TI Announces New Humidity Sensors

By Tiera Oliver

Associate Editor

Embedded Computing Design

July 05, 2021


TI Announces New Humidity Sensors

Texas Instruments (TI) introduced their new humidity sensors designed to provide improved reliability, accuracy, and low power consumption – along with built-in protection of sensing elements.

Per the company, the HDC3020 and HDC3020-Q1 will allow engineers to create reliable industrial and automotive systems that withstand potential damage caused by moisture, and react as needed to changing water vapor conditions over time.

Offering relative humidity measurement accuracy with reduced long-term error, the HDC3020 and HDC3020-Q1 preserve data integrity under stress conditions and provide integrated correction to adapt to drift caused by natural aging, environmental stress, or interactions with contaminants.

The HDC3020 and HDC3020-Q1 are designed to achieve less than 0.21% RH accuracy drift per year, and less than 5% RH drift from temperature and humidity stress (tested up to 85% RH and 85°C). This enables longer system lifetimes, eliminating the need to frequently replace or recalibrate the sensor.

When exposed to stress or contaminants, the sensors also provide a second line of defense, where even a small accuracy drift from the sensor’s time-zero specification can be removed using integrated drift correction technology. Low drift is especially important in long-life applications, because it enables ideal performance and reliability over time.

The HDC3020 and HDC3020-Q1 provide the high accuracy – verified with a procedure traceable to the National Institute of Standards and Technology – across the full supply voltage of 1.62 V to 5.5 V and a wide temperature and humidity range at ±1.5% RH. Per the company, this accuracy enables more precise control of a system, increasing efficiency by ensuring that the system only runs when necessary.

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.

Ultra-low power consumption (nanoampere) across a wide supply range from 1.62 V to 5.5 V enables low-power operation both while a system is actively running and in sleep mode. 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.

Preproduction versions of the HDC3020 and HDC3020-Q1 are available on TI.com in 8-pin leadless plastic small-outline packages. Pricing starts at US$1.65 in 1,000-unit quantities.

For more information, visit: TI.com

Tiera Oliver, Associate Editor for Embedded Computing Design, is responsible for web content edits, product news, and constructing stories. She also assists with newsletter updates as well as contributing and editing content for ECD podcasts and the ECD YouTube channel. Before working at ECD, Tiera graduated from Northern Arizona University where she received her B.S. in journalism and political science and worked as a news reporter for the university’s student led newspaper, The Lumberjack.

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