SNOU202 April   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Recommended Equipment Setup
    2. 2.2 Board Setup
      1. 2.2.1 Power Supplies
      2. 2.2.2 Inputs
      3. 2.2.3 Outputs
      4. 2.2.4 Hysteresis
    3. 2.3 Quick-Start Procedure using TLV1H103
  7. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials
  8. 4Additional Information
    1. 4.1 Trademarks

2.2.4 Hysteresis

The HS-COMPARATOR-EVM is able to support both external hysteresis and devices with an integrated hysteresis pin.

External hysteresis can be applied through external component R6, a feedback resistor, and R1, a series resistor for IN+. Necessary calculations for the hysteresis window must be made to figure out the value of both resistors.

GUID-20240328-SS0I-NTP1-CT8L-M0TVZJTNNSMW-low.svg Figure 2-4 External Hysteresis Schematic

For devices such as the TLV1H103 that utilizes a hysteresis pin called LE/HYST, the internal hysteresis can be adjusted through the attachment of an external resistor (R7) connecting to VEE.

Alternatively, the pin also functions as an inverting Latch Enable. If the pin is connected to VEE, then the device holds the output state for as long as the pin remains connected to that voltage. If the pin is connected to VCC, then the device functions normally with no hysteresis. Connections for VCC and VEE are supplied through J9 with R7 being populated with a 0Ω resistor. However, if necessary to control when the device latches, then a pulsing signal can be applied to SMA connector J6, with SMA connector J7 being the corresponding sense line for that input.

GUID-20240328-SS0I-MH48-6HWR-TFPVBHZXTHQB-low.svgFigure 2-5 LE/HYST Block Diagram