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MEMS gyros fit for gesture-controlled gaming apps

Posted: 09 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MEMS? gyroscope? motion sensor?

ST MEMS gyroscopes

STMicroelectronics expands its motion-sensor portfolio with 13 new single- and two-axis gyroscopes. Offering a 50 percent shrink in volume over previous ST devices, reduced power consumption and an aggressive price, the angular-motion sensors open the way to a wide range of innovative consumer applications. They are suited for gesture-controlled gaming and pointing devices, image stabilization in digital video or still cameras, and assisted GPS navigation.

ST's newest single-axis (yaw) and two-axis (pitch-and-roll, pitch-and-yaw) MEMS gyroscopes fit in miniature packages of 3mm x 5mm x 1mm and 4mm x 5mm x 1mm, respectively, addressing the size constraints of today's and tomorrow's consumer applications. Power consumption is another key factor, especially in battery-operated devices. Therefore, ST's gyroscopes include a power-down mode (when the entire device is switched off) and a sleep mode, in which part of the circuitry is turned off to significantly reduce power consumption while allowing very fast turn-on time and smart power cycling.

ST's new gyroscopes boast excellent stability over time and a wide temperature range (down to 0.02dps/C), eliminating the need for additional temperature compensation in the application. Measurement precision is ensured with a negligible level of output noise (down to 0.01dps/sqrt(Hz), and wide bandwidth up to 560Hz, ensuring high accuracy and repeatability.

ST's MEMS gyroscope family offers a wide full-scale range, from 30dps to 6,000dps, covering a broad spectrum of applications that require high resolution and stability over time and temperature.

The high-performance MEMS gyroscopes are resistant to mechanical stress and come with improved built-in self-test capability that allows the customer to verify the functioning of the sensor after it has been assembled, without the need to move the board during testing.

"Today, the gyroscope market for consumer applications is around $200 million and it is dominated by non-MEMS companies," said Benedetto Vigna, general manager of ST's MEMS and health care division. "ST's third-generation gyroscopes benefit from the same winning attributes that have helped us conquer the accelerometer market: proven manufacturing technology and robust design. These features will help us trigger the 'consumerization wave' for gyroscopes, and our in-house supply-chain management will enable ST to meet the customer demand."

ST's new single- and two-axis MEMS gyroscopes are now in high-volume production with unit pricing of $2.1 for the 2-axis gyro and $1.8 for the single-axis gyro, in quantities greater than fifty thousand pieces.

For application notes on gyroscopes click here.

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