STMicroelectronics Chip Combines Accelerometer and Temperature Sensor For Space-Constrained, Battery-Driven Apps

May 1, 2019 Alix Paultre

The STMicroelectronics LIS2DTW12 combines a MEMS 3-axis accelerometer and a temperature sensor on a single die, for use in space-constrained and battery-sensitive detectors such as shipping trackers, wearables, and IoT endpoints. The sensing accuracy of 0.8°C offers precision comparable with stand-alone standard temperature sensors.

The accelerometer offers 65 different user modes that enable developers to optimize power consumption and noise to meet application-specific requirements. It has user-selectable full-scale range up to ±16g and measures acceleration with output data rates from 1.6Hz to 1600Hz.

With about 30 percent lower package height than other combination sensors, at just 0.7mm, the LIS2DTW12 allows extra battery capacity for longer runtimes. Power-saving features include a 50nA power-down mode, multiple operating modes down to less than 1µA, a dedicated internal engine for processing accelerometer signals, and a large 32-level FIFO to reduce intervention from the main controller.

The LIS2DTW12 provides 16-bit accelerometer data and 12-bit temperature data through a high-speed I2C/SPI port, and allows single data conversion on demand. The motion engine performs free-fall and wakeup detection, single/double-tap recognition, activity/inactivity, stationary/motion detection, portrait/landscape detection, and 6D/4D orientation.

The LIS2DTW12 is specified from -40°C to +85°C and available now in the ultra-thin 2.0mm x 2.0mm x 0.7mm LGA-12 plastic land grid array package, priced from $0.99 for orders of 1000 pieces. A dedicated adapter board, STEVAL-MKI190V1, is ready to use with the STEVAL-MKI109V3 microcontroller motherboard to connect to a PC running the Unico development GUI or a custom application for inspecting the sensor data.

Learn more at www.st.com.

Previous Article
Windows 10 Cyber Hygiene Guide Published by Center for Internet Security

The Guide offers free, real-world security tips for implementing baseline security protections on computers...

Next Article
Paragon Software Group Launches APFS SDK Community Edition

The technology can be integrated into other solutions and applications, and grants instant read access to A...