Texas Instruments HDC2022 Humidity & Temperature Digital Sensor
Texas Instruments HDC2022 Humidity and Temperature Digital Sensor is an integrated 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's over-lifetime operation while maintaining the same response time as a sensor without the membrane. The HDC2022 cover has a filtration efficiency of 99.99% down to a particle size of 100nm.
The device 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 digital features include programmable interrupt thresholds to provide alerts and system wake-ups without requiring a microcontroller to monitor the system continuously. Combined with programmable sampling intervals, low power consumption, and 1.8V supply voltage support, the Texas Instruments HDC2022 is designed for ultra-low power battery-operated systems.
Features
- Factory-installed IP67-rated water and dust protection cover
- 0% to 100% RH measurement range
- –40°C to 125°C temperature measurement range
- ±2% (typical), ±3% (maximum) humidity accuracy
- ±0.2°C (typical), ±0.4°C (maximum) temperature accuracy
- 1.62V to 3.6V supply voltage range
- I2C interface compatibility
- 50nA sleep mode current
- 550nA average supply current (11-bit accuracy option, one measurement/second)
- Continuous conversion or one-shot measurement mode
- Backward-compatible with HDC2080
Applications
- Thermostats
- Smart speakers (with voice assistant)
- HVAC sensor transmitters (temperature, pressure, and humidity)
- Washers and dryers
- HVAC system controllers
- Wireless environmental sensors
Functional Block Diagram
Related Development Tool
Texas Instruments HDC2022EVM Sensor Evaluation Module (EVM)
Evaluates the operation and performance of the HDC2022 relative humidity and temperature sensor.