CX65105 1700 - 2200 MHz Linear Power Amplifier Conexant's CX65105 power amplifier is a fully matched 8-pin Leadless Chip Carrier (LCC) surface mount module, developed for Personal Communication System (PCS) and Wireless Local Loop (WLL) applications. This small, powerefficient amplifier 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). This device is manufactured with Conexant's Aluminum (Al)GaAs Heterojunction Bipolar Transistor (HBT) process, which allows for single supply operation while maintaining high efficiency and good linearity. * * * * * Typical POUT of 27 dBm High linearity Low power consumption 8-pin LCC package Single +5 V supply Applications * PCS/DCS/UMTS * Repeaters * WLL, and Industrial, Scientific, Medical (ISM) bands * Mobile radio * Telematics 8 4 DRIVER STAGE BIAS RFIN 2 INPUT MATCH POWER STAGE BIAS INTERSTAGE MATCH DA OUTPUT MATCH DA 6 GND 1 7 GND RFIN 2 6 RFOUT VREF 3 5 GND RFOUT 4 3 8 VCC2 VCC1 VREF VCC1 Figure 1 shows a functional block diagram for the CX65105. The device package and pinout are shown in Figure 2. Distinguishing Features MMIC 5, 7 GND GND Figure 2. CX65105 Pinout - 8-Pin LCC Package Top View Figure 1. CX65105 Functional Block Diagram Data Sheet VCC2 MODULE 1 Conexant Proprietary Information and Specifications Are Subject to Change Doc. No. 101476D April 1, 2002 CX65105 Power Amplifier Electrical and Mechanical Specifications Typical performance characteristics over temperature of the CX65105 are illustrated in Figures 3, 4, 5, 6, 7, and 8. The signal pin assignments and functions are described in Table 1. 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. Table1. CX65105 Signal Descriptions Pin # Name Description 1 GND Ground 2 RFIN RF input 3 VREF Reference voltage 4 VCC2 Supply voltage 5 GND Ground 6 RFOUT 7 GND Ground 8 VCC1 Supply voltage RF output Table 2. CX65105 Absolute Maximum Ratings Parameter Symbol Min Typical Max Units RF input power PIN 7 dBm Supply voltage VCC 8.5 V Reference voltage VREF 4 Case operating temperature TC -30 110 C Storage temperature TST -55 125 C Note: No damage to device if only one parameter is applied at a time with other parameters at nominal conditions. Table 3. CX65105 Recommended Operating Conditions Parameter 2 Symbol Min Typical Max Units Supply voltage VCC 5 V Reference voltage VREF 3.6 V Operating frequency FO 1700 1900 2200 MHz Case operating temperature TC -30 25 85 C Conexant Proprietary Information and Specifications Are Subject to Change 101476D April 1, 2002 Power Amplifier CX65105 Table 4. CX65105 Electrical Characteristics (VCC = 5 V, VREF = 3.6 V, Frequency = 1900 MHz, TC = 25 C) Parameter Symbol Test Conditions Min Typical Max Units 1700 1900 2200 MHz 143 185 mA Analog Inputs Frequency range Quiescent current Iq Small signal gain G PIN = -15 dBm 22.5 24.0 dB Output power POUT PIN = 4 dBm 26 27 dBm Efficiency PAE PIN = 4 dBm 20 25 Noise Figure (NF) NF Output IP3 OIP3 % 6 Two tones with 100 kHz spacing PIN = 0 dBm per tone 36 7 40 dB dBm Note: The above specifications apply only to the 1900 MHz operating frequency. 31 Pout (dBm) 30 29 28 -30C 25C 27 85C 26 25 24 2 3 4 5 6 7 Pin (dBm) Figure 3. Typical POUT vs PIN Over Temperature 101476D April 1, 2002 Conexant Proprietary Information and Specifications Are Subject to Change 3 Power Amplifier PAE (%) CX65105 36 34 32 30 28 26 24 22 20 18 16 85C 25C -30C 2 3 4 5 6 7 Pin (dBm) Figure 4. Typical PAE vs PIN Over Temperature Small Signal Gain (dB) 30 25 20 85C 15 25C -30C 10 5 0 1700 1800 1900 2000 2100 2200 Freq (MHz) Figure 5. Typical Small Signal Gain vs Frequency Over Temperature 8 7 NF (dB) 6 5 85C 4 25C -30C 3 2 1 0 1700 1800 1900 2000 2100 2200 Freq (MHz) Figure 6. Typical Noise Figure vs Frequency Over Temperature 4 Conexant Proprietary Information and Specifications Are Subject to Change 101476D April 1, 2002 Power Amplifier CX65105 50 OIP3 (dBm) 40 30 85C 25C -30C 20 10 0 1700 1800 1900 2000 2100 2200 Freq (MHz) Figure 7. Typical OIP3 vs Frequency Over Temperature 35 Pout (dBm) 30 25 20 -30C 25C 15 85C 10 5 0 1700 1800 1900 2000 2100 2200 Freq (MHz) Figure 8. Typical POUT vs Frequency Over Temperature Evaluation Board Description 1. Paths to ground should be made as short as possible. Conexant's CX65105 Evaluation Board is used to test the CX65105 power amplifier's performance. The CX65105 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. 2. The ground pad of the CX65105 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. 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 Circuit Design Considerations ________________________ The following design considerations are general in nature and must be followed regardless of final use or configuration: 101476D April 1, 2002 Conexant Proprietary Information and Specifications Are Subject to Change 5 CX65105 Power Amplifier Package Dimensions 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: 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 4 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. 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 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. For additional details on both attachment techniques, precautions, and recommended handling procedures, refer to the Conexant document Solder Reflow Application Note, document number 101536. Production quantities of this product are shipped in a standard tape and reel format. For packaging details, refer to the Conexant document Tape and Reel Information Application Note, document number 101568. Electro-Static Discharge (ESD) Sensitivity Caution: If the input signal exceeds the rated power, the CX65105 Evaluation Board can be permanently damaged. 6 Figure 13 shows the package dimensions for the 8-pin CX65105 LCC and Figure 14 provides the tape and reel dimensions. The CX65105 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions. Conexant Proprietary Information and Specifications Are Subject to Change 101476D April 1, 2002 Power Amplifier CX65105 +5 V C1 0.01 F C2 4.7 F VCC1 8 T2 50 microstrip T1 1 7 2 6 3 5 RF in C5 4.7 pF RFIN VREF T3 50 microstrip RF out RFOUT 4 C6 0.01 F Pin 9 Package Base VCC2 C3 0.01 F +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 8x8 PA EVALUATION BD. TW10 D845 REV A 07-02-01 C1 C2 CX65105 C5 C6 C3 J2 (RF Out) GND GND VCC2 GND C4 VREF VCC1 J1 (RF In) J3 C1257b Figure 10. Evaluation Board Assembly Diagram (Top View) 101476D April 1, 2002 Conexant Proprietary Information and Specifications Are Subject to Change 7 CX65105 Power Amplifier Layer 1: Top - Metal Layer 2: Inner Traces Layer 3: Solid Ground Plane C1253d Figure 11. Evaluation Board Layer Detail 8 Conexant Proprietary Information and Specifications Are Subject to Change 101476D April 1, 2002 Power Amplifier CX65105 Power Supply Input Signal Generator Power Meter or Spectrum Analyzer Output CX65105 Evaluation Board C1240d Figure 12. CX65105 Evaluation Board Testing Configuration 1.955 0.155 1.45 0.10 Pin 8 Pin 7 Pin 1 8.385 0.125 7.875 0.075 Pin 2 Pin 6 Pin 5 Pin 3 Pin 4 0.51 0.05 8.385 0.125 7.875 0.075 3.30 (2X) DETAIL A 1.65 (2X) Note: pin 1 connects to ground 0.81 (12X) 3.30 (2X) R.20 (8X) 3.99 R 2.54 3.94 Pin 9 1.91 (2X) 1.91 (2X) 0.61 (12X) SEE DETAIL A 3.94 1.65 (2X) 3.99 COPPER BOTTOM SOLDER MASK BOTTOM The bottom solder mask thickness = 0.063 maximum All dimensions are in millimeters C1201 Figure 13. CX65105 8-Pin LCC Package Dimension Drawing 101476D April 1, 2002 Conexant Proprietary Information and Specifications Are Subject to Change 9 CX65105 Power Amplifier 12.00 0.10 1.50 0.10 4.00 0.10 2.00 0.10 1.75 0.10 B Pin #1 A A 7.50 0.10 16.00 +0.30/-0.10 B 1.50 0.25 8 Max 5 Max 0.318 0.013 8.89 0.10 8.88 0.10 A B 2.14 0.10 Notes: 1. Carrier tape: black conductive polycarbonate. 2. Cover tape material: transparent conductive PSA. 3. All dimensions are in millimeters. C1221 Figure 14. CX65105 8-Pin LCC Tape and Reel Dimensions 10 Conexant Proprietary Information and Specifications Are Subject to Change 101476D April 1, 2002 Power Amplifier CX65105 Ordering Information Model Name Ordering Part Number Evaluation Kit Part Number CX65105 1700-2200 MHz Linear Power Amplifier CX65105-11 TW10-D842 (c) 2001, 2002, Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. ("Conexant") products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Conexant's Terms and Conditions of Sale for such products, Conexant 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 CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. CONEXANT FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS. 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For technical questions, contact your local Conexant sales office or field applications engineer. 101476D April 1, 2002 Conexant Proprietary Information and Specifications Are Subject to Change 11 www.conexant.com General Information: U.S. and Canada: (800) 854-8099 International: (949) 483-6996 Headquarters - Newport Beach 4311 Jamboree Rd. Newport Beach, CA 92660-3007