Tri-axis MEMS accelerometer includes precision thermometer

Tri-axis MEMS accelerometer includes precision thermometer

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STMicroelectronics has introduced a tri-axis MEMS accelerometer with a precision thermometer, local processing and multiple user-configurable modes.
By Peter Clarke


The LIS2DTW12 combines a 3-axis MEMS 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 is 0.8°.

In addition to enhanced temperature compensation, leveraging the sensor’s superior accuracy, the accelerometer offers 65 different user modes. It has a user-selectable full-scale range up to ±16g and measures acceleration with output data rates from 1.6Hz to 1600Hz.

Power-saving features include a 50nA power-down mode, multiple operating modes down to less than 1 microamp, a dedicated internal engine for processing accelerometer signals, and a 32-level FIFO.

The LIS2DTW12 provides 16-bit accelerometer data and 12-bit temperature data through an I2C/SPI port. 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. A self-test capability is also built-in to verify the sensor is functioning correctly.

The LIS2DTW12 is specified from -40°C to +85°C and available in a 2.0mm by 2.0mm by 0.7mm LGA-12 plastic land grid array package, priced from $0.99 for orders of 1000 pieces.

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