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LT1720 Datasheet(PDF) 1 Page - Linear Technology |
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LT1720 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 LT1720/LT1721 Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs s UltraFast: 4.5ns at 20mV Overdrive 7ns at 5mV Overdrive s Low Power: 4mA per Comparator s Optimized for 3V and 5V Operation s Pinout Optimized for High Speed Ease of Use s Input Voltage Range Extends 100mV Below Negative Rail s TTL/CMOS Compatible Rail-to-Rail Outputs s Internal Hysteresis with Specified Limits s Low Dynamic Current Drain; 15 µA/(V-MHz), Dominated by Load In Most Circuits The LT ®1720/LT1721 are UltraFastTM dual/quad compara- tors optimized for single supply operation, with a supply voltage range of 2.7V to 6V. The input voltage range extends from 100mV below ground to 1.2V below the supply voltage. Internal hysteresis makes the LT1720/LT1721 easy to use even with slow moving input signals. The rail-to-rail outputs directly interface to TTL and CMOS. Alternatively, the sym- metric output drive can be harnessed for analog applications or for easy translation to other single supply logic levels. The LT1720 is available in the 8-pin MSOP and SO packages; three pins per comparator plus power and ground. The LT1721 is available in the 16-pin SSOP and S packages. The pinouts of the LT1720/LT1721 minimize parasitic effects byplacingthemostsensitiveinputs(inverting)awayfromthe outputs, shielded by the power rails. The LT1720/LT1721 are ideal for systems where small size and low power are paramount. , LTC and LT are registered trademarks of Linear Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. s High Speed Differential Line Receiver s Crystal Oscillator Circuits s Window Comparators s Threshold Detectors/Discriminators s Pulse Stretchers s Zero-Crossing Detectors s High Speed Sampling Circuits 2.7V to 6V Crystal Oscillator with TTL/CMOS Output – + C1 1/2 LT1720 2.7V TO 6V 2k 620 Ω 220 Ω 1MHz TO 10MHz CRYSTAL (AT-CUT) 2k 1720/21 TA01 0.01 µF 1.8k OUTPUT GROUND CASE Propagation Delay vs Overdrive OVERDRIVE (mV) 0 30 50 1720/21 TA02 10 20 40 8 7 6 5 4 3 2 1 0 25 °C VSTEP = 100mV VCC = 5V CLOAD = 10pF RISING EDGE (tPDLH) FALLING EDGE (tPDHL) FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO |
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