Features and Benefits

  • 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

Product Details

The LTC1843 is an ultralow power dual comparator with a built-in reference. 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 LTC1843 operate from a single 2.5V to 11V supply or a dual ±1.25V to ±5.5V supply. Hysteresis is easily programmed by using two resistors and the HYST pin. The comparator inputs operate from the negative supply to within 1.3V of the positive supply. The comparator outputs 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 LTC1843 is available in an SO-8 package.


  • Battery-Powered System Monitoring
  • Threshold Detectors
  • Window Comparators
  • Oscillator Circuits

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.


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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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