SNAA420
June 2025
HDC3020
,
HDC3020-Q1
,
HDC3021
,
HDC3021-Q1
,
HDC3022
,
HDC3022-Q1
1
Abstract
Trademarks
1
Introduction
1.1
Motivation
1.2
The Physics of Humidity and Water Ingress
2
Test Methodology
3
Assumptions
4
Proposed Algorithm Using Slew Rate Threshold
5
Test Results
5.1
Test Results at Indoor Ambient Conditions
5.2
Test Results at Hot and Cold Temperature Conditions
5.3
Vent Submersion and Air Exchange Tests
6
Summary
7
References
Application Note
Humidity Sensor-Based Water Ingress Monitoring for Automotive Electronics