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Analog Devices Launches iMEMS Gyroscope for Automotive Applications

The Norwood, Massachusetts-headquartered Analog Devices has developed the ADXRS800 iMEMS gyroscope for use in applications such as rollover detection, automotive electronic stability control and pitch detection. The iMEMS gyroscope features a differential quad-beam architecture that is patented and the gyroscope is designed to reduce the impact of linear vibration and shock.

The ADXRS800 is a stable, automotive-grade gyro, which is vibration-resistant. An electro-mechanical self-test attribute allows for reliable gyro output signal.

The Vice President-Automotive at Analog Devices, Thomas Wessel explained that accurate inertial signals are vital to a stability control system especially in events when harsh shocks and vibrations occur, and that the vibration immunity of the ADXRS800 iMEMS gyroscope proves beneficial for critical auto applications. Wessel added that the continuous self-test architecture is also vital in achieving fail-safe system performances.

The self-test feature in the ADXRS800 detects system failure by simplifying algorithms, thus allowing designers to rapidly incorporate fault detection in system designs. The stability of the electro-mechanical system is tested by applying an electrostatic force of high frequency to the structure, thus enabling differentiation from the base bandfs real-rate stimulus to be filtered without interfering with the sensor output.

Key features of the ADXRS800 iMEMS gyroscope includes high resolution of 80 LSB/°/s, measurement range of ±300°/s, noise-rate density of 0.02°/sec/ÖRHz at 105°C and vibration rectification of 0.0002 °/sec/g2. Other features include a vertical-mount optional ceramic package that allows for three-axis sensing and an internal temperature compensation system.

The ADXRS800 iMEMS gyroscope is available in a SMT-compatible vertical mount package and a SOIC-16 cavity plastic. The gyroscope has been designed for operation in temperatures ranging from -40°C to 125°C.


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