HTU21D – digital humidity/temperature sensor
Item number: HTU21D - HTU21D(F) Applications Vehicles & Road TrafficHeating/ Air conditioning/ VentilationEnvironmental monitoring / Environmental observation
Price on request
Delivery time:Delivery time on request
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.
The HTU21D’s semiconductor components are mounted in a (reflow) solderable 3 x 3 x 0.9 mm3 DFN chip package (dual-flat no-lead).
Variants of the HTU21D
The HTU21D is also available as the optional HTU21D(F) with a PTFE filter membrane to protect it from dust, liquid and contamination.
Features
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.
The HTU21D’s semiconductor components are mounted in a (reflow) solderable 3 x 3 x 0.9 mm3 DFN chip package (dual-flat no-lead).
Variants of the HTU21D
The HTU21D is also available as the optional HTU21D(F) with a PTFE filter membrane to protect it from dust, liquid and contamination.
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
Attributes of HTU21D – digital humidity/temperature sensor
May differ from supplier data
Basic data
Accuracy (%) 2 %
Humidity measurement range 0 to 100 % r.F.
Additional measurement possibilities Temperature
Measurement principle Capacitive
Humidity measurement type Relative humidity
Sensor type OEM humidity sensor
Measured medium Air/gases, non-aggressive Air, no pressure, non-aggressive
Product environmental influences (protection class/temperature)
Operating temperature range 0 to 50 °C
Signal inputs/outputs and interfaces
Interfaces/protocols I²C
Typical applications
Typical applications Heating/ventilation/air conditioning (HVAC) Air conditioning Weather stations Show all Automotive industry Air and drying plants
More functions and options
Additional functions/options PTFE filter