AT-260

Digital Attenuator, 31 dB, 5-Bit DC - 2.0 GHz Features • • • • • • 1-dB Attenuation Steps to 31 dB Ultra Low DC Power Consumption Low Intermodulation Products: IP3 = 50 dBm SSOP-20 Plastic Package Tape and Reel Packaging Available Temperature Stability: ± 0.15 dB from –40°C to +85°C AT-260 V5 Functional Schematic 20 19 18 17 16 15 14 13 12 11 16 dB 8 dB 4 dB 2 dB 1 dB Description M/A-COM’s AT-260 is a 5-bit, 1-dB step GaAs MMIC digital attenuator in a low cost SSOP-20 surface mount plastic package. The AT-260 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-260 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. 1 2 3 4 5 6 7 8 9 10 Pin Configuration Pin No. 1 2 3 4 Function VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4 No Connection VC5 Pin No. 11 12 13 14 15 16 17 18 19 20 Function RF1 Ground Ground Ground Ground Ground Ground Ground Ground RF2 Ordering Information Part Number AT-260 AT-260TR 5 6 Package SSOP 20-Lead Forward Tape and Reel 7 8 9 10 Note: Reference Application Note M513 for reel size information. Absolute Maximum Ratings 1,2 Parameter Input Power: 0.05 GHz 0.5 - 2.0 GHz Control Voltage Operating Temperature Storage Temperature Absolute Maximum +27 dBm +34 dBm +5V, -8.5V -40°C to +85°C -65°C to +150°C 1. Exceeding any one or combination of these limits may cause permanent damage to this device. 2. M/A-COM does not recommend sustained operation near these survivability limits. 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, 31 dB, 5-Bit DC - 2.0 GHz Electrical Specifications: TA = 25°C, Z0 = 50 Ω Parameter Reference Insertion Loss AT-260 V5 Test Conditions DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz (Any state) 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm) 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm) Units dB dB dB dB Min. — — — — Typ. 1.6 1.7 1.9 2.2 Max. 1.8 1.9 2.2 2.5 Attenuation Accuracy 3 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression ± (0.20 dB +3% of Atten Setting in dB) dB ± (0.30 dB +3% of Atten Setting in dB) dB Ratio nS nS mV dBm dBm dBm dBm — — — — — — — — 1.5:1 8 15 2 20 27 45 60 — — — — — — — — IP2 IP3 dBm dBm — — 34 50 — — 3. Attenuation accuracy specifications apply with negative bias control and low inductance grounding. Truth Table4 Control Inputs VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 1 0 1 1 1 1 0 1 1 0 1 1 1 0 0 0 1 0 0 0 1 1 1 1 0 1 1 0 0 0 0 1 0 0 1 1 1 1 1 0 1 0 0 0 0 0 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 Atten (dB) Reference 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 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. 4. 0 = Vin Low = 0 V = 0 to -0.2 V @ 20 µA maximum. 1 = Vin High = -5 V @ 20 µA typical to –8 V @ 200 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, 31 dB, 5-Bit DC - 2.0 GHz Typical Performance Curves Insertion Loss 4 AT-260 V5 Attenuation Accuracy 1.0 2 dB 4 dB 8 dB 16 dB 31 dB 3 +25°C -40°C +85°C 0.5 2 0.0 1 -0.5 0 0.0 -1.0 0.5 1.0 1.5 2.0 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR 1.6 0 1 2 4 8 16 31 1.5 1.4 1.3 1.2 1.1 1.0 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) SSOP-20 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.