STMicroelectronics LIS2DTW12 MEMS chip

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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 standalone standard temperature sensors.

In addition to enhanced temperature compensation, the accelerometer benefits from flexibility, with 65 different user modes that enable developers to optimise 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 1.6 to 1600 Hz.

With a low package height of just 0.7 mm, the device allows extra battery capacity for long runtimes. Power-saving features let devices go even further between charges, and include a 50 nA power-down mode, multiple operating modes down to less than 1 µA, a dedicated internal engine for processing accelerometer signals and a large 32-level FIFO to reduce intervention from the main controller.

The product 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. ST’s self-test capability is also built in to verify the sensor is functioning correctly.

The device is specified from -40 to +85°C and available now in the ultrathin 2 x 2 x 0.7 mm LGA-12 plastic land grid array package.

For more information: www.st.com/lis2dtw12-pr.