Ultra-low-power IMU extends system battery life

20th August 2019
Mick Elliott

The smart Inertial Measurement Unit (IMU) BMI270 from Bosch Sensortec scores with increased system battery life and an improved accelerometer. Optimised for wearable and hearable applications, the BMI270 is available from Rutronik UK.

The newest member of the BMI260 family of IMUs includes intuitive gesture, context and activity recognition with an integrated plug-and-play step counter.

The IMU handles these functions independently of the main system processor, thus significantly extends system battery life.

Powerful and accurate gesture and activity-recognition features run in the ultra-low power domain, with current consumption of just 30µA.

This reduces power consumption and enables extended battery charging intervals.

The BMI270 measures 2.5 x 3.0 x 0.8 mm3, and is pin-to-pin compatible with the BMI160 and BMI260.

It is well suited for many types of wearable devices, such as smart clothes, smart shoes, smart glasses, wrist and ankle bands as well as hearables. 

Enabled by the new Bosch MEMS process technology, the IMU features a strongly improved accelerometer performance.

It saves OEMs valuable time and costs during testing and manufacturing, and it is available in two application-specific versions, A and C.

The A version detects wrist gestures (flick in/out, pivot up/push, arm up/down, and jiggle) for intuitive control of e.g. smart watches and is designed for Wear OS by GoogleTM.

The C version has advanced features for recognising context / activity change (standing, walking or being in a vehicle).

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