Texas Instruments HDC2021
The HDC2021 is an integrated relative humidity and temperature sensor with a factory-installed polyimide tape cover over the opening of the relative humidity sensor element. The tape cover provides protection against pollutants that can appear in certain stages of the manufacturing process, such as SMT assembly, PCB board wash, and conformal coating. The tape design allows for a full conformal coating of the PCB, and includes an adhesive free corner tab for quick removal using tweezers.| Part No. | HDC2021 |
|---|---|
| Datasheet | HDC2021 Download |
| Manufacturer |  Texas Instruments |
| Description | Low-Power Humidity and Temperature Sensor |
| Buy | Stock & Price |
FEATURES
● Factory-installed polyimide tape to protect sensor during assembly● RH measurement range: 0% to 100%
● Temperature measurement range: –40°C to 125°C
● Humidity accuracy: ±2% (typical), ±3% (maximum)
● Temperature accuracy: ±0.2°C (typical), ±0.4°C (maximum)
● Supply voltage range: 1.62 V to 3.6 V
● I2C interface compatibility
● 50 nA sleep mode current
● 550 nA average supply current (11-bit accuracy option, 1 measurement/second)
● Continuous conversion or one-shot measurement mode
● Backward-compatible with HDC2080 2
APPLICATIONS
● Thermostats● Smart speakers (with voice assistant)
● Washers and dryers
● HVAC sensor transmitters (temperature, pressure, and humidity)
● HVAC system controllers
● Wireless environmental sensors HDC2021 RH Sensor Registers ADC + Temperature Logic Sensor VDD VDD VDD SCL SDA I2C DRDY/INT ADDR I2C Master GPIO MCU Calibration GND GND Typical Application 3
DESCRIPTION
The HDC2021 device is backward-compatible with the HDC2080, providing high accuracy measurements with very low power consumption in a small DFN package.
