Abstract

Relative humidity (RH) sensors play a critical role in today’s electronic systems, supporting accurate environmental monitoring in a wide range of applications—from server rooms and industrial automation, to electric vehicles and smart infrastructure. By providing real-time data on ambient conditions, these sensors help protect sensitive systems, improve performance, and maintain overall reliability. This Application Note provides practical guidance for selecting and integrating Texas Instruments’ humidity sensors across three product generations: HDC1x (first generation), HDC2x (second generation), and HDC3x (third and latest generation). While each device family offers temperature and humidity measurement capabilities, each series features unique interface protocols and configuration options. The content presented in this application note is intended to simplify the process of evaluating and implementing TI's humidity sensors for a given system design.