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Motion Sensors For Activity Trackers And Monitors

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Motion Sensors For Activity Trackers And Monitors

Innovative, smart motion sensors from STMicroelectronics are designed to track movement more accurately and continuously with minimal impact on device battery life by performing various motion-related calculations efficiently on-chip instead of using the main system processor. The new sensors include the LIS2DS12 3-axis “pico” accelerometer, LSM6DSL/M 6-axis inertial module, and the new LSM303AH eCompass.

These sensors come with pre-embedded algorithms such as  high-precision pedometer, step detection, step counting, and significant motion and tilt detection to speed development of new apps on devices such as fitness bands, medical monitors, personal navigation and Internet of Things (IoT) nodes, in addition to smartphones and wearable devices.

ST’s smart motion sensors are already integrated in several smartphones to enable WeRun, a new feature of the WeChat messaging app used by more than 90% of people in China’s largest cities.

“WeRun turns physical activity into a social pursuit, helping smartphone and wearable device users stay healthy,” commented Andrea Onetti, Group Vice President and General Manager, MEMS Sensors Division, STMicroelectronics. “ST’s smart motion sensors enable WeRun to track movements continuously, never missing a step, while preserving battery energy to power the device for longer. This enhances usability and helps attract more subscribers.”

The LSM303AH eCompass combines an accelerometer with a magnetic sensor which is claimed to more than double the heading accuracy of other eCompass or pure magnetometer solutions tested at the same geographical lattitudes. The sensor ensures extremely precise location awareness by dead reckoning where there is no GPS signal, such as in offices, car parks, or shopping malls.

Further, the firm has made available an advanced software to simplify user calibration of the temperature drift and the magnetic sensor.

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The sensors help optimize energy efficiency and performance with selectable power modes and resolution. Additional features include an embedded FIFO, built-in self-test, integrated temperature sensor, and programmable interrupts for conditions such as freefall.

The LIS2DS12, LSM6DSL/M, and LSM303AH smart sensors are in production now. The LSM303AH in a 2mm x 2mm x 1mm 12-lead LGA package is priced from $1.63 for orders of 1,000 devices.

For further information, view the full Press release.

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