power (2) (3) (4) ACP3LOW 2.25 MHz offset ACP3HIGH Harmonic Suppression Noise Power in RX Band 1840-1895 MHz Noise Figure Input Voltage Standing Wave Ratio (VSWR) Stability (Spurious output) Ruggedness - No damage (5)
(1) Per Table 2, unless otherwise specified. (2) 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) Worst case ACPR is -43dBc at +85 C, VCC = 3.2 V. (5) All phases, time = 10 seconds.
Condition VCONT 2.5 V PO = 16 dBm VCONT 0.5 V PO = 28 dBm VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm VCONT 2.5 V PO 16 dBm VCONT 0.5 V PO 28 dBm PO 28 dBm PO 28 dBm PO 28 dBm -- -- 5:1 VSWR All phases PO 28 dBm
Minimum 21.0 24.5 -- -- -- -- -- -- -- -- -- -- 10:1
Maximum 29.5
Unit
dB 33.0 -44 -44 dBc -56 -56 -30 -40 -136.0 7.0 2.5:1 -70.0 -- dBm/Hz dB -- dBc VSWR dBc
Second Third
FO2 FO3 RxBN NF VSWR S Ru
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Characterization Data
The graphs from Figure 2 through Figure 10 illustrate the characteristics of a typical CX77107 power amplifier designed for operation in the PCS frequency band (1850-1910 MHz). This amplifier was selected by characterizing a group of devices and choosing a part with average electrical performance for both nominal and the full range of recommended operating conditions, including worst case limits. The graphs illustrate the digital signal characteristics of the CX77107. 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 2. Digital Mode Gain vs. Output Power
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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
Figure 3. Primary Bias Current vs. Output Power
Figure 4. Power Added Efficiency vs. Output Power
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Figure 5. ACP for 1.25 MHz Offset vs. Output Power
Figure 6. ACP for 2.25 MHz Offset vs. Output Power
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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
Figure 7. Second Harmonic Rejection vs. Output Power
Figure 8. Third Harmonic Rejection vs. Output Power
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Figure 9. Noise Figure as Function of Operating Conditions
Figure 10. Input VSWR as Function of Operating Conditions
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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
Evaluation Board Description
The evaluation board is a platform for testing and interfacing design circuitry. To accommodate the interface testing of the CX77107, the evaluation board schematic and diagrams are included for preliminary analysis and design. Figure 11 is the basic schematic of the board for the 1850 MHz to 1910 MHz range and Figure 12 is a diagram of the board assembly.
Figure 11. Evaluation Board Schematic
Figure 12. Evaluation Board Assembly Diagram
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Package Dimensions and Pin Descriptions
The CX77107 is a multi-layer laminate base, overmold encapsulated modular package designed for surface mount solder attachment to a printed circuit board. Figure 13 is a mechanical drawing of the pad layout for this package and Figure 14 illustrates typical case markings. The pin numbering convention, as shown in Figure 15, starts with pin 1 in the upper left and increments counter-clockwise around the package. Table 6 lists each pin function and description.
Figure 13. CX77107 Package Drawing
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DATA SHEET * CX77107
PA MODULE FOR CDMA / PCS (1850-1910 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 CX77107 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 Skyworks 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 Skyworks Application Note: Tape and Reel Information-RF Modules, Document Number 101568.
Figure 14 Typical Case Markings (Top View)
Electrostatic Discharge Sensitivity
Figure 15. Pin Configuration (Top View) Table 6. Pin Names and Descriptions
PIN Number 1 2 3 4 5 6 7 8 9 10 GND PAD
(1)
Function VCC1 RF IN GND VCONT VREF GND GND RF OUT GND VCC2 GND
(1) (1)
Description Connect to battery or DC supply RF Input Ground Control voltage Reference voltage Ground Ground RF Output Ground Connect to battery or DC supply Ground pad on underside of package
The CX77107 is a Class I device. lists the Electrostatic Discharge (ESD) immunity level for each pin of the CX77107 product. The numbers in specify the ESD threshold level for each non-ground pin where the I-V curve between the pin and ground starts to show degradation. The ESD testing was performed in compliance with MIL-STD883E Method 3015.7 using the Human Body Model. If ESD damage threshold magnitude is found to consistently exceed 2000 volts on a given pin, this so is indicated. If ESD damage threshold below 2000 volts is measured for either polarity, numbers are indicated that represent worst case values observed in product characterization. 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 nonfunctional". 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.
All supply pins may be connected together at the supply.
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PA MODULE FOR CDMA / PCS (1850-1910 MHZ)
DATA SHEET * CX77107
Table 7. Practices to Avoid Induced Damage -GaAs IC Products
Personnel Grounding Wrist Straps Conductive Smocks, Gloves and Finger Cots Antistatic ID Badges Relative Humidity Control and Air Ionizers Dissipative Floors (less than 109 to GND) Dissipative Table Tops Protective Test Equipment (Properly Grounded) Grounded Tip Soldering Irons Conductive Solder Suckers Static Sensors Bags and Pouches (Faraday Shield) Protective Tote Boxes (Conductive Static Shielding) Protective TraysGrounded Carts Protective Work Order Holders
Facility
Protective Workstation
Protective Packaging and Transportation
Figure 16. ESD Sensitivity Areas (Top View)
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Ordering Information
Model Number CX77107 Manufacturing Part Number CX77107-14P Product Revision -14P Package 4x4LM-10 Operating Temperature -30 C to +85 C
Revision History
Revision A B C D Level July 3, 2003 April 29, 2004 September 27, 2004 December 8, 2004 Date Initial Release Revise: Table 4 Add: Product Revision Revise: Figure 11 Description
References
Application Note: PCB Design and SMT Assembly/Rework, Document Number 101752. Application Note: Tape and Reel Information-RF Modules, Document Number 101568 Standard SMT Reflow Profiles: JEDEC Standard J-STD-020
(c) 2001-2003, 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. Third-party brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is incorporated by reference.

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