SBOU319A November   2024  – June 2025

 

  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

3.2.2 Layout Guidelines

Use the following considerations for HDC3120EVM layouts.

  • To minimize second and other even-harmonic content, route traces as symmetrically as possible for both positive and negative feedback pathways.
  • Place feedback components in close proximity to the output and input pins of the device.
  • Position decoupling capacitors on the top layer as close as possible to the IC power supply pins.
  • Place independent vias for each component ground pads to provide a low-impedance return path.