SNOSDK3 September   2024 TLV3603-EP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  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
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Diagrams
    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 Inputs
      2. 6.4.2 Push-Pull (Single-Ended) Output
      3. 6.4.3 Known Startup Condition
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Adjustable Hysteresis
      2. 7.1.2 Capacitive Loads
      3. 7.1.3 Latch Functionality
    2. 7.2 Typical Application
      1. 7.2.1 Implementing Adjustable Hysteresis
        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 Optical Receiver
      3. 7.2.3 Over-Current Latch Condition
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    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. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.1.1 Adjustable Hysteresis

As a result of a comparator’s high open loop gain, there is a small band of input differential voltage where the output can toggle back and forth between “logic high” and “logic low” states ("Chatter"). This can cause design challenges for inputs with slow rise and fall times or systems with excessive noise. These challenges can be overcome by adding hysteresis to the comparator.

The TLV3603-EP has a LE/HYS pin that can be used to increase the internal hysteresis of the comparator. To change the internal hysteresis of the comparator, connect a single resistor as shown in the adjusting hysteresis figure between the LE/HYS pin and VEE. A curve of hysteresis versus resistance is provided below to provide guidance in setting the desired amount of hysteresis.

TLV3603-EP Adjustable Hysteresis using External ResistorFigure 7-1 Adjustable Hysteresis using External Resistor
TLV3603-EP Adjustable Hysteresis using External VoltageFigure 7-2 Adjustable Hysteresis using External Voltage
TLV3603-EP Hysteresis vs. RHYS at VCC = 5VFigure 7-3 Hysteresis vs. RHYS at VCC = 5V
TLV3603-EP Hysteresis vs. VHYS at VCC = 5VFigure 7-4 Hysteresis vs. VHYS at VCC = 5V

To provide dynamic hysteresis, an external 0.7V to 1.2V voltage, such as from a DAC, can be forced into the LE/HYST pin, as shown in Figure 7-2 and Figure 7-4. The LE/HYST pin can be internally modeled as a 40k resistor in series with a 1.25V source to VEE, so any driving circuitry must be able to sink up to 32uA. Note that the output goes into latch when LE/HYST is ≤ 400mV, or go into shutdown when ≥ 1.25V.