Digital Attenuator, 31 dB, 5-Bit DC – 2 GHz AT-260 V 2.00 Features SSOP-20 Attenuation: 1-dB Steps to 31 dB ● Temperature Stability: ± 0.15 dB from -40°C to +85°C Typical ● Ultra Low DC Power Consumption ● Low Intermodulation Products: IP = 50 dBm 3 ● Low Cost SSOP 20 Plastic Package ● Tape and Reel Packaging Available ● Description M/A-COM's AT-260 is a 5-bit, 1-dB step GaAs MMIC digital attenuator in a low cost SSOP-20 surface mount plastic package. The AT-260 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-260 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. Electrical Specifications, TA = 25°C * Package SSOP 20-Lead Forward Tape & Reel * Reverse Tape & Ree l* If specific reel size is requIred, consult factory for part number assignment. Test Conditions 1 Parameter Reference Insertion Loss Attenuation Accuracy 2 VSWR Trise, Tfall Ton, Toff Transients One dB Compression Part No. AT-260 PIN AT-260TR AT-260RTR DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz DC – 1.0 GHz DC – 2.0 GHz (any state) 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.05 GHz Input Power 0.5-2.0 GHz Unit Min. Typ. Max dB 1.6 1.8 dB 1.7 1.9 dB 1.9 2.2 dB 2.2 2.5 ± (0.20 dB + 3% of Atten. Setting in dB) dB ± (0.30 dB + 3% of Atten.Setting in dB) dB 1.5:1 nS 8 nS 15 mV 2 dBm 20 dBm 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 45 60 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 34 50 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. V 2.00 Absolute Maximum Ratings1 Parameter Max. Input Power 0.05 GHz 0.5–2.0 GHz Control Voltage Operating Temperature Storage Temperature Functional Schematic Absolute Maximum +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. Typical Performance Pin Configuration Pin No. 1 2 3 Description VC1 VC1 VC2 Pin No. 11 12 13 Description RF1 GND GND 4 5 6 7 VC2 VC3 VC3 VC4 14 15 16 17 GND GND GND GND 8 9 VC4 NC 18 19 GND GND 10 VC5 20 RF2 Truth Table Control Inputs VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation (dB) 1 1 0 1 0 1 0 1 0 Reference 0 1 0 1 0 1 0 1 0 1 dB 1 0 1 1 0 1 0 1 0 2 dB 1 1 0 0 1 1 0 1 0 4 dB 1 1 0 1 0 0 1 1 0 8 dB 1 1 0 1 0 1 0 0 1 16 dB 0 0 1 0 1 0 1 0 1 31 dB 0 = V IN Low = 0 V = 0 to -0.2 V @ 20 µA maximum 1 = VIN High = -5 V @ 20 µA typical to -8 V @ 200 µA maximum