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LTC1540CMS8 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1540CMS8 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page ![]() 1 LTC1540 sn1540 1540fas APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATIO Nanopower Comparator with Reference V + R1 4.32M 1% R2 3M 1% 3.3V V – 21 7 8 GND OUT LTC1540 1540 • TA01 IN+ IN– HYST REF 3 4 5 6 – + TEMPERATURE (°C) –40 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 20 60 1540 • TA02 –20 0 40 80 100 V+ = 5V V– = GND = 0V The LTC ®1540 is an ultralow power, single comparator with built-in reference. The comparator’s features include less than 0.6µA supply current over the commer- cial temperature range, a 1.182V ±2% reference, pro- grammable hysteresis and TTL/CMOS outputs that sink and source current. The reference output can drive a bypass capacitor of up to 0.01µF without oscillation. The comparator operates from a single 2V to 11V supply or a dual ±1V to ±5.5V supply. Comparator hysteresis is easily programmed by using two resistors and the HYST pin. Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The compara- tor output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally occur when the comparator changes logic states, power supply glitches are eliminated. The LTC1540 is available in the 8-pin MSOP and SO packages. For space limited applications, the LTC1540 is available in a 3mm x 3mm low profile (0.8mm) dual fine- pitch leadless package (DFN). Nanopower 2.9V VCC Threshold Detector LTC1540 Supply Current vs Temperature ■ Ultralow Quiescent Current: 0.3 µA Typ ■ Reference Output Drives 0.01 µF Capacitor ■ Adjustable Hysteresis ■ Available in 3mm x 3mm x 0.8mm DFN Package ■ Wide Supply Range: 2V to 11V ■ Input Voltage Range Includes the Negative Supply ■ Reference Output Sources Up to 1mA ■ TTL/CMOS Compatible Outputs ■ 60µs Propagation Delay with 10mV Overdrive ■ No Crowbar Current ■ 40mA Continuous Source Current ■ Pin Compatible with LTC1440, MAX921, MAX931 , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Battery-Powered System Monitoring ■ Threshold Detectors ■ Window Comparators ■ Oscillator Circuits |
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