The HTU21DF is a digital relative humidity and temperature sensor manufactured by TE Connectivity. This sensor provides accurate and reliable measurements in a small form factor. It utilizes a capacitive polymer sensor for relative humidity and a bandgap sensor for temperature, both integrated on a single chip.

Applications:

• HVAC Systems
• Weather Stations
• Refrigeration Systems
• Medical Devices
• Data Loggers
• Home Appliances
• Agricultural Monitoring

Features:

• Digital Output: Provides calibrated digital signals for both humidity and temperature via I2C interface.
• High Accuracy: Offers typical accuracy of ±2% RH and ±0.3°C.
• Wide Operating Range: Operates over a wide temperature and humidity range.
• Low Power Consumption: Suitable for battery-powered applications.
• Small Size: Compact footprint for easy integration.
• Reflow Solderable: Compatible with standard reflow soldering processes.
• Individually Calibrated: Each sensor is calibrated for high accuracy.

Benefits:

• Precise Measurements: Provides accurate and reliable humidity and temperature data.
• Easy Integration: Digital output simplifies interfacing with microcontrollers.
• Low Power: Extends battery life in portable devices.
• Compact Design: Saves space in space-constrained applications.
• Cost-Effective: Offers a good balance of performance and price.

Additional Details:

The HTU21DF communicates via the I2C interface, requiring only two wires for data communication. The sensor incorporates on-chip signal processing and calibration data. The typical supply voltage is 3.3V. The humidity measurement range is 0 to 100% RH, and the temperature measurement range is -40 to +125°C. The device is available in a small DFN (Dual Flat No-Leads) package. A filter membrane protects the sensor from dust and contaminants. The datasheet provides detailed information on the I2C communication protocol, measurement timing, and other important specifications.