New HDC3020 and HDC3020-Q1 Humidity Sensors with High Accuracy, Low Power and Drift Correction

29 June 2021 - 0 Comments

Texas Instruments has introduced new humidity sensors that provide low power consumption and high reliability and accuracy. The HDC3020 and HDC3020-Q1 Sensors have built-in protection of sensing elements and will allow to create more reliable industrial and automotive systems that withstand potential damage caused by moisture, and react as needed to changing water vapor conditions over time. These Sensors preserve data integrity under stress conditions and provide integrated correction to adapt to drift caused by natural aging, environmental stress or interactions with contaminants. Moreover, an automatic measurement mode enables humidity sensing at regular intervals to capture data while the rest of the system sleeps, further preserving system battery life in applications such as cold-chain data loggers, wirelessly connected environmental sensors such as air-quality monitors, smart home or wireless sensor nodes in buildings; or IP network cameras.

The HDC3020 and HDC3020-Q1 achieve lower drift in extreme conditions with less than 0.21% RH accuracy drift per year and less than 5% RH drift from temperature and humidity stress which extend system reliability. The sensors provide the highest accuracy across the full supply voltage of 1.62 V to 5.5 V and the widest temperature and humidity range at ±1.5% RH. The ultra-low power consumption enables low-power operation both while a system is actively running and in sleep mode.

Additionally, the HDC3020 and HDC3020-Q1 are available in several pin-to-pin compatible package cover options, such as removable polyimide tape and permanent IP67-rated filter covers. The covers provide ingress protection against dust and moisture for the devices during assembly and system lifetimes, and help maintain accuracy when the sensor is exposed to contaminants.

Features of the Humidity Sensors

Relative Humidity Operating Range: 0% to 100%
Relative Humidity Accuracy: ±1.5% typical
Drift Correction: reduces offset to return device to within accuracy specification
Long-term drift: 0.21%RH/yr
Condensation protection with integrated heater
Temperature Sensor Operating Range: -40°C to 125°C
Temperature Sensor Accuracy: ±0.1°C typical
NIST traceability: Relative humidity & temperature
Low power: average current 0.7 µA
I2C interface compatibility up to 1-Mhz speeds
Supply voltage: 1.62 V to 5.50 V
Available auto measurement mode
Programmable interrupts
Programmable measurement calibration