AT-255

AT-255 3 Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz Features • • • • • Single Voltage Control: 0 to -3 Volts 25 dB Attenuation Range at 0.9 GHz Low DC Power Consumption SOT-25 Plastic Package Tape and Reel Packaging Available Rev. V7 Functional Schematic 3 Vc 5 GND 4 Description M/A-COM’s AT-255 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOT-25 surface mount plastic package. The AT-255 is ideally suited for use where variable 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-255 is fabricated using a mature 1-micron GaAs MESFET process. The process features full chip passivation for increased performance and reliability. 1 RF 2 GND 3 RF 3. VC = -3 V to 0 V @ 25 µA maximum. Pin Configuration Pin No. Function RF Port Ground RF Port Pin No. 4 5 Function Ground VC Ordering Information Part Number AT-255 AT-255TR AT-255SMB 1,2 1 Package Bulk Package 1000 piece reel Sample Board 2 3 Absolute Maximum Ratings 4 Parameter Input Power Control Voltage VC Operating Temperature Storage Temperature Absolute Maximum +21 dBm -8 V to +0.5 V -40°C to +85°C -65°C to +150°C 1. Reference Application Note M513 for reel size information. 2. All sample boards include 5 loose parts. 4. Exceeding any one or combination of these limits may cause permanent damage to this device. 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-255 3 Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz Electrical Specifications: TA = 25°C, Z0 = 50 Ω Parameter Insertion Loss Attenuation Flatness (Peak-to-Peak) VSWR Trise, Tfall Ton, Toff Transients 5. Insertion loss varies 0.003 dB/°C. 5 Rev. V7 Test Conditions DC—2.0 GHz DC—1.0 GHz 1.0—2.0 GHz 0.5—1.0 GHz 1.0—2.0 GHz DC—2.0 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 Ratio nS nS mV Min. — 23 18 — — — — — Typ. 3.6 25 20 +7 +5 3:1 10 20 10 Max. 4.2 — — + 10 +8 — — — — SOT-25 † † 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-255 3 Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz Typical Performance Curves Relative Attenuation vs. Control Voltage 35 30 25 20 2 15 10 5 0 -3.0 0 0.0 50 MHz 1 GHz 2.5 GHz Rev. V7 Insertion Loss vs. Frequency 4 3 +25°C -40°C +85°C 1 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Control Voltage (V) Frequency (GHz) Maximum Relative Attenuation vs. Frequency 35 Return Loss vs. Control Voltage @ 900 MHz 0 30 -5 +25°C -40°C +85°C -10 25 -15 20 -20 15 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -25 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 Frequency (GHz) Control Voltage (V) Input IP3 vs. Control Voltage 50M Hz 30 25 20 500M Hz Input P1dB vs. Control Voltage 50M Hz 35 30 25 20 500M Hz 15 15 10 5 0 -3.0 10 5 0 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 C o nt ro l Vo ltage (V) C o nt ro l V o lt a ge ( V ) 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.