The digital HTU21D OEM sensor is a combination of capacitive humidity sensing element and temperature sensor. Each sensor is individually calibrated, compensated for and tested.The humidity can be measured within a range of 0 to 100% RH. The temperature sensor is designed for a range of -40 to 125°C.The outputs for humidity and temperature in I²C format are suitable for further data processing using simple, inexpensive microcontrollers. The resolution of the HTU21D can be programmed (8/12 bits to 12/14 bits RH/T).As the sensor has a low power consumption it is suitable for battery operation, with information on the current battery level provided.Secure data transmission is ensured by a CLC or cyclic redundancy check. Humidity and temperature signal response times and the recovery time (following full saturation) are within a range of a few seconds.
Features
Humidity range of 0 to 100% RH
Temperature range of -40 to +125°C
Digital I²C interface
Accuracy of ±2% RH
Supply voltage of 1.5 to 3.6 V
Short signal times
Settable resolution
Fast recovery time after saturation
Electrical ID code
Low power dissipation of 2.7 μW
Small DFN package
RoHS and REACH compliant
Applications
Car cabins
Household appliances
Medical equipment
Electrical devices
Humidifiers/dehydrators and driers
Air conditioning systems
Weather stations
Security systems
Multimedia devices (smartphones, tablets)