SNOU164B September   2018  – June 2024 TLV4021 , TLV4041

 

  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 How to Use the TLV40x1EVM for Evaluation or System Prototypes
      1. 2.1.1 Usage Example
  7. 3Hardware Design Files
    1. 3.1 TLV40x1EVM Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  8. 4Additional Information
    1. 4.1 Trademarks
  9. 5Revision History

2.1.1 Usage Example

Figure 3-1 shows a typical use case of TLV4021R1 as an undervoltage monitor. Resistors R1 and R2 need to be installed on the EVM and the voltage to be monitored is applied to IN_AUX (DIP PIN 7). The configuration detects an undervoltage condition when the input voltage at IN_AUX drops below 2V. The output pull-up resistor R3 is connected to a 1.8V supply through VPU (DIP PIN2). The example assumes that the logic device that is connected to the output of the comparator operates at 1.8V.

TLV4021-41EVM Usage ExampleFigure 2-1 Usage Example

Listed below is the equation for deriving values for R1 and R2. For more details on this application, refer to the Applications section of the TLV40x1 Small-Size, Low-Power Comparator with Precision Reference data sheet.

Equation 1. R1= (VTH- VIT-)VIT- × R2