AT-273 Digital Attenuator, 32 dB, 2-Bit, TTL Driver, DC - 2.0 GHz Features V 7.00 CR-11 Attenuation: 16.0 dB Steps to 32 dB Low DC Power Consumption Hermetic Surface Mount Package Integral TTL Driver 50 ohm Impedance Temperature Stability: ±0.18 dB from -55°C to +85°C Typ. n Tape and Reel Packaging Available n n n n n n Description M/A-COM's AT-273 is a GaAs FET digital attenuator with a 16.0 dB minimum step size and a 32 dB total attenuation range. This attenuator and integral TTL driver is in a hermetically sealed ceramic 16-lead surface mount package. The AT-273 is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. Environmental screening is available. Contact the factory for information. Electrical Specifications: TA = 25°C Parameter Test Conditions Frequency Units Min Typ Max Insertion Loss — DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz dB dB dB — — — — — — 1.6 1.7 1.9 Attenuation Accuracy C1 Bit Full Attenuation (32 dB) Full Attenuation (32 dB) Full Attenuation (32 dB) DC - 2.0 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz ± 3% of attenuation setting in dB ± 3% of attenuation setting in dB ± 3% of attenuation setting in dB, -1 dB ± 3% of attenuation setting in dB, -3 dB VSWR Full Range DC - 2.0 GHz Ratio — — 1.6:1 Trise, Tfall 10% to 90% — ns — 7 — Ton, Toff 50% Cntl to 90% / 10% RF — ns — 28 — Transients In-Band (peak-to-peak) — mV — 30 — 1 dB Compression Input Power Input Power 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +20 +28 — — Input IP3 Two-tone inputs up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +38 +48 — — Input IP2 Two-tone inputs up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +44 +68 — — Vcc -Vee — — — — V V 4.5 -8.0 5.0 — 5.5 -5.0 Vctl Vctl Logic (0) TTL Logic (1) TTL — — V V 0.0 2.0 — — 0.8 5.0 Digital Attenuator, 32 dB, 2-Bit, TTL Driver, DC - 2.0 GHz AT-273 V 7.00 Electrical Specifications: TA = 25°C Parameter Test Conditions Frequency Units Min Typ Max Input Leakage Current (Low) Input Leakage Current (High) 0 to 0.8V 2.0 to 5.0V — — µA µA — — — — 1.0 1.0 Icc Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc –2.1V to Vcc — mA — — 2.0 -Iee Vee = -5.0 to -8.0V — mA — — -1 Absolute Maximum Ratings 1 Pin Configuration Pin No. Function Pin No. Function Parameter Absolute Maximum 1 C2 9 RF1 2 GND 10 GND Max. Input Power 0.05 GHz 0.5 - 2.0 GHz +27 dBm +34 dBm 3 C1 11 GND 4 GND 12 GND 5 GND 13 Vee 6 GND 14 Vcc +Vcc -Vee Control Voltage Operating Temperature Storage Temperature +5.5V -8.5V -0.5 to Vcc + 0.5V -55°C to +125°C -65°C to +150°C 7 GND 15 NC 8 RF2 16 NC Truth Table 1. Operation of this device above any one of these parameters may cause permanent damage. Ordering Information C1 C2 Attenuation Part Number Package 0 0 Loss, Reference AT-273 Bulk Packaging 0 1 16.0 dB AT-273TR Tape and Reel 1 1 32.0 dB 0 = TTL Low; 1 = TTL High Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 2