SNOSDJ3 May   2024 TLV1812-EP

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5.   Pin Configuration and Functions
  6. 4Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 ESD Ratings
    3. 4.3 Thermal Information - EP
    4. 4.4 Recommended Operating Conditions
    5. 4.5 Electrical Characteristics
    6. 4.6 Switching Characteristics
    7. 4.7 Typical Characteristics
  7. 5Detailed Description
    1. 5.1 Overview
    2. 5.2 Functional Block Diagrams
    3. 5.3 Feature Description
    4. 5.4 Device Functional Modes
      1. 5.4.1 Inputs
        1. 5.4.1.1 TLV18x2-EP Rail-to-Rail Input
        2. 5.4.1.2 ESD Protection
        3. 5.4.1.3 Unused Inputs
      2. 5.4.2 Outputs
        1. 5.4.2.1 TLV1812-EP Push-Pull Output
        2. 5.4.2.2 TLV1822-EP Open-Drain Output
      3. 5.4.3 Power-On Reset (POR)
      4. 5.4.4 Hysteresis
  8. 6Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Basic Comparator Definitions
        1. 6.1.1.1 Operation
        2. 6.1.1.2 Propagation Delay
        3. 6.1.1.3 Overdrive Voltage
      2. 6.1.2 Hysteresis
        1. 6.1.2.1 Inverting Comparator With Hysteresis
        2. 6.1.2.2 Non-Inverting Comparator With Hysteresis
        3. 6.1.2.3 Inverting and Non-Inverting Hysteresis using Open-Drain Output
    2. 6.2 Typical Applications
      1. 6.2.1 Window Comparator
        1. 6.2.1.1 Design Requirements
        2. 6.2.1.2 Detailed Design Procedure
        3. 6.2.1.3 Application Curve
      2. 6.2.2 Square-Wave Oscillator
        1. 6.2.2.1 Design Requirements
        2. 6.2.2.2 Detailed Design Procedure
        3. 6.2.2.3 Application Curve
      3. 6.2.3 Adjustable Pulse Width Generator
      4. 6.2.4 Time Delay Generator
      5. 6.2.5 Logic Level Shifter
      6. 6.2.6 One-Shot Multivibrator
      7. 6.2.7 Bi-Stable Multivibrator
      8. 6.2.8 Zero Crossing Detector
      9. 6.2.9 Pulse Slicer
    3. 6.3 Power Supply Recommendations
    4. 6.4 Layout
      1. 6.4.1 Layout Guidelines
      2. 6.4.2 Layout Example
  9. 7Device and Documentation Support
    1. 7.1 Documentation Support
      1. 7.1.1 Related Documentation
    2. 7.2 Receiving Notification of Documentation Updates
    3. 7.3 Support Resources
    4. 7.4 Trademarks
    5. 7.5 Electrostatic Discharge Caution
    6. 7.6 Glossary
  10. 8Revision History
  11. 9Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.2.8 Zero Crossing Detector

TLV1812-EP TLV1822-EP Zero Crossing DetectorFigure 6-17 Zero Crossing Detector

A voltage divider of R4 and R5 establishes a reference voltage V1 at the non-inverting input. By making the series resistance of R1 and R2 equal to R5, the comparator will switch when VIN = 0. Diode D1 insures that V3 clamps near ground. The voltage divider of R2 and R3 then prevents V2 from going below ground. A small amount of hysteresis is setup to ensure rapid output voltage transitions.