SNOS749G September   1995  – November 2025 LMC6772 , LMC6772-Q1

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Operating Ratings
    3. 5.3 2.7V Electrical Characteristics
    4. 5.4 5.0V and 15.0V Electrical Characteristics
    5. 5.5 AC Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6Application Information
    1. 6.1 Application Information Disclaimer
    2. 6.2 Input Common-Mode Voltage Range
    3. 6.3 Low Voltage Operation
    4. 6.4 Output Short Circuit Current
    5. 6.5 Hysteresis
    6. 6.6 Spice Macromodel
    7. 6.7 Typical Applications
      1. 6.7.1 Universal Logic Level Shifter
      2. 6.7.2 One-Shot Multivibrator
      3. 6.7.3 Bi-Stable Multivibrator
      4. 6.7.4 Zero Crossing Detector
      5. 6.7.5 Oscillator
  8. 7Device and Documentation Support
    1. 7.1 Documentation Support
    2. 7.2 Trademarks
    3. 7.3 Electrostatic Discharge Caution
    4. 7.4 Glossary
  9. 8Revision History
  10. 9Mechanical, Packaging, and Orderable Information

6.2 Input Common-Mode Voltage Range

At supply voltages of 2.7V, 5V and 15V, the LMC6772 has an input common-mode voltage range which exceeds both supplies. As in the case of operational amplifiers, CMVR is defined by the VOS shift of the comparator over the common-mode range of the device. A CMRR (ΔVOS/ΔVCM) of 75dB (typical) implies a shift of < 1mV over the entire common-mode range of the device. The absolute maximum input voltage at V+ = 5V is 200mV beyond either supply rail at room temperature.

LMC6772 An Input Signal Exceeds the LMC6772 Power Supply Voltages with No Output Phase InversionFigure 6-1 An Input Signal Exceeds the LMC6772 Power Supply Voltages with No Output Phase Inversion

A wide input voltage range means that the comparator can be used to sense signals close to ground and also to the power supplies. This is an extremely useful feature in power supply monitoring circuits.

An input common-mode voltage range that exceeds the supplies, 20fA input currents (typical), and a high input impedance makes the LMC6772 well suited for sensor applications. The LMC6772 can directly interface to sensors without the use of amplifiers or bias circuits. In circuits with sensors which produce outputs in the tens to hundreds of millivolts, the LMC6772 can compare the sensor signal with an appropriately small reference voltage. This reference voltage can be close to ground or the positive supply rail.