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| Voltage Variable Absorptive Attenuator DC - 2 GHz Features q q q q q q q q AT-259 V 2.00 SOT-143 Attenuation: 12 dB at 1 GHz Low Intermodulation Products Low DC Power Consumption: 50 W Single Voltage Control 0 to -4 Volts Nanosecond Switching Speed Temperature Range: -40C to + 85C Low Cost SOT/143 Plastic Package Tape and Reel Packaging Available1 Description M/A-COM's AT-259 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOT/143 4-Lead surface mount plastic package. The AT-259 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and other Automatic Gain/Level Control circuits. The AT-259 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 Part Number AT-259 PIN AT-259TR AT-259RTR Unit dB dB dB dB dB dB dB nS nS mV dBm dBm dBm dBm dBm 18 18.5 Package SOT 4-Lead Plastic Package Forward Tape & Reel Reverse Tape & Reel Min. Typ. 2.9 3.0 3.2 3.4 0.2 2.3 7.0 2.1:1 3 5 10 Max 3.1 3.2 3.5 3.8 0.4 2.5 7.5 Electrical Specifications, TA = +25C Parameter Insertion Loss Test Conditions2 DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz 5 dB Attenuation 10 dB Attenuation 15 dB Attenuation Flatness (Peak to Peak) VSWR Trise, Tfall Ton, Toff Transients Power Handling IP2 DC - 2.0 GHz IP3 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Linear Operation Absolute Max.Input Power 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) 13 21 34 47 31(3) 36(3) 1. Refer to "Tape and Reel Packaging"Section, or contact factory. 2. All measurements at 1 GHz in a 50 system, unless otherwise specified.A control voltage 0 to -4 volts @ 20 A typ. 3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply. Voltage Variable Absorptive Attenuator AT-259 V 2.00 Absolute Maximum Ratings1 Parameter Max. Input Power Control Voltage Operating Temperature Storage Temperature Absolute Maximum +21 dBm +5 V, -8.5 V -40C to +85C -65C to +150C Functional Schematic 4 3 1.Operation of this device above any one of these parameters may cause permanent damage Pin Configuration Pin No. 1 2 3 4 Description GND A RF2 RF1 1 2 Typical Performance |
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