Voltage Variable Absorptive Attenuator, 35 dB DC - 2 GHz AT-635 V 3.00 SO-14 Features ● ● ● ● ● ● ● 35 dB Voltage Variable Attenuation @ 1 GHz Single Voltage Control 0 to -4 Volts Low DC Power Consumption: 10 mW Nanosecond Switching Speed Temperature Range: -40˚C to +85˚C Low Cost SOIC14 Plastic Package Tape and Reel Packaging Available1 Description M/A-COM’s AT-635 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOIC 14-lead surface mount plastic package. The AT-635 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-635 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-635 PIN AT-635TR Package SOIC 14-Lead Plastic Package Forward Tape & Reel Electrical Specifications, TA = +25°C Test Conditions2 Parameter Insertion Loss Flatness (Peak to Peak) VSWR Trise, Tfall Ton, Toff Transients Power Handling IP2 IP3 DC-2 GHz DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz 10 dB Attenuation 20 dB Attenuation 30 dB Attenuation 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) Unit dB dB dB dB dB dB dB Min. 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 control voltage 0 to -4 volts @ 20 µA typ. 3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply. Max 6.7 7.0 7.4 7.8 +/-1.3 +/-1.5 +/-1.5 2.0:1 2 4 30 nS nS mV dBm dBm dBm dBm dBm dBm Typ. 6.5 6.7 7.2 7.5 +/-1.0 +/-1.2 +/-1.2 13 21 34 47 18 18.5 31(3) 36(3) Voltage Variable Absorptive Attenuator, 35 dB AT-635 V 2.00 Functional Schematic Absolute Maximum Ratings1 Parameter Absolute Maximum Max. Input Power +21 dBm Control Voltage +5 V, -8.5 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 1.Operation of this device above any one of these parameters ma y cause permanent damage. Pin Configuration Pin No. Description Pin No. 1 A 8 Description RF2 2 GND 9 GND GND 3 GND 10 4 GND 11 GND 5 GND 12 GND 6 GND 13 GND 7 GND 14 RF1 Typical Performance