SBOU319A November   2024  – June 2025 HDC3120

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 HDC3120EVM Specifications
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup and Interface
      1. 2.1.1 Setup Overview
      2. 2.1.2 Connecting Board Power and Ground
      3. 2.1.3 Connecting to the HDC3120 and Comparator Outputs
      4. 2.1.4 Temperature
      5. 2.1.5 Relative Humidity (RH)
      6. 2.1.6 HDC3120EVM Buttons
        1. 2.1.6.1 Reset Button (SW1)
        2. 2.1.6.2 Heater Enable Switch (S2)
    2. 2.2 Comparator Function
  9. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
      1. 3.2.1 Layout Overview
      2. 3.2.2 Layout Guidelines
    3. 3.3 Bill of Materials (BOM)
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5Related Documentation
  12. 6Revision History

2.1.6.2 Heater Enable Switch (S2)

The heater enable switch is a sliding style mechanism which when moved to the 'ON' position, a red LED (D1) illuminates to indicate the heater is running and the user must observe the temperature output increasing while humidity decreases. After the heater has been switched off, press the reset button (SW1) before reading temperature and humidity outputs to verify consistent readings.

CAUTION:

During heater operation, avoid contact with the HDC3120 as the temperature can exceed 55°C. Additionally, running the heater for an extended period of time is not recommended to avoid potential damage to the sensor.