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LTC1444CN Datasheet(PDF) 1 Page - Linear Technology |
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LTC1444CN Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference s Ultralow Quiescent Current: 8.5 µA Max s Wide Supply Range Single: 2V to 11V Dual: ±1V to ±5.5V s Input Voltage Range Includes the Negative Supply s Reference Output Drives 0.01 µF Capacitor s Adjustable Hysteresis (LTC1444/LTC1445) s TTL/CMOS Compatible Outputs s Propagation Delay: 12 µs (Typ) (10mV Overdrive) s No Crowbar Current s 40mA Continuous Source Current s Pin Compatible Upgrades for MAX924 (LTC1443) The LTC ®1443/LTC1444/LTC1445areultralowpowerquad comparators with a built-in reference. The comparators feature less than 8.5 µA supply current over temperature, an internal reference (1.182V ±1% for LTC1443 or 1.221V ±1% for LTC1444/LTC1445), programmable hysteresis (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ LTC1445) that sinks and sources current (open-drain output for LTC1444). The reference output can drive a bypass capacitor of up to 0.01 µF without oscillation. The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1443). Comparator hysteresis is easily programmable using two resistors and the HYST pin (LTC1444/LTC1445). Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The LTC1443/LTC1445 comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, power supply glitches are eliminated. The LTC1443/LTC1444/LTC1445 are available in the 16-pin SO and PDIP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. s Battery-Powered System Monitoring s Threshold Detectors s Window Comparators s Oscillator Circuits Reference Settling Test Circuit – + IN A+ 5 OUT V+ V– R1 10k R3 430 Ω R2 2.4M C1 1.0 µF IN A– HYST REF 4 14 8 5V TO 8V LTC1443/44/45 • TA01 LTC1445 3 9 2 1.21M 1% 3.4M 1% VIN Reference Settling 8V 5V VREF OUT V+ 2ms/DIV LTC1443/1444/1445 • TA02 FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO |
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