Digital Attenuator, 15.5 dB, 5-Bit DC-2.0 GHz Features • • • • • • AT-280 V5 Functional Schematic 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 16 15 8 dB 14 13 4 dB 12 11 2 dB 10 9 1 dB 0.5 dB 6 7 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. 1 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 Part Number Package AT-280 SOIC 16–Lead AT-280TR Forward Tape and Reel AT-280SMB Sample Test Board (Includes 5 Samples) 1. Reference Application Note M513 for reel size information. 2 3 4 5 8 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 6 VC3 14 Ground 7 VC4 15 Ground 8 VC5 16 RF1 Absolute Maximum Ratings 2 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 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. Digital Attenuator, 15.5 dB, 5-Bit DC-2.0 GHz AT-280 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 VC5 VC4 VC3 VC3 VC2 VC2 VC1 VC1 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 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. Digital Attenuator, 15.5 dB, 5-Bit DC-2.0 GHz AT-280 V5 Typical Performance Curves Insertion Loss Attenuation Accuracy 3.0 0.3 2.5 0.2 +25°C -40°C +85°C 2.0 0.5 dB Atten 1 dB Atten 2 dB Atten 4 dB Atten 8 dB Atten 15.5 dB Atten 0.1 1.5 0.0 1.0 -0.1 0.5 -0.2 0.0 0.0 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 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.