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Motion Sensors (MEMS)

STMicroelectronics is today present on the market with a huge portfolio of sensitive, compact and cost-effective motion sensors based on MEMS (micro electro-mechanical systems).
MEMS technology exploits the mechanical properties of silicon to create movable structures that, in the case of MEMS-based motion sensors, are able to sense motion (acceleration or vibration) in distinct directions.

The two key elements of a micro electro-mechanical system are:

  • MEMS sensor, the silicon mechanical element which senses the motion
  • interface chip, the IC which converts the motion measured by the sensor into an analog or digital signal

For cost and flexibility, ST has chosen to build solutions where the mechanical sensor and the interface chip are housed in the same standard IC package.

ST's family of MEMS-based motion sensors includes linear accelerometers able to sense linear acceleration or vibration in one, two or even three linear axes.
 
Motion Sensors (MEMS) Families
 
Applications

MEMS-based sensors are ideal for a wide array of applications in consumer, communication, automotive and industrial markets.

The consumer market has been a key driver for MEMS technology success. For example, in a mobile phone, MP3/MP4 player or PDA, these sensors offer a new intuitive motion-based approach to navigation within and between pages. In game controllers, MEMS sensors allow the player to play just moving the controller/pad; the sensor determines the motion rather than the player providing game input by pushing buttons. Another typical application in the consumer market is HDD protection; in the case of free fall, a MEMS sensor informs the hard disk control to park the head, saving the data prior to the shock when reaching the ground.

Another interesting driver market for MEMS-based sensors is the industrial one where MEMS sensors can be used for vibration monitoring and control. For example, vibrations can degrade dishwasher and washing machine performance and reduce the lifetime itself. MEMS sensors can be used to measure the vibrations and, as a result, identify potential machine problems prior to equipment failure, so allowing preventive maintenance to be implemented.

 
New Products
LIS244ALH: 2-axis, high performance ± 2g/± 6g ultra-compact accelerometer
LIS344ALH: 3-axis, high performance ± 2g/± 6g ultra-compact accelerometer
LIS344AL: 3-axis, ± 3.5g ultra-compact linear accelerometer
LIS331DL: 3-axis, ± 2g/± 8g smart motion sensor with digital output
LIS331AL: 3-axis, ± 2g motion sensor with analog output
LIS244AL: 2-axis - ± 2g ultra-compact linear accelerometer
LIS202DL: 2-axis - ± 2g/± 8g smart digital output "piccolo" accelerometer
 
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Related Information
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