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| AT-108 Voltage Variable Absorptive Attenuator 40 dB, 0.5 - 3.0 GHz Features * * * * * * Single Positive Voltage Control: 0 to +5 Volts 40 dB Attenuation Range at 900 MHz 2 dB Linearity from BSL Low DC Power Consumption SOIC-8 Plastic Package Tape and Reel Packaging Available Rev. V7 Functional Schematic 3,4,5,6 8 7 6 5 Description M/A-COM's AT-108 is a GaAs MESFET MMIC voltage variable absorptive attenuator in a low cost SOIC-8 surface mount plastic package. The AT-108 is ideally suited for use where linear attenuation, fine tuning and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and automatic gain/level control circuits. The AT-108 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. 3. Vcc = +5 VDC @ 50 A maximum. 4. Vc = 0 VDC to +5 VDC @ 50 A maximum. 5. External DC blocking capacitors are requirements on all RF ports. 6. 39 pF used for data measurements. 1 2 3 4 Ordering Information 1,2 Part Number AT-108 AT-108TR AT-108SMB Package Bulk Packaging 1000 piece reel Sample Board Pin Configuration Pin No. 1 2 3 4 Function Ground Ground RF Port VCC Pin No. 5 6 7 8 Function VC Ground RF Port Ground 1. Reference Application Note M513 for reel size information. 2. All sample boards include 5 loose parts. Absolute Maximum Ratings 7,8 Parameter Input Power Supply Voltage VCC Control Voltage VC Operating Temperature Storage Temperature Absolute Maximum +21 dBm -1 V < VCC < +8 V -1 V < VC < VCC +0.5 V -40C to +85C -65C to +150C 7. Exceeding any one or combination of these limits may cause permanent damage to this device. 8. M/A-COM does not recommend sustained operation near these survivability limits. 1 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT-108 Voltage Variable Absorptive Attenuator 40 dB, 0.5 - 3.0 GHz Electrical Specifications: TA = 25C, Z0 = 50 Parameter Insertion Loss Test Conditions 0.5 - 1.0 GHz 1.0 - 3.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 2.0 - 3.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 2.0 - 3.0 GHz 0.5 - 3.0 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In-Band Units dB dB dB dB dB dB dB dB Ratio S S mV Min. -- -- 40 35 28 -- -- -- -- -- -- -- Typ. 2.5 3.2 -- -- -- 0.5 1.2 1.5 2:1 15 25 12 Max. 2.7 3.5 -- -- -- 0.8 1.5 1.8 -- -- -- -- Rev. V7 Attenuation Flatness (peak-to-peak) VSWR Trise, Tfall Ton, Toff Transients SOIC-8 Meets JEDEC moisture sensitivity level 1 requirements. 2 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT-108 Voltage Variable Absorptive Attenuator 40 dB, 0.5 - 3.0 GHz Typical Performance Curves @ 25C Attenuation vs. Control Voltage 0 Rev. V7 Insertion Loss vs. Frequency -1.6 -10 -1.8 -2.0 -20 -2.2 -30 -2.4 -40 900 MHz 1800 MHz 2200 MHz -2.6 -50 5 4 3 2 1 0 -2.8 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Control Voltage (V) Frequency (GHz) Return Loss vs. Control Voltage, F = 900 MHz 0 -5 -10 -15 -20 -25 -30 -35 5 4 3 2 1 0 Return Loss vs. Control Voltage, F = 1800 MHz 0 -5 -10 -15 -20 -25 -30 -35 5 4 3 2 1 0 S11 (dB) S22 (dB) S11 (dB) S22 (dB) Control Voltage (V) Control Voltage (V) Return Loss vs. Control Voltage, F = 2200 MHz 0 -5 Maximum Attenuation vs. Frequency 0 -10 -10 -15 -20 -25 -40 -30 -35 5 4 3 2 1 0 -50 0.5 1.0 1.5 2.0 2.5 3.0 -20 S11 (dB) S22 (dB) -30 Control Voltage (V) Frequency (GHz) 3 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT-108 Voltage Variable Absorptive Attenuator 40 dB, 0.5 - 3.0 GHz Typical Performance Curves @ 25C 1 dB Compression vs. Control Voltage, F = 900 MHz 25 Rev. V7 IP3 vs. Control Voltage 35 30 25 400 MHz 900 MHz 20 15 20 10 15 5 10 0 5 0 -5 5 4 3 2 1 0 5 4 3 2 1 0 Control Voltage (V) Control Voltage (V) Attenuation vs. Temperature Normalized to 25C, F = 900 MHz 3 2 -40C +85C Handling Procedures Please observe the following precautions to avoid damage: 1 Static Sensitivity 0 -1 -2 5 4 3 2 1 0 Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these devices. Control Voltage (V) 4 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. |
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