Digital Attenuator, 15.5 dB, 5-Bit DC - 2 GHz AT-280 V 2.00 Features ● ● ● ● ● SO-16 Attenuation: 0.5-dB Steps to 15.5 dB Temperature Stability: ± 0.15 dB from -40°C to +85°C Typical Ultra Low DC Power Consumption Low Intermodulation Products, IP3: 45 dBm Tape and Reel Packaging Available Description M/A-COM's AT-280 is a 5-bit, 0.5 dB-step GaAs MMIC digital attenuator in a low cost SOIC 16-lead surface mount plastic package. The AT-280 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-280 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 Number SOIC 16-Lead Forward Tape & Reel* Reverse Tape & Reel* * If specific reel size is required, consult factory for part number assignment. Electrical Specifications, TA = 25°C Test Conditions2 Parameter Package AT-280 PIN AT-280TR AT-280RTR Unit Min. Typ. Max 1.1 1.3 1.5 1.8 1.3 1.5 1.8 2.0 Reference Insertion Loss DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz dB dB dB dB Attenuation Accuracy2 DC – 1.0 GHz DC – 2.0 GHz ± (0.20 dB + 3% of Atten. Setting in dB) dB ± (0.30 dB + 3% of Atten. Setting in dB) dB VSWR Trise, Tfall Ton, Toff Transients (any state) 1.5:1 nS nS mV 12 18 30 0.05 GHz 0.5 – 2.0 GHz dBm dBm 22 27 IP2 Measured Relative 0.05 GHz to Input Power 0.5 – 2.0 GHz (for two-tone input power up to +5 dBm) dBm dBm 53 68 IP3 Measured Relative 0.05 GHz to Input Power 0.5 – 2.0 GHz (for two-tone input power up to +5 dBm) dBm dBm 40 45 One dB Compression 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band 1.8:1 Input Power Input Power 1. All measurements at 1 GHz in a 50Ω system, unless otherwise specified. 2. Attenuation accuracy specifications apply with negative bias control and low inductance grounding. Digital Attenuator, 15.5 dB, 5-Bit AT-280 V 2.00 Absolute Maximum Ratings 1 Functional Schematic 1 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 – 2.0 GHz Control Voltage Operating Temperature Storage Temperature +27 dBm +34 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. Truth Table Control Inputs VC5 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation (dB) 1 1 1 0 1 0 1 0 Reference 0 1 1 0 1 0 1 0 0.5 dB 1 0 1 0 1 0 1 0 1 dB 1 1 0 1 1 0 1 0 2 dB 1 1 1 0 0 1 1 0 4 dB 1 1 1 0 1 0 0 1 8 dB 0 0 0 1 0 1 0 1 15.5 dB 0 = VinLow = 0 V = 0 to -0.2 V @ 20 A maximum Typical Performance