MEMS Chip Combines Accelerometer with High-Accuracy Temperature Sensor for Superior PrecisionGeneva / 23 Apr 2019
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.
In addition to enhanced temperature compensation, leveraging the sensor’s superior accuracy, the accelerometer benefits from unprecedented flexibility with 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% lower package height than other combination sensors, at just 0.7mm, the LIS2DTW12 allows extra battery capacity for longer runtimes. Power-saving features let devices go even further between charges, and 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. ST’s advanced 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 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.
For more information please go to www.st.com/lis2dtw12-pr
You can also read our blog post at https://blog.st.com/lis2dtw12-accelerometer-thermometer/
The STM32L5 is based on Arm® Cortex-M33 and TrustZone® technology combined with STMicroelectronics security implementation. On your STM32L562E-DK discovery board, TrustZone is disabled (factory setting) and you can develop as on any other STM32 device. This video shows how to enable TrustZone on STM32L562E-DK discovery using STM32CubeProgrammer and create, compile and debug or run a new project with STM32CubeIDE. It also shows how to open an example project delivered in STM32CubeL5 MCU Package, modify, compile and debug or run it. For further information, you can refer to AN5394 and AN5424 application notes.
Security has emerged as one of the 3 key areas that developers of embedded and IoT applications are thriving to improve. The STM32L5 microcontroller series is the solution and provide a new optimal balance between performance, power and security.
Download the free TouchGFX GUI software, try the Out-of-the-Box supported STM32H7B3I-DK, and eliminate the need for external ram, when developing your next embedded UI.