Gyros handle harsh vibrations

25 May 2011 Analogue, Mixed Signal, LSI

The ADXRS642, ADXRS646 and ADXRS649 incorporate advanced, differential quad-sensor technology which rejects the influence of linear acceleration and vibration to enable the devices to offer highly accurate and reliable rate sensing even where severe shock and vibration are present.

For applications where ultra-wide measurement ranges are needed, the ADXRS649 also offers very fast rotation sensing with ±20 000°/sec and 3 millisecond startup time for quick power cycling. This measurement range is extendable 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. Coupled with its low-G sensitivity of 0,015°/s/G and vibration rectification of 0,0001°/s/G², it is well suited for high-performance heading measurement and platform stabilisation.

The ADXRS642 is also rated at ±250°/s and brings improved vibration and shock immunity performance to existing iMEMS gyroscope users in a convenient drop-in upgrade.

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