Voltage Variable Absorptive Attenuator, 20 dB AT-309 DC - 2 GHz V 2.00 SO-8 Features ● ● ● ● ● ● ● ● 20 dB Voltage Variable Attenuation Very Low Power Consumption: 50 µW Low Intermodulation Products Dual Voltage Control 0 to -4 Volts Nanosecond Switching Speed Temperature Range: -40˚C to +85˚C Low Cost SOIC8 Plastic Package Tape and Reel Packaging Available1 Description M/A-COM’s AT-309 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOIC 8-lead surface mount plastic package. The AT-309 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. Typical applications include radio, cellular, and GPS equipment and other Automatic Gain/Level Control circuits. The AT-309 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-309 PIN AT-309TR AT-309RTR Package SOIC 8-Lead Plastic Package Forward Tape & Reel Reverse Tape & Reel Electrical Specifications, TA = +25°C Parameter Test Conditions2 Insertion Loss DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz IP2 IP3 Min. dB dB dB dB dB dB dB dB Typ. Max 0.9 1.0 1.2 1.4 +/-0.8 +/-0.8 +/-1.0 +/-1.2 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power (Over Attenuation Range) nS nS mV dBm 0.7 0.8 0.9 1.2 +/-0.5 +/-0.5 +/-0.8 +/-1.0 1.4:1 6 8 10 5 Measured Relative (Over Attenuation Range) to Input Power (Over Attenuation Range) (for two-tone input power up to +5 dbm) Measured Relative (Over Attenuation Range) to Input Power (Over Attenuation Range) (for two-tone input power up to +5 dbm) 0.05 GHz 0.5 – 2.0 GHz dBm dBm 47 40 0.05 GHz 0.5 – 2.0 GHz dBm dBm 39 32 Flatness (Peak to Peak) VSWR (Matched) Trise, Tfall Ton, Toff Transients One dB Compression Unit 1.Refer to “Tape and Reel Packaging”Section, or contact factory. 2.All measurements at 1 GHz in a 50Ω system, unless otherwise specified.The A and B control voltages vary 0 to -4V @ 20 µA typ. Powered by ICminer.com Electronic-Library Service CopyRight 2003 Voltage Variable Absorptive Attenuator, 20 dB AT-309 V 2.00 Functional Schematic Absolute Maximum Ratings1 Parameter Absolute Maximum Max. Input Power 50 MHz 500-2000 MHz Control Voltage Operating Temperature Storage Temperature +27 dBm +30 dBm +5V, -8.5V -40°C to +85°C -65°C to +150°C 1.Operation of this device above any one of these parameters may cause permanent damage. Electrical Schematic RF 1 Q3 Q1 Q2 A B Typical Performance Powered by ICminer.com Electronic-Library Service CopyRight 2003 RF 2 Pin Configuration Pin No. Description 1 GND 2 RF1 3 GND 4 A 5 B 6 GND 7 RF2 8 GND