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| Voltage Variable Absorptive Attenuator, 35 dB 0.5 - 2 GHz AT-109 V 2.00 Features Single Positive Voltage Control 0 to +5 Volts 35 dB Attenuation Range at 0.9 GHz q 2 dB Linearity from BSL q Low DC Power Consumption q Temperature Range: -40C to +85C q Low-Cost SOIC 8 Plastic Package q Tape and Reel Packaging Available q q SO-8 Description M/A-COM's AT-109 is a GaAs MMIC voltage variable absorptive attenuator in a low-cost SOIC 8-lead surface mount plastic package. The AT-109 is more linear than the higher attenuation range AT-108. The AT-109 is ideally suited for use where linear attenuation fine tuning and very low power comsumption are required. Typical applications include radio, cellular, GPS equipment and automatic gain/level control circuits. The AT-109 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 No. AT-109 AT-109TR AT-109RTR Package SOIC 8-Lead Plastic Package Forward Tape & Reel* Reverse Tape & Reel* * Electrical Specifications1, TA = +25C Parameter Insertion Loss Attenuation Flatness (Peak-to-Peak) VSWR Trise, Tfall Ton, Toff Transients Test Conditions 1 If specific reel size is required, consult factory for part number assignment. 0.5 - 1.0 GHz 1.0 - 2.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, Control to 10% RF In-band Unit dB dB dB dB dB dB S S mV Min. Typ. 2.5 3.2 Max 2.7 3.5 35 30 0.5 1.2 2:1 25 35 12 0.8 1.5 1. All measurements at 1 GHz in a 50from ground or any other voltage. system, unless otherwise specified.The RF ports must be blocked outside of the package Voltage Variable Absorptive Attenuator, 35 dB AT-109 V 2.00 Absolute Maximum Ratings1 Parameter Maximum Input Power Supply Voltage VCC Control Voltage VCC Operating Temperature Storage Temperature Absolute Maximum +21 dBm -1 V, +8 V -1 V, VCC + 0.5 V -40C to +85C -65C to +150C Functional Schematic 1. Operation of this device above any one of these parameters may cause permanent damage. VCC = +5 VDC 0.5 VDC @ 50 A max. VC = 0 VDC to +5 VDC @ 50 A max. External DC blocking capacitors are required on all RF ports. Typical Performance ATTENUATION vs CONTROL VOLTAGE @ +25C, F = 1800 MHz 0 -5 -10 -15 -20 -25 -30 -35 5 4 3 2 1 0 1.0 2.0 INSERTION LOSS 4.0 vs FREQUENCY 3.0 0 0.5 1.0 1.5 2.0 FREQUENCY (GHz) CONTROL VOLTAGE (VOLTS) RELATIVE ATTENUATION @ +25C, F = 900 MHz 0 vs CONTROL VOLTAGE 3.5 2.5 1.5 ATTENUATION vs TEMPERATURE, NORMALIZED TO +25C, F = 900 MHz -10 -40C -20 +85C 0.5 -30 -0.5 -40 5 4 3 2 1 0 -1.5 5 4 3 2 1 0 CONTROL VOLTAGE (VOLTS) CONTROL VOLTAGE (VOLTS) Voltage Variable Absorptive Attenuator, 35 dB AT-109 V 2.00 RETURN LOSS vs CONTROL VOLTAGE @ +25C, F = 900 MHz 0 -10 -20 -30 5 -40 5 4 3 2 1 0 0 25 20 15 10 1 dB COMPRESSION vs CONTROL VOLTAGE @ +25C, F = 900 MHz 5 4 3 2 1 0 CONTROL VOLTAGE (VOLTS) CONTROL VOLTAGE (VOLTS) 35 30 25 20 IP3 vs CONTROL VOLTAGE 900 MHz 400 MHz 15 10 5 0 5 4 3 2 1 0 CONTROL VOLTAGE (VOLTS) |
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