STMicroelectronics Introduces Accelerometer with Temperature Sensor for IoT Nodes

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The accelerometer is equipped with power-saving features that allow the devices go even further between charges

STMicroelectronics, a leading global electronics and semiconductor manufacturer, announced that it has combined a MEMS 3-axis accelerometer and a temperature sensor on a single die for usage in space-constrained and battery-sensitive detectors like wearables, shipping trackers and Internet of Things (IoT) endpoints.

The device (LIS2DTW12) has an embedded 0.8°C temperature sensor that provides precision as compared to standalone standard temperature sensors, the company said in a statement.

In addition, the accelerometer benefits from extraordinary flexibility with 65 different user modes that allow developers to reduce power consumption and noise to meet the specific requirements of application. The accelerometer has user-selectable full-scale range of up to ±16g. It can measure acceleration with output data rates between 1.6Hz and 1600Hz.

Key features and functions

The new device has a package height of just 0.7mm, which is about 30 per cent lower than other combination sensors, enabling extra battery capacity for longer runtimes. It is equipped with power-saving features that allow the devices go even further between charges. In addition, the device includes a 50nA power-down mode, an internal engine for processing accelerometer signals, multiple operating modes down to less than 1µA and a 32-level FIFO to reduce intervention from the main controller.

The new device offers 16-bit accelerometer data and 12-bit temperature data by way of a high-speed I2C/SPI port and enables single data conversion on demand. The device has a dedicated motion engine that performs free-fall and wakeup detection, activity/inactivity, single/double-tap recognition, portrait/landscape detection, stationary/motion detection, and 6D/4D orientation.

It is also built-in with ST’s self-test capability to verify the sensor is functioning correctly. This allows the user to test the sensor functioning in the final application.

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