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| 2.3 to 2.5 GHz 1 Watt Power Amplifier August 2007 - Rev 05-Aug-07 CMM2321-AK Features 48% Power Added Efficiency 31.5 dBm Output Power Low Distortion Low Cost SO-8 Surface Mount Package Functional Block Diagram V g2 4 Vg1 3 GND 2 RF IN 1 5 RF OUT/Vd2 6 RF OUT/Vd2 7 Vd1 8 N/C Back plane is ground and must be soldered to thermally conductive ground plane. General Description The CMM2321 is a power amplifier intended for use in 2.4 GHz ISM band applications such as wireless datacom equipment, wireless bar code scanners and inter-building campus networks. This flexible amplifier can be biased to support the requirements of frequency hopping or direct sequence systems. The CMM2321 is packaged in a low-cost, space efficient SO-8 power package that gives excellent electrical stability and thermal handling performance with a R of less than 18 C/W. The part is designed to require minimal external circuitry for bias matching, simplifying design and keeping board space and cost to a minimum. Applications Wireless Datacom Wireless Bar Code Scanners Inter-Building Campus Networks Absolute Maximum Ratings Parameter Rating Parameter Rating Parameter Rating Drain Voltage (+Vd) Drain Current (Id) RF Input Power DC Gate Voltage (-Vg) +9.0 V* 1.8 A +15 dBm* -4.0 V* Power Dissipation Thermal Resistance Storage Temperature 5W 18C/W -65C to +150C Operating Temperature Channel Temperature Soldering Temperature -40C to +100C 175C 260C for 5 Sec. * Max (+Vd) and (-Vg) under linear operation. Max potential difference across the device in RF compression (2Vd+ |-Vg|) not to exceed the minimum breakdown voltage (Vbr) of +18V. Recommended Operating Conditions Parameter Typ Units Parameter Typ Units Drain Voltage (+Vd) 4.5 to 5.1 Volts Operating Temperature (PC Board) -30 to +80 C Electrical Characteristics Parameter The following specifications are guaranteed at room temperature with drain voltage (+Vd) = 4.8 V @ 2.45 GHz in Celeritek test fixture. Condition Min Typ Max Units Frequency Range P-1dB POUT Saturated Efficiency (PAE) Gain Harmonics Noise Figure Return Loss Negative Supply Current (-Ig) Positive Supply Current (Id) P IN = +14 dBm @ Saturation 2nd @ Pout = +30 dBm 3rd @ Pout = +30 dBm 2.3 30 31 18 2.5 30.5 31.5 48 20 -35 -40 5.0 10 0.5 675 -30 -35 1.0 @ P-1dB GHz dBm dBm % dB dBc dBc dB dB mA mA Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 1 of 4 Characteristic Data and Specifications are subject to change without notice. (c)2007 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 2.3 to 2.5 GHz 1 Watt Power Amplifier August 2007 - Rev 05-Aug-07 CMM2321-AK Typical Performance Gain vs Frequency 22 4.8 V 36 Saturated Power Output vs Frequency (P IN = +14 dBm) 4.8 V 4.5 V Power Out, dBm 21 31 3.6 V 26 21 16 2.40 Gain, dB 4.5 V 20 3.6 V 19 18 2.40 2.45 Frequency, GHz 2.50 2.45 Frequency, GHz 2.50 Power Output vs Power Input @ 2.45 GHz 36 Efficiency vs Power Input @ 2.45 GHz Power Out, dBm 31 75 Efficiency, % 26 4.8 V 21 16 -2 2 6 10 Power Input, dBm 14 50 25 0 0 2 6 10 Power Input, dBm 14 4.8 V Application Information The CMM2321 is a two stage amplifier that requires a positive and negative supply voltage for proper operation. It is essential when turning on the device that the negative supply be applied before the positive supply. When turning the device off, the positive supply should be removed before the negative supply is removed. The CMM2321 can be operated over a range of supply voltages and bias points. It is important that the maximum power dissipation of the package be observed at all times. Their placement and value provide tuning. Vd2 is fed through a /4 trace. All other capacitors shown in the schematic are used for decoupling. Note: Circuit board 8251 is a multiple-use test board. The portions of the board that are used with the CMM2321 are shown as solid traces on the board layout drawing on Page 3. The interface/conversion points in the evaluation board schematic are shown. These connection points may not be labeled identically on Mimix's PB-CMM2321 evaluation board. Contact the factory for assistance in translating the external match to a specific application. Supply Ramping To obtain the necessary power ramp, supply side switching should be used. Both drain voltages should be tied together and ramped to produce the required power vs. time response. Thermal 1. The copper pad on the backside of the CMM2321 must be soldered to the ground plane. 2. All 8 leads of the package must be soldered to the appropriate electrical connection. 3. A large ground plane area with plated thru-holes as shown on the PCB layout should be used as a backside connection. Contact the factory for a copy of a manufacturing application note containing more detailed information. Page 2 of 4 Design Considerations Biasing A negative voltage supply is needed to bias the gates of the 2-stage GaAs FET power amplifier. Gate 1 bias is applied through pin 3 (Vg1) and gate 2 bias is applied through pin 4 (Vg2). Under most operating conditions gates 1 and 2 may be tied together. The positive supply voltage is applied to pins 5 and 6 (Vd2) and pin 7 (Vd1). The negative voltage supply should be adjusted to achieve a drain current of 600 mA with no RF input power to obtain a P1dB of approximately 30.5 dBm. Matching Circuits Input and output matching circuits are required. The schematic and the PCB layout for the test board are shown on Page 3. The matching circuits for the CMM2321 are highlighted on the PCB layout. A single shunt capacitor is used to match the output. Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. (c)2007 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 2.3 to 2.5 GHz 1 Watt Power Amplifier August 2007 - Rev 05-Aug-07 CMM2321-AK Test Circuits Evaluation Board Schematic Board substrate: ER = 4.60 Thickness = 0.031 in. Transmission line electrical lengths at 2.45 GHz. (Dimensions in inches) Line T1 T2 T3 T4 T5 Z (O) 104 104 50 53 91 E ( ) 14 19 11 31 82 -V gg C13 .01 F C6 100 pF RF OUT (50 ) C11 0.01 F C8 100 pF C12 0.01 F T4 C4 2.2 pF T3 C5 0.5 pF RF IN (50 ) C1 3.9 pF T1 C2 0.5 pF T2 4 3 2 1 5 6 7 8 T5 C10 100 pF C14 .01 F C15 2.2 F C7 100 pF Vdd C9 100 pF NC C3 1.8 pF CMM2321-AK R1 51K PB-CMM2321 Evaluation Board Ground -Vgg (Vg1, Vg2) RF OUT RF IN Vdd (Vd1, Vd2) Ground Evaluation Board Parts List Part Type Reference Designator Description Manufacturer Part Number Resistor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor R1 C1 C2, C5 C3 C4 C6, C7, C8, C9, C10 C11, C12, C13, C14 C15 51 K 0603 3.9 pF 0805 NPO 0.5 pF 0805 NPO 1.8 pF 0805 NPO 2.2 pF 0805 NPO 100 pF 0603 NPO 0.01 F 0805 X7R 2.2 F Tantalum Rohm Rohm Rohm Rohm Rohm Rohm Rohm Matsuo MCR 03J 513 MCH 185 A3R9CK MCH 185 A0R5CK MCH 185 A1R8CK MCH 185 A2R2CK MCH 185 A101JK MCH 215 C103KK 267 M2002225M Page 3 of 4 Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. (c)2007 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 2.3 to 2.5 GHz 1 Watt Power Amplifier August 2007 - Rev 05-Aug-07 CMM2321-AK Connection Diagram and Pin Descriptions Pin # 1 2 3 4 5 6 7 8 Name RF IN GND Vg1 Vg2 RF OUT/Vd2 RF OUT/Vd2 Vd1 N/C Description RF input (internally DC blocked) Ground Input stage gate bias Output stage gate bias RF output and Vd2. External matching circuit required RF output and Vd2. External matching circuit required Input stage drain bias Ground this pin Vg2 Vg1 GND MATCH 4 3 2 1 5 6 7 8 N/C MATCH Vd2 RF OUT Vd1 RF IN Physical Dimensions Ordering Information Part Number for Ordering CMM2321-AK CMM2321-AK-000T PB-CMM2321-AK The CMM2321 is available in a surface mount SO-8 power package and devices are available in tape and reel. Package SO-8 surface mount power package SO-8 surface mount power package in tape and reel Evaluation Board with SMA connectors Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 4 of 4 Characteristic Data and Specifications are subject to change without notice. (c)2007 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. |
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