SNOSDC9D October   2022  – May 2026 TLV1811-Q1 , TLV1812-Q1 , TLV1814-Q1 , TLV1821-Q1 , TLV1822-Q1 , TLV1824-Q1

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions:TLV18x1-Q1 TLV18x1L-Q1
    2.     Pin Functions:TLV1812-Q1 and TLV1822-Q1
    3.     Pin Functions: TLV1814-Q1 and TLV1824-Q1
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information - Single
    5. 5.5 Thermal Information - Dual
    6. 5.6 Thermal Information - Quad
    7. 5.7 Electrical Characteristics
    8. 5.8 Switching Characteristics
  7. 6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Inputs
        1. 7.4.1.1 TLV18xx Rail-to-Rail Input
        2. 7.4.1.2 ESD Protection
        3. 7.4.1.3 Unused Inputs
      2. 7.4.2 Outputs
        1. 7.4.2.1 TLV181x-Q1 Push-Pull Output
        2. 7.4.2.2 TLV182x-Q1 Open-Drain Output
      3. 7.4.3 Power-On Reset (POR)
      4. 7.4.4 Hysteresis
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Basic Comparator Definitions
        1. 8.1.1.1 Operation
        2. 8.1.1.2 Propagation Delay
        3. 8.1.1.3 Overdrive and Underdrive Voltage
      2. 8.1.2 Hysteresis
        1. 8.1.2.1 Inverting Comparator With Hysteresis
        2. 8.1.2.2 Non-Inverting Comparator With Hysteresis
        3. 8.1.2.3 Inverting and Non-Inverting Hysteresis using Open-Drain Output
    2. 8.2 Typical Applications
      1. 8.2.1 Window Comparator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Square-Wave Oscillator
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 Adjustable Pulse Width Generator
      4. 8.2.4 Time Delay Generator
      5. 8.2.5 Logic Level Shifter
      6. 8.2.6 One-Shot Multivibrator
      7. 8.2.7 Bi-Stable Multivibrator
      8. 8.2.8 Zero Crossing Detector
      9. 8.2.9 Pulse Slicer
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.1.2 Hysteresis

The basic comparator configuration can oscillate or produce a noisy "chatter" output if the applied differential input voltage is near the comparator's offset voltage. This typically occurs when the input signal is moving very slowly across the switching threshold of the comparator.

This problem can be prevented by the addition of hysteresis or positive feedback.

The hysteresis transfer curve is shown in Figure 8-2. This curve is a function of three components: VTH, VOS, and VHYST:

  • VTH is the actual set voltage or threshold trip voltage.
  • VOS is the internal offset voltage between VIN+ and VIN–. This voltage is added to VTH to form the actual trip point at which the comparator must respond to change output states.
  • VHYST is the hysteresis (or trip window) that is designed to reduce comparator sensitivity to noise.
TLV1811-Q1 TLV1821-Q1 TLV1812-Q1 TLV1822-Q1 TLV1814-Q1 TLV1824-Q1 Hysteresis Transfer CurveFigure 8-2 Hysteresis Transfer Curve

For more information, please see the Comparator with and without hysteresis circuit application note.