STM sensing hardware uses 3 MEMS for 10 DoF

May 6, 2011 – PRNewswire — STMicroelectronics (NYSE: STM), micro electromechanical systems (MEMS) supplier, launched a complete hardware solution for advanced sensing applications with 10 degrees of freedom (DoF). A set of 3 thin, high-performance MEMS sensors provides accurate and comprehensive information on linear, angular, and magnetic motion together with altitude readings, enabling enhanced navigation and smarter user interface in mobile phones and other portable consumer devices.

An emerging new class of mobile consumer applications, such as location-based services and pedestrian dead-reckoning for indoor and multi-floor navigation, require rather complex sensing capabilities. By using three ST MEMS sensors — a geo-magnetic module, a gyroscope, and a pressure sensor — a consumer device can have a complete indication of its linear acceleration, angular velocity, earth gravity, heading and altitude. With this information, mobile users will be able to identify their direction and precise location in all three dimensions everywhere they go, including in places with no or low GPS signal: inside buildings in urban canyons, or in mountainous and forested terrain.

Facilitating the fusion of complex motion-sensor data in smart consumer devices, ST has also recently introduced an advanced filtering and predictive software engine, which integrates the outputs from 3-axis accelerometers, gyroscopes and magnetic sensors. Fusing these sensors’ data through sophisticated algorithms, the iNEMO Engine delivers more accurate and reliable sensor performance.

"Multi-sensor capabilities enhance the mobile user experience with previously unseen realism and accuracy in next-generation motion- and location-based applications," said Benedetto Vigna, group VP and GM of ST’s MEMS, Sensors and High Performance Analog Division.

Designed and produced using the same micromachining technology process that the company applies to its more than 1.2 billion sensors, ST’s MEMS chips boast ultra-small size and minimized current consumption coupled with superior accuracy and reliability. The three-chip 10-DoF sensor solution comprises the following components:

  • The LSM303DLHC geo-magnetic module integrates high-resolution, three-axis sensing of linear and magnetic motion in a 3 x 5 x 1mm package, with operating current consumption as low as 110 microamps. The device delivers extremely accurate output across full-scale extended ranges up to +16g (linear acceleration) and +8 Gauss (magnetic field), with excellent stability over time and temperature.  In addition to that, it comes with a host of advanced features, including 4D/6D orientation detection and two programmable interrupt signals that enable immediate notification of motion detection, free fall and other conditions.
  • Housed inside a 4 x 4 x 1mm package, the L3G4200D 3-axis digital gyroscope provides state-of–the-art performance in terms of output accuracy and stability over temperature and time. The device couples a 16-bit data output with a wide set of user-programmable full-scale ranges from +250dps up to +2000dps. An embedded FIFO (first-in first-out) memory block removes the need for continuous communication of between the sensor and the host processor, decreasing dramatically the overall power consumption.
  • ST’s soon-to-be-announced silicon pressure sensor uses an innovative technology to provide extremely high resolution measurements of pressure — and therefore also of altitude — in a 3 x 3 x 1mm package. The device has an operating pressure range of 260-1260 millibars, corresponding to the atmospheric pressures between -700 and +10000m relative to sea level, and can detect height variations as small as 0.3m.

ST’s 10-DoF sensor solution is now available for evaluation, with mass production scheduled for the end of Q3 2011.

STMicroelectronics creates innovative semiconductor solutions for multimedia convergence and power applications. For further information on ST’s MEMS solutions, go to

Follow Small Times on by clicking Or join our Facebook group


Easily post a comment below using your Linkedin, Twitter, Google or Facebook account. Comments won't automatically be posted to your social media accounts unless you select to share.