High-performance IMU targets virtual and augmented reality applications
The BMI085 IMU is aimed at demanding virtual reality (VR) and augmented reality (AR) applications as well as other applications, such as navigation, body/human motion tracking and high-end gaming. The combination of an extremely low-drift gyroscope with a low-noise accelerometer allows for the ultra-precise instantaneous detection of head movements, reducing time lag to an almost imperceptible minimum and significantly reducing the unpleasant motion sickness effect in end applications. The IMU delivers a low motion-to-photon latency of less than 3ms and achieves near perfect stability in environments with high temperature fluctuations as often encountered in continuous HMD (head-mounted display) or AR headset scenarios. The sensor’s accelerometer has rock-solid temperature stability, with a low temperature coefficient offset (TCO) of typically less than 0.2 mg/K and temperature coefficient sensitivity (TCS) of only 0.002 %/K. Bias instability of the gyroscope is typically below 2 °/h. A closed-loop analog-to-digital conversion mechanism ensures low drift characteristics even in high-fluctuation temperature environments. The accelerometer achieves a noise density of under 120 μg/√Hz and the IMU’s accuracy is further boosted by data synchronization of the accelerometer and gyroscope. The BMI085 comes in a 3.0×4.5×0.95mm³ package and is pin-to-pin compatible with Bosch’s BMI055 IMU, making design migration to the new BMI085 extremely smooth and effortless.
Bosch Sensortec – www.bosch-sensortec.com
