SNOSDC8C September   2022  – September 2023 TLV1811 , TLV1812 , TLV1814 , TLV1821 , TLV1822 , TLV1824

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1.     Pin Functions: TLV18x1 and TLV18x1L
    2.     Pin Functions: TLV1812 and TLV1822
    3.     Pin Functions: TLV1814 and TLV1824
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information - Single
    5. 6.5 Thermal Information - Dual
    6. 6.6 Thermal Information - Quad
    7. 6.7 Electrical Characteristics
    8. 6.8 Switching Characteristics
  8. 7 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Inputs
        1. 8.4.1.1 TLV18xx Rail-to-Rail Input
        2. 8.4.1.2 ESD Protection
        3. 8.4.1.3 Unused Inputs
      2. 8.4.2 Outputs
        1. 8.4.2.1 TLV181x Push-Pull Output
        2. 8.4.2.2 TLV182x Open-Drain Output
      3. 8.4.3 Power-On Reset (POR)
      4. 8.4.4 Hysteresis
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Basic Comparator Definitions
        1. 9.1.1.1 Operation
        2. 9.1.1.2 Propagation Delay
        3. 9.1.1.3 Overdrive Voltage
      2. 9.1.2 Hysteresis
        1. 9.1.2.1 Inverting Comparator With Hysteresis
        2. 9.1.2.2 Non-Inverting Comparator With Hysteresis
        3. 9.1.2.3 Inverting and Non-Inverting Hysteresis using Open-Drain Output
    2. 9.2 Typical Applications
      1. 9.2.1 Window Comparator
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Square-Wave Oscillator
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curve
      3. 9.2.3 Adjustable Pulse Width Generator
      4. 9.2.4 Time Delay Generator
      5. 9.2.5 Logic Level Shifter
      6. 9.2.6 One-Shot Multivibrator
      7. 9.2.7 Bi-Stable Multivibrator
      8. 9.2.8 Zero Crossing Detector
      9. 9.2.9 Pulse Slicer
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.3 Adjustable Pulse Width Generator

Figure 9-12 is a variation on the square wave oscillator that allows adjusting the pulse widths.

R4 and R5 provide separate charge and discharge paths for the capacitor C depending on the output state.

GUID-20210224-CA0I-VNV2-MNJT-B0ZLZFM1QSBD-low.gifFigure 9-12 Adjustable Pulse Width Generator

The charge path is set through R5 and D2 when the output is high. Similarly, the discharge path for the capacitor is set by R4 and D1 when the output is low.

The pulse width t1 is determined by the RC time constant of R5 and C. Thus, the time t2 between the pulses can be changed by varying R4, and the pulse width can be altered by R5. The frequency of the output can be changed by varying both R4 and R5. At low voltages, the effects of the diode forward drop (0.8 V, or 0.15 V for Shottky) must be taken into account by altering output high and low voltages in the calculations.