AT90-1283

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz V 4.00 AT90-1283 Features n n n n n n n CSP-1 Attenuation: 0.5 dB Steps to 15.5 dB Single Positive Supply Contains Internal DC to DC Converter Low DC Power Consumption Small Footprint, JEDEC Package Integral TTL Driver 50 ohm Impedance Description M/A-COM's AT90-1283 is a GaAs FET 5-bit digital attenuator with integral TTL driver. Step size is 0.5 dB providing a 15.5 dB total attenuation range. This device is in an FQFP-N plastic surface mount package. The AT901283 is ideally suited for use where accuracy, fast speed, very low power consumption and low costs are required. Electrical Specifications TA = +25°C Parameter Insertion Loss Attenuation Accuracy Test Conditions — Individual Bits 0.5-1-4-8 dB Individual Bit 2 dB Any Combination of Bits 1 to 15.5 dB Full Range 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% — — Two-tone inputs up to +5 dBm — Sink Current is 20 µA max. Source Current is 20 µA max. Vcc min to max, Logic “0” or “1” Frequency DC - 3.5 GHz DC - 3.5 GHz DC - 3.5 GHz DC - 3.5 GHz DC - 3.5 GHz — — 50 MHz 0.5 - 3.5 GHz 50 MHz 0.5-3.5 GHz — — — — Units dB dB dB dB Ratio nS nS dBm dBm dB dB V V V mA Min — — — — — — — — — — — 4.75 0.0 2.0 — Typical 2.8 — — — 1.6:1 75 20 +21 +29 +35 +48 5.0 — — 6 Max 3.2 ±(.3 +5% of atten setting) ±(.4 +10% of atten setting) ±(.5 +7% of atten setting) 1.8:1 150 50 — — — — 5.25 0.8 5.0 10 VSWR Switching Speed 1 dB Compression Input IP3 +Vcc Logic “0” Logic “1” Icc Di...