Basic Description

The device is a highly integrated, low power inertial measurement unit (IMU) that combines precise acceleration and angular rate (gyroscopic) measurement with intelligent on-chip motion-triggered interrupt features.

The device integrates

 16 bit digital, triaxial accelerometer with ±2g/±4g/±8g/±16g range

 16 bit digital, triaxial gyroscope with ±125dps/±250dps/±500dps/±1000dps/±2000dps range

in a compact standard size LGA mold package, 14 pins, footprint 2.5x3.0mm², height 0.83mm

Key features

 Output data rates (ODR): 25 Hz … 6.4 kHz (gyroscope) and 0.78 Hz … 1.6 kHz (accelerometer)

 Programmable low-pass filter (accelerometer ∣ gyroscope): bandwidth 5.5 ∣ 11 … 740 ∣ 751 Hz

 Wide power supply range: Analog VDD 1.71V … 3.6V and independent VDDIO 1.2V…3.6V

 Low current consumption: typ. 685 μA (in full ODR and aliasing free operation)

 Performance mode for gyroscope to minimize noise level: typ. < 7 mdps Hz.

 Built-in power management unit (PMU) for advanced power management and low power modes

 Rapid startup time: 2 ms for gyroscope (in fast start mode) and 2 ms for accelerometer

 Freely configurable secondary digital interface

 I²C (Fm+) master interface hub for 1 I2C AUX sensor (e.g. ext. magnetometer, pressure)

o data synchronized to IMU

 10 MHz slave SPI (4-wire, 3-wire) for high speed, calibration free OIS / Dual OIS (SPI) applications

o Up to 6.4 kHz ODR, control register access and down to 680 μs group delay

o Connectible latency optimized low pass-filters with programmable cut-off frequencies

 2 KB on-chip FIFO buffer for accelerometer, gyroscope, timestamps, and AUX sensor data

 Fast offset error compensation for accelerometer and gyroscope

 Fast sensitivity error compensation for gyroscope (CRT, reducing the error down to typ. 0.4 %)

 HW synchronization of accelerometer, gyroscope, and AUX sensor (< 1 μs)

 Sensortime stamps for accurate system (host) and sensor (IMU) time synchronization (<40 μs)

 2 independent programmable I/O pins for interrupt and synchronization events

 RoHS compliant, halogen and lead free

 BMI270 Features:

Significant motion/Any motion/Motion detect/No motion/Stationary detect/Wrist wear wakeup/Wrist worn step counter and detector/Activity change recognition/Push arm down/Pivot up/Wrist jiggle/Flick in /out

Typical Applications

 Wearables

 Hearables

 Smart clothing

 Augmented / virtual reality (AR/VR)

 Activity & Context Recognition