SNOS748F September   1999  – December 2025 LMC7221

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 Operating Ratings
    3. 4.3 Electrical Characteristics: 2.7 V
    4. 4.4 Electrical Characteristics: 5.0 V and 15.0 V
    5. 4.5 Leakage Characteristics
    6. 4.6 AC Electrical Characteristics
    7. 4.7 Typical Characteristics
  6. 5Application and Implementation
    1. 5.1 Application Information
      1. 5.1.1  Benefits of the LMC7221 Tiny Comparator
        1. 5.1.1.1  Size
        2. 5.1.1.2  Height
        3. 5.1.1.3  Simplified Board Layout
        4. 5.1.1.4  Low Supply Current
        5. 5.1.1.5  Wide Voltage Range
        6. 5.1.1.6  Digital Outputs Representing Signal Level
        7. 5.1.1.7  Open Drain Output
        8. 5.1.1.8  Driving LEDs (Light Emitting Diodes)
        9. 5.1.1.9  Input Range to Beyond Rail to Rail
        10. 5.1.1.10 Zero Crossing Detector
        11. 5.1.1.11 Low Input Currents and High Input Impedance
        12. 5.1.1.12 Direct Sensor Interfacing
      2. 5.1.2  Low Voltage Operation
      3. 5.1.3  Open Drain Output
        1. 5.1.3.1 Output Stage
      4. 5.1.4  Output Short Circuit Current
      5. 5.1.5  Input Protection
      6. 5.1.6  Layout Considerations
      7. 5.1.7  Push-Pull Outputs, Dual Versions
      8. 5.1.8  Additional 5-Pin SOT-23 Tiny Devices
      9. 5.1.9  Spice Macromodel
      10. 5.1.10 Device and Documentation Support
        1. 5.1.10.1 Receiving Notification of Documentation Updates
        2. 5.1.10.2 Support Resources
        3. 5.1.10.3 Trademarks
        4. 5.1.10.4 Electrostatic Discharge Caution
        5. 5.1.10.5 Glossary
  7. 6Device and Documentation Support
    1. 6.1 Receiving Notification of Documentation Updates
    2. 6.2 Support Resources
    3. 6.3 Trademarks
    4. 6.4 Electrostatic Discharge Caution
    5. 6.5 Glossary
  8. 7Revision History
  9. 8Mechanical, Packaging, and Orderable Information

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5.1.1.10 Zero Crossing Detector

Since the LMC7221's common mode input range extends below ground even when powered by a single positive supply, it can be used with large input resistors as a zero crossing detector.