SNOSDF0 May   2024 TLV4H290-SEP , TLV4H390-SEP

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1. 4.1 Pin Functions:TLV4H290-SEP and TLV4H390-SEP Quad
  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, Quad
    5. 5.5 Electrical Characteristics, Quad
    6. 5.6 Switching Characteristics, Quad
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
    4. 6.4 Device Functional Modes
      1. 6.4.1 Outputs
        1. 6.4.1.1 TLV4H290-SEP Open Drain Output
        2. 6.4.1.2 TLV4H390-SEP Push-Pull Output
      2. 6.4.2 Power-On Reset (POR)
      3. 6.4.3 Inputs
        1. 6.4.3.1 Rail to Rail Input
        2. 6.4.3.2 Fault Tolerant Inputs
        3. 6.4.3.3 Input Protection
      4. 6.4.4 ESD Protection
      5. 6.4.5 Unused Inputs
      6. 6.4.6 Hysteresis
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Basic Comparator Definitions
        1. 7.1.1.1 Operation
        2. 7.1.1.2 Propagation Delay
        3. 7.1.1.3 Overdrive Voltage
      2. 7.1.2 Hysteresis
        1. 7.1.2.1 Inverting Comparator With Hysteresis
        2. 7.1.2.2 Non-Inverting Comparator With Hysteresis
        3. 7.1.2.3 Inverting and Non-Inverting Hysteresis using Open-Drain Output
    2. 7.2 Typical Applications
      1. 7.2.1 Window Comparator
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2 Square-Wave Oscillator
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Curve
      3. 7.2.3 Adjustable Pulse Width Generator
      4. 7.2.4 Time Delay Generator
      5. 7.2.5 Logic Level Shifter
      6. 7.2.6 One-Shot Multivibrator
      7. 7.2.7 Bi-Stable Multivibrator
      8. 7.2.8 Zero Crossing Detector
      9. 7.2.9 Pulse Slicer
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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7.2.1.2 Detailed Design Procedure

Configure the circuit as shown in Figure 7-7. Connect VCC to a 3.3V power supply and VEE to ground. Make R1, R2 and R3 each 10MΩ resistors. These three resistors are used to create the positive and negative thresholds for the window comparator (VTH+ and VTH–).

With each resistor being equal, VTH+ is 2.2V and VTH- is 1.1V. Large resistor values such as 10MΩ are used to minimize power consumption. The resistor values can be recalculated to provide the desired trip point values.

The sensor output voltage is applied to the inverting and noninverting inputs of the two comparators. Using two open-drain output comparators allows the two comparator outputs to be Wire-OR'ed together.

The respective comparator outputs are low when the sensor is less than 1.1V or greater than 2.2V. The respective comparator outputs are high when the sensor is in the range of 1.1V to 2.2V (within the "window"), as shown in Figure 7-8.
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