AT-280 Digital Attenuator, 15.5 dB, 5-Bit DC - 2.0 GHz Functional Schematic Features • • • • • • Rev. V5 0.5 dB Attenuation Steps to 15.5 dB Ultra Low DC Power Consumption Low Intermodulation Product: +45 dBm IP3 SOIC-16 Plastic Package Tape and Reel Packaging Available Temperature Stability: +/-0.15 dB from -40°C to +85°C Description M/A-COM’s AT-280 is a 5-bit, 0.5-dB step GaAs MMIC digital attenuator in a low cost SOIC 16-lead surface mount plastic package. The AT-280 is ideally suited for use where high accuracy, fast switching, very low power consumption and low intermodulation products are required at a low cost. Typical applications include radio and cellular equipment, wireless LANS, GPS equipment and other gain/level control circuits. The AT-280 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 Pin Configuration Pin No. Function Pin No. Function 1 VC1 9 RF2 2 VC1 10 Ground 3 VC2 11 Ground 4 VC2 12 Ground 5 VC3 13 Ground Part Number Package 6 VC3 14 Ground AT-280 SOIC 16–Lead 7 VC4 15 Ground AT-280TR Forward Tape and Reel 8 VC5 16 RF1 AT-280SMB Sample Test Board (Includes 5 Samples) Absolute Maximum Ratings 2 1. Reference Application Note M513 for reel size information. Parameter Absolute Maximum Input Power: 0.05 GHz 0.5 - 2.0 GHz +27 dBm +34 dBm Control Voltage -8.5 V < VC < +5 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 2. 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-280 Digital Attenuator, 15.5 dB, 5-Bit DC - 2.0 GHz Rev. V5 Electrical Specifications: TA = 25°C, Z0 = 50 Ω Parameter Test Conditions Units Min Typ Max Reference Insertion Loss DC—0.1 GHz DC—0.5 GHz DC—1.0 GHz DC—2.0 GHz dB dB dB dB — — — — 1.1 1.3 1.5 1.8 1.3 1.5 1.8 2.0 Attenuation Accuracy 3 DC—1.0 GHz DC—2.0 GHz VSWR (Any state) Ratio 1.5:1 1.8:1 — Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 12 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 18 — Transients In Band mV — 30 — 1 dB Compression Input Power, 0.05 GHz Input Power, 0.5 - 2.0 GHz dBm dBm — — 22 27 — — 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 — — 53 68 — — 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 — — 40 45 — — ± (0.20 dB +3% of Attenuation Setting in dB) dB ± (0.30 dB +3% of Attenuation Setting in dB) dB 3. Attenuation acccuracy specifications apply with negative bias control and low inductance grounding. SOIC-16 Truth Table 4,5 Control Inputs VC 5 VC 4 VC 3 VC 3 VC 2 VC 2 VC 1 VC 1 Atten. (dB) 1 1 1 0 1 0 1 0 Reference 0 1 1 0 1 0 1 0 0.5 dB 1 0 1 0 1 0 1 0 1 dB 1 1 0 1 1 0 1 0 2 dB 1 1 1 0 0 1 1 0 4 dB 1 1 1 0 1 0 0 1 8 dB 0 0 0 1 0 1 0 1 15.5 dB 4. 0 = Vin Low = 0 V = 0 to –0.2 V @ 20 µA maximum 5. 1 = Vin High = -5 V at 20 µA to -8 V at 20 µA maximum 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-280 Digital Attenuator, 15.5 dB, 5-Bit DC - 2.0 GHz Rev. V5 Typical Performance Curves Insertion Loss Attenuation Accuracy 3.0 0.3 2.5 0.2 +25°C -40°C +85°C 2.0 0.1 1.5 0.0 1.0 -0.1 0.5 0.0 0.0 0.5 dB Atten 1 dB Atten 2 dB Atten 4 dB Atten 8 dB Atten 15.5 dB Atten -0.2 0.5 1.0 1.5 2.0 Frequency (GHz) -0.3 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) VSWR 1.5 IL 1 dB 2 dB 4 dB 8 dB 16 dB 1.4 1.3 1.2 1.1 1.0 0.0 0.5 1.0 1.5 2.0 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.