STMicroelectronics LPS22DF, LPS28DFW, LIS2DU12 and LSM6DSV16X MEMS sensors

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STMicroelectronics introduces its third generation of MEMS sensors, suitable for consumer mobiles, smart industries, health care and retail. The sensors are designed to deliver high accuracy for product features such as activity detection, indoor navigation and precision industrial sensing, while also keeping battery demand low for long runtimes.

Extra features, to be included in selected variants, include ST’s machine-learning core (MLC) and electrostatic sensing. The MLC brings adaptive, machine-learning capabilities to edge applications that operate at very low power. The charge-variation (QVAR) sensing channel monitors changes in electrostatic charge, either through contact with the body in a smartwatch or fitness band or by non-contact sensing (radar). MEMS sensors with QVAR can enhance user-interface controls, to enable seamless interactions or to simplify detection of moisture and condensation. Radar-mode applications include human-presence detection, activity monitoring and people counting.

The LPS22DF and waterproof LPS28DFW barometric pressure sensors operate from 1.7 µA and have absolute pressure accuracy of 0.5 hPa. The LPS28DFW has dual full-scale capability, enabling accurate vertical position both under and out of water. The full-scale range is selectable up to 1260 or 4060 hPa, equivalent to water pressure at a depth of about 30 m. The sensors enhance altimeter and barometer performance in portable devices and wearables including sport watches. Typical industrial applications include equipment for weather monitoring and water-depth sensing.

The LIS2DU12 3-axis accelerometer has been designed to build ultralow-power architecture with active antialiasing and low current consumption. The product consumes only 3.5 µA at 100 Hz output data rate (ODR) and features an I³C interface. Measuring 2 x 2 x 0.74 mm, it is suitable for wearable devices, hearing aids, true wireless stereo (TWS), wireless sensor nodes and any application where system optimisation is essential.

The LSM6DSV16X 6-axis iNEMO inertial module contains QVAR electrostatic sensing as well as the MLC and a finite state machine (FSM) that enhance response and save power. The operating current can be as little as 12 µA. The FSM enables adaptive self-configuration (ASC). With ASC, the device understands the context and reconfigures itself without waking up the system, gaining extra power savings.

For more information: www.st.com/mems-sensors.