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MEMS sensors extend battery life of devices hosting always-on activity-tracking apps

January 4, 2017 By Aimee Kalnoskas

STMicroelectronics has introduced three new sensors, the LIS2DS12 3-axis “pico” accelerometer, LSM6DSL/M 6-axis inertial module, and the new LSM303AH eCompass help track movement continuously with minimal impact on device battery life by performing various motion-related calculations efficiently on-chip instead of using the main system processor. Pre-embedded algorithms that include high-precision pedometer, step detection, step counting, and significant motion and tilt detection effectively reduce engineering effort and accelerate time to market for imaginative 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 latest sensor device with the on-board pedometer suiting the WeRun app, the LSM303AH eCompass combines an accelerometer with a magnetic sensor that more than doubles the heading accuracy of other eCompass or pure magnetometer solutions tested at the same geographical latitudes. Combined with the continuous accurate step monitoring, this ensures extremely precise location awareness by dead reckoning where there is no GPS signal, such as in offices, car parks, or shopping malls. In addition, ST has engineered advanced software that simplifies user calibration of the temperature drift and the magnetic sensor.

ST’s smart sensors also implement selectable power modes and resolution that help optimize energy efficiency and performance. Additional features that simplify system design 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. Please contact your local ST sales office for more details.

Filed Under: Analog ICs, MEMS & Sensors Tagged With: STMicroelectronics

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