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LTC1843

Linear Technology
Part Number LTC1843
Manufacturer Linear Technology
Description Ultralow Power Dual Comparators
Published Mar 27, 2005
Detailed Description LTC1841/LTC1842/LTC1843 Ultralow Power Dual Comparators with Reference FEATURES s s DESCRIPTION The LTC ®1841/LTC1842/L...
Datasheet PDF File LTC1843 PDF File

LTC1843
LTC1843

Overview
LTC1841/LTC1842/LTC1843 Ultralow Power Dual Comparators with Reference FEATURES s s DESCRIPTION The LTC ®1841/LTC1842/LTC1843 are ultralow power dual comparators with built-in reference (LTC1842/LTC1843).
The comparators feature less than 5.
7µA supply current over temperature, a 1.
182V ± 1% reference, programmable hysteresis and open-drain outputs that sink current.
The reference output can drive a bypass capacitor of up to 0.
01µF without oscillation.
The LTC1841 operates from a single 2V to 11V supply or a dual ± 1V to ± 5.
5V supply.
The LTC1842/LTC1843 operate from a single 2.
5V to 11V supply or a dual ± 1.
25V to ± 5.
5V supply.
The LTC1842/LTC1843 hysteresis is easily programmed by using two resistors and the HYST pin.
The comparators’ input operates from the negative supply to within 1.
3V of the positive supply.
The comparators’ output stage can typically sink greater than 20mA.
By eliminating the cross-conduction current that normally happens when the comparators change logic states, power supply glitches are eliminated.
The LTC1841/LTC1842/LTC1843 are available in SO-8 packages.
s s s s s s Ultralow Quiescent Current: 3.
5µA Typ Open-Drain Outputs Typically Sink Greater Than 20mA Wide Supply Range: (LTC1841) Single: 2V to 11V Dual: ± 1V to ± 5.
5V Input Voltage Range Includes the Negative Supply Reference Output Drives 0.
01µF Capacitor Adjustable Hysteresis 12µs Propagation Delay with 10mV Overdrive No Current Spike When Switching U APPLICATIONS s s s s Battery-Powered System Monitoring Threshold Detectors Window Comparators Oscillator Circuits , LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION Single Li-Ion Cell to 5V Supply 1-CELL Li-Ion BATTERY R1 1.
5M + C1 100µF R6 25k 7 VCC LTC1843 OUT B 8 6 VIN L1 10µH 7 SW D1 4 IN B – – + SUPPLY CURRENT (µA) R2 100k 3 IN A+ R3 1M LT1302-5 Si9924DY 3 SHDN IT 8 4 PGND SENSE VC GND 2 RC 20k CC 0.
0µF 1 OUTPUT 5V 600mA + C2 100µF + OUT A 1 R7 500k 6 REF – V– 2 H...


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