Datasheet AD96685, AD96687 (Analog Devices)

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Ultrafast Comparators AD96685/AD96687 FEATURES AD96685 FUNCTIONAL BLOCK DIAGRAM Fast: 2.5 ns Propagation Delay NONINVERTING Low Power: 118 mW per Comparator Q INPUT OUTPUT Packages: DIP, SOIC, PLCC INVERTING INPUT Q OUTPUT Power Supplies: +5 V, –5.2 V R R L L Logic Compatibility: ECL 50 ps Delay Dispersion LATCH VT ENABLE APPLICATIONS High Speed Triggers High Speed Line Receivers AD96687 FUNCTIONAL BLOCK DIAGRAM Threshold Detectors NONINVERTING NONINVERTING Window Comparators INPUT Q OUTPUT Q OUTPUT INPUT Peak Detectors Q OUTPUT Q OUTPUT INVERTING INVERTING INPUT R R L L RL RL INPUT LE LE LE LE VT LATCH LATCH ENABLE ENABLE THE OUTPUTS ARE OPEN EMITTERS, REQUIRING EXTERNAL PULL-DOWN RESISTORS. THESE RESISTORS MAY BE IN THE RANGE OF 50
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-200
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CONNECTED TO –2.0V, OR 200
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-2000
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GENERAL DESCRIPTION
The AD96685 and AD96687 are ultrafast voltage comparators. The AD96685 is a single comparator with 2.5 ns propagation delay; the AD96687 is an equally fast dual comparator. Both devices feature 50 ps propagation delay dispersion which is a particularly important characteristic of high-speed comparators. It is a measure of the difference in propagation delay under differing overdrive conditions. A fast, high precision differential input stage permits consistent propagation delay with a wide variety of signals in the common- mode range from –2.5 V to +5 V. Outputs are complementary digital signals fully compatible with ECL 10 K and 10 KH logic families. The outputs provide sufficient drive current to directly drive transmission lines terminated in 50 Ω to –2 V. A level sensitive latch input which permits tracking, track-hold, or sample-hold modes of operation is included. The AD96685 is available in industrial –25°C to +85°C range in 16-pin SOIC. The AD96687 is available in industrial range –25°C to +85°C, in 16-pin DIP, SOIC, and 20-lead PLCC. REV. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that
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