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LTC1444

Linear Technology
Part Number LTC1444
Manufacturer Linear Technology
Description Ultralow Power Quad Comparators
Published Mar 27, 2005
Detailed Description LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference FEATURES s s DESCRIPTIO ® s s s s s s s s Ult...
Datasheet PDF File LTC1444 PDF File

LTC1444
LTC1444

Overview
LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference FEATURES s s DESCRIPTIO ® s s s s s s s s Ultralow Quiescent Current: 8.
5µA Max Wide Supply Range Single: 2V to 11V Dual: ± 1V to ± 5.
5V Input Voltage Range Includes the Negative Supply Reference Output Drives 0.
01µF Capacitor Adjustable Hysteresis (LTC1444/LTC1445) TTL/CMOS Compatible Outputs Propagation Delay: 12µs (Typ) (10mV Overdrive) No Crowbar Current 40mA Continuous Source Current Pin Compatible Upgrades for MAX924 (LTC1443) The LTC 1443/LTC1444/LTC1445 are ultralow power quad comparators with a built-in reference.
The comparators feature less than 8.
5µA 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.
01µF 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.
U APPLICATIO S s s s s Battery-Powered System Monitoring Threshold Detectors Window Comparators Oscillator Circuits TYPICAL APPLICATIO VIN 3.
4M 1% 5V TO 8V Reference Settling Test Circuit 3 V+ 5 IN A+ V+ 5V 2 4 IN A – 8V 2mV/DIV + OUT VREF – LTC1445 V– 9 OUT 2ms/DIV LTC1443/1444/1445 • TA02 14 HYST 1.
21M 1% R1 10k R2 2.
4M 8...


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