AT-635 Voltage Variable Absorptive Attenuator 35 dB, DC - 2.0 GHz Functional Schematic Features • • • • • • • Rev. V7 35 dB Voltage Variable Attenuation at 1 GHz Single Voltage Control: 0 to -4 Volts Low DC Power Consumption Nanosecond Switching Speed Temperature Range: -40°C to +85°C SOIC-14 Plastic Package Tape and Reel Packaging Available 14 13 12 11 10 9 8 1 2 3 4 5 6 7 Description M/A-COM’s AT-635 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOIC 14-lead surface mount plastic package. The AT-635 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and other automatic gain/level control circuits. The AT-635 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. Ordering Information 1,2 Pin Configuration Pin No. Function Pin No. Function 1 VC 8 RF2 2 Ground 9 Ground 3 Ground 10 Ground 4 Ground 11 Ground 5 Ground 12 Ground 6 Ground 13 Ground 7 Ground 14 RF1 Part Number Package AT-635 Bulk Packaging AT-635TR Tape and Reel Parameter Absolute Maximum AT-635SMB Sample Board Input Power +21 dBm Control Voltage -8.5 V < VC < +5 V Operating Temperature -40°C to +85°C Storing Temperature -65°C to +150°C 1. Reference Application Note M513 for reel size information. 2. All sample boards include 5 loose parts. Absolute Maximum Ratings 3,4 3. Exceeding any one or combination of these limits may cause permanent damage to this device. 4. 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-635 Voltage Variable Absorptive Attenuator 35 dB, DC - 2.0 GHz Rev. V7 Electrical Specifications: TA = 25°C, Z0 = 50 Ω Parameter Test Conditions5 Units Min. Typ. Max. Insertion Loss DC - 0.5 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz dB dB dB — — — 6.7 7.2 7.5 7.0 7.4 7.8 Flatness (Peak to Peak) 10 dB Attenuation – DC - 2.0 GHz 20 dB Attenuation – DC - 2.0 GHz 30 dB Attenuation – DC - 2.0 GHz dB dB dB — — — + 1.0 + 1.2 + 1.2 + 1.3 + 1.5 + 1.5 Ratio — 2.0:1 — VSWR Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 2 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 4 — Transients In Band mV — 30 — Power Handling Linear Operation Absolute maximum Input Power dBm dBm — — — — 13 21 IP2 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm) dBm dBm — — 34 47 — — IP3 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm) dBm dBm 18 18.5 316 366 — — 5. Control voltage: 0 to -4 volts @ 20 µA typical. 6. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply. SOIC-14† † 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-635 Voltage Variable Absorptive Attenuator 35 dB, DC - 2.0 GHz Rev. V7 Typical Performance Curves Insertion Loss vs. Frequency Attenuation vs. Control Voltage, F = 1 GHz 12 40 +25°C -40°C +85°C 10 30 8 6 20 4 10 2 0 0.0 0.5 1.0 1.5 2.0 2.5 0 -3.0 3.0 -2.5 Frequency (GHz) Attenuation vs. Frequency -1.5 -1.0 -0.5 0.0 VSWR vs. Frequency 3.5 50 Insertion Loss 5 dB Atten 10 dB Atten 35 dB Atten 3.0 40 2.5 30 2.0 20 1.5 10 0 0.0 -2.0 Control Voltage (V) 1.0 0.5 1.0 1.5 2.0 Frequency (GHz) 2.5 3.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Handling Procedures Please observe the following precautions to avoid damage: Static Sensitivity 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. 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.