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| Digital Attenuator, 31 dB, 5-Bit DC - 2 GHz Features Attenuation: 1-dB Steps to 31 dB q Temperature Stability: 0.15 dB from -40C to +85C Typical q Ultra Low DC Power Consumption q Low Intermodulation Products: IP = 50 dBm 3 q Low Cost SSOP 20 Plastic Package q Tape and Reel Packaging Available q AT-260 V 2.00 SSOP-20 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. Ordering Information 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. Part No. AT-260 PIN AT-260TR AT-260RTR Package SSOP 20-Lead Forward Tape & Reel* Reverse Tape & Reel* Electrical Specifications, TA = 25C Parameter Reference Insertion Loss Test Conditions 1 * If specific reel size is requIred, consult factory for part number assignment. Attenuation Accuracy 2 VSWR Trise, Tfall Ton, Toff Transients One dB Compression IP2 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 Input Power 0.5-2.0 GHz Measured Relative 0.05 GHz to Input Power 0.5-2.0 GHz (for two-tone input power up to +5 dBm) Measured Relative 0.05 GHz to Input Power 0.5-2.0 GHz (for two-tone input power up to +5 dBm) Unit Min. Typ. Max dB 1.6 1.8 dB 1.7 1.9 dB 1.9 2.2 dB 2.2 2.5 (0.20 dB + 3% of Atten. Setting in dB) dB (0.30 dB + 3% of Atten.Setting in dB) dB 1.5:1 nS 8 nS 15 mV 2 dBm 20 dBm 27 dBm dBm dBm dBm 45 60 34 50 IP3 1. All measurements at 1 GHz in a 50 system, unless otherwise specified. 2.Attenuation accuracy specifications apply with negative bias control and low inductance grounding. V 2.00 Absolute Maximum Ratings1 Parameter Max. 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 -40C to +85C -65C to +150C Functional Schematic 1. Operation of this device above any one of these parameters may cause permanent damage. Typical Performance Pin Configuration Pin No. 1 2 3 4 5 6 7 8 9 10 Description VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4 NC VC5 Pin No. 11 12 13 14 15 16 17 18 19 20 Description RF1 GND GND GND GND GND GND GND GND RF2 Truth Table Control Inputs VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation (dB) 1 1 0 1 0 1 0 10 Reference 0 1 1 1 1 0 1 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 1 0 0 1 1 1 1 0 1 0 0 0 0 1 0 1 1 1 1 1 0 0 0 0 0 0 1 1 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 0 = V IN Low = 0 V = 0 to -0.2 V @ 20 A maximum 1 = VIN High = -5 V @ 20 A typical to -8 V @ 200 A maximum |
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