SLVSE13H September   2017  – July 2021 TLV7031 , TLV7032 , TLV7034 , TLV7041 , TLV7042 , TLV7044

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2.     Pin Functions: TLV7032/42
    3.     Pin Functions: TLV7034/44
  6. 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 (Single)
    8. 6.8  Switching Characteristics (Single)
    9. 6.9  Electrical Characteristics (Dual)
    10. 6.10 Switching Characteristics (Dual)
    11. 6.11 Electrical Characteristics (Quad)
    12. 6.12 Switching Characteristics (Quad)
    13. 6.13 Timing Diagrams
    14. 6.14 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Inputs
      2. 7.4.2 Internal Hysteresis
      3. 7.4.3 Output
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Inverting Comparator With Hysteresis for TLV703x
      2. 8.1.2 Noninverting Comparator With Hysteresis for TLV703x
    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 IR Receiver Analog Front End
        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 Square-Wave Oscillator
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curve
      4. 8.2.4 Quadrature Rotary Encoder
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
        3. 8.2.4.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Evaluation Module
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.3.2 Detailed Design Procedure

The oscillation frequency is determined by the resistor and capacitor values. The following section provides details to calculate these component values.

GUID-FD76B04A-8FDE-46A3-B664-3E55E664CC88-low.pngFigure 8-8 Square-Wave Oscillator Timing Thresholds

First consider the output of figure Figure 8-7 is high, which indicates the inverted input VC is lower than the noninverting input (VA). This causes the C1 to be charged through R4, and the voltage VC increases until it is equal to the noninverting input. The value of VA at the point is calculated by Equation 7.

Equation 7. GUID-527C0609-3CB2-41B2-A3FB-5A43453147EE-low.gif

If R1 = R2= R3, then VA1 = 2 VCC/ 3

At this time the comparator output trips pulling down the output to the negative rail. The value of VA at this point is calculated by Equation 8.

Equation 8. GUID-FACC8258-6087-4470-8ECE-573273AA3D63-low.gif

If R1 = R2 = R3, then VA2 = VCC/3

The C1 now discharges though the R4, and the voltage VCC decreases until it reaches VA2. At this point, the output switches back to the starting state. The oscillation period equals the time duration from 2 VCC / 3 to VCC / 3 then back to 2 VCC / 3, which is given by R4C1 × ln2 for each trip. Therefore, the total time duration is calculated as 2 R4C1 × ln2. The oscillation frequency can be obtained by Equation 9:

Equation 9. GUID-5949E193-3096-4C6B-AA11-A518D5710B62-low.gif