The LTC8721/LTC8722/LTC8723 are tiny, single- and dual- channel comparators with push-pull output that offer the ultimate combination of high speed (66 ns propagation delay) and very low power consumption (22 μA), available in extremely small packages with features such as rail-to-rail inputs, low offset voltage (0.8 mV), large output drive current, and a wide range of supply voltages from 1.7 V to 5.5 V. The devices are very easy to implement in a wide variety of applications where require critical response time,power-sensitive, low-voltage, and/or tight board space.

The output of the LTC8721/LTC8722/LTC8723 pulls to within 0.1 V of either supply rail without external pull-up circuitry, making these devices ideal for interface with both CMOS and TTL logics. All input and output pins can tolerate a continuous short-circuit fault condition to either rail. Internal hysteresis ensures clean output switching, even with slow-moving input signals.

The LTC8721/LTC8723 (single) is available in both SOT23-5L and SC70-5L packages. The LTC8722 (dual) is offered in DFN-8L, SOIC-8L and MSOP-8L packages. All devices are rated over -40 ℃ to +125 ℃ industrial temperature range.


Advantages And Characteristics

  • Micro-power Operating Current (22 μA) Preserves Battery Power
  • Fast 66 ns Propagation Delay (100-mV Overdrive)
  • Single 1.7 V to 5.5 V Supply Voltage Range
– Can be Powered From the Same 1.8V/2.5V/3.3V/5V System Rails
  • Rail-to-Rail Input
  • Push-Pull Output Current Drive: 30 mA Typically at 5V Supply
  • Internal Hysteresis for Clean Switching
  • Internal RF/EMI Filter
  • Operating Temperature Range: -40 ℃ to +125 ℃


  • Consumer Accessories
  • Handsets, Tablets and Notebooks
  • Portable and Battery-Powered Devices
  • Threshold Detectors and Discriminators
  • Alarms and Monitoring Circuits
  • Zero-Crossing Detectors
  • Window Comparators
  • Level Translators
  • Line Receivers
  • IR Receivers

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