November 2011:- For automotive electronic stability control, rollover detection, and pitch detection applications, Analog Devices Inc. (ADI) offers the ADXRS800 iMEMS Gyroscope, featuring a patented differential quad-beam architecture designed to minimize the influence of linear shock and vibration. Qualified for automotive safety applications, the ADXRS800 is the most stable, vibration-immune automotive-grade gyro available while a continuous electro-mechanical self-test feature ensures the integrity of the gyro output signal.

Fail-Safe Automotive Gyroscope has Shock and Vibration ImmunityA stability control system needs accurate inertial signals at all times, especially when harsh vibrations and shocks are present, said Thomas Wessel, Automotive vice president, Analog Devices. Safety critical auto applications like this benefit greatly from the ADXRS800’s vibration immunity. The continuous self-test feature is also key to realizing fail-safe system performance according to the highest industry standards. The innovations that this part delivers will make cars safer.

Unlike alternative MEMS gyros, the ADXRS800’s unique architecture enables very accurate performance in exceedingly harsh automotive environments without the need for complex and costly system-level counter measures. Sensitivity to linear acceleration is specified at only 0.03 °/sec/g, vibration rectification is only 0.0002°/sec/g2, noise-rate density is 0.02°/sec/√Hz at +105°C and null offset variation is 3°/s maximum over temperature and product life. Further simplifying the system design, the gyro delivers better offset stability compared to alternatives without the need for calibration. What’s more, power consumption is only 6 milliamps under typical conditions. The new gyro is available in a cavity plastic SOIC-16 (Z-axis) and a SMT-compatible vertical mount package (X-axis) and is capable of operating across an extended temperature range of -40 °C to 125 °C.

ADXRS800 iMEMS Gyroscope Key Features

  • The unique differential quad sensor technology provides high vibration and shock immunity over a wide frequency range and allows for reliable and stable readings in harsh environments.
  • Offers a measurement range of ±300°/s at high resolution of 80 LSB/°/s
  • Power consumption is only 6 milliamps under typical conditions
  • Excellent null offset stability of 3°/s maximum over temperature and product life
  • Low noise with a noise-rate density specification of 0.02°/sec/√Hz at +105°C
  • Qualified for automotive applications