HDC2022 Low-Power Humidity and Temperature Sensor

Texas Instruments' HDC2022 is an integrated relative humidity and temperature sensor with a factory-installed PTFE membrane cover over the opening of the relative humidity sensor. The cover is a hydrophobic microporous PTFE foil that protects against dust and water according to IP67 specifications. The cover is designed to adhere to the package over lifetime operation while maintaining the same response time as a sensor without the membrane. The cover has a filtration efficiency of 99.99% down to a particle size of 100 nm.

The HDC2022 is backward-compatible with the HDC2080, providing high-accuracy measurements with very low power consumption in a small DFN package. The capacitive-based sensor includes integrated digital features and a heating element to dissipate condensation and moisture. The HDC2022 digital features include programmable interrupt thresholds to provide alerts and system wakeups without requiring a microcontroller (MCU) to continuously monitor the system. Combined with programmable sampling intervals, low power consumption, and 1.8 V supply voltage support, the sensor is designed for ultra-low-power battery-operated systems.