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Three-axis gyro ups accuracy in consumer apps

Posted: 22 Feb 2010 ?? ?Print Version ?Bookmark and Share

Keywords:gyroscope? sensor? MEMS?

L3G4200D MEMS gyroscope

STMicroelectronics has unveiled a three-axis digital gyroscope that employs a single sensing structure for motion measurement along all three orthogonal axes. The innovative design approach significantly increases accuracy and reliability in motion-controlled consumer applications, paving the way to previously unseen levels of realism.

Whereas existing three-axis gyroscope solutions rely on two or three independent sensing structures, even if mounted on the same silicon substrate, ST's concept of sensing all three axes with a single driving mass eliminates any interference between the axes that inherently affects and degrades the output signal. Furthermore, the innovative architecture has allowed ST engineers to house the sensor and the ASIC interface inside an ultra-small 4mm x 4mm x 1mm package, addressing the size constraints of today's and tomorrow's consumer applications.

"Over the past 18 months, ST has announced a new gyroscope almost every month, following an aggressive roadmap of increasing performance and reliability, coupled with dramatic reductions in size," said Benedetto Vigna, group VP and general manager of the MEMS, sensors and high performance analog division, ST. "Our innovative three-axis digital gyroscope represents a true leap forward in ST-led consumerization of MEMS sensors, enabling major improvements in ever more popular motion-sensing user interfaces inside game controllers and mobile phones."

ST's three-axis digital gyroscope offers a wide set of user-programmable full-scale ranges from 250dps up to 2000dps, with the low full-scale values for high accuracy of slow-motion sensing and the high range to detect and measure very fast gestures and movements. The device provides a 16bit data output, together with additional embedded digital features, such as configurable low- and high-pass filters, and boasts excellent output stability over time and temperature.

The L3G4200D three-axis MEMS gyroscope with digital output has been designed and produced using the same manufacturing-process technology that ST has already successfully applied to more than 600 million motion sensors sold in the market. Volume production is scheduled for the end of Q2 10 and the unit price is $2.9 in quantities greater than 200,000 pieces.





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