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Date: 6th Mar 2011

MEMS gyro with rotation sensing rate of ±50,000°/sec

Analog Devices, Inc. has introduced three new low-power gyroscopes for angular rate (rotational) sensing in harsh environments. The ADXRS642, ADXRS646, and ADXRS649 are designed to reject the influence of linear acceleration and vibration to deliver better accuracy and reliability even in the presence of severe shock and vibration.

"These new MEMS gyros have linear acceleration sensitivities as low as 0.015°/sec/g as compared to 0.1°/sec/g offered by the leading alternative MEMS gyros," said Wayne Meyer, Marketing and Applications Manager, MEMS/Sensors Technology Group, Analog Devices, Inc. "The ADXRS64x series also offers much faster start-up times, as fast as 3 milliseconds, and 10 times lower power consumption at 3.5 mA compared to other MEMS gyros that consume as much as 60 mA."

ADXRS649 are designed to offer high rate of rotation sensing available with ±20,000°/sec and fast 3 millisecond (ms) start-up time for quick power cycling. This measurement range can be extended to ±50,000°/sec with the addition of an external resistor. The ADXRS646 gyro offers a measurement range of ±250°/s, 1 kHz bandwidth, and 8°/hr drift with low broadband noise. Very good low-g sensitivity of 0.015°/s/g and vibration rectification of 0.0001°/s/g2 makes ADXRS646 suitable for high-performance heading measurement and platform stabilization. The ADXRS642 is also rated at ±250°/s and brings improved vibration and shock immunity performance to existing ADI iMEMS gyroscope users in a convenient drop-in upgrade.

"These new gyros bring together ADI's innovative quad-sensor technology, the same technology that is found in the ADXRS45x iMEMS gyro series, with the same pin-out and compact BGA package found in the very popular ADXRS62x series of iMEMS gyros," said Mark Martin, vice president, MEMS/Sensors Technology Group, Analog Devices, Inc. "Design engineers now have a convenient migration path to upgrade their designs for in-production products and take advantage of the best gyro performance available."

The other key features include:

Fast 3 millisecond start-up time for quick power cycling.
Low-drift performance of 8°/hr (ADXRS646) enables high heading accuracy over time.
Pin-to-pin compatibility with the ADXRS62x series provides a convenient migration path and an easy drop-in upgrade.
Low-power consumption of 3.5 mA addresses lower-power demands of portable instruments.
-40° C to +105° C operation is suitable for most industrial and other harsh environments.

Availability, package and price table:

Product Availability Price Each Per 1,000 Packaging
ADXRS642 Samples and EVAL boards available now
Full production: April 2011
$41.85 7 mm x 7 mm x 3 mm
BGA chip-scale package
ADXRS646 Samples and EVAL boards available now
Full production: July 2011
$75.39 7 mm x 7 mm x 3 mm
BGA chip-scale package
ADXRS649 EVAL boards available now
Full production now
$58.59 7 mm x 7 mm x 3 mm
BGA chip-scale package

 

For more info visit www.analog.com

 
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