BMI270 Description

The BMI270 is a 6-axis, smart, low-power Inertial Measurement Unit for high-performance applications. This inertial measurement unit (IMU) combines accurate acceleration and angular rate (gyroscopic) measurement with clever on-chip motion-triggered interrupt capabilities. It is highly integrated and low power. An ultra-low power IMU designed for wearable applications is the BMI270.

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

BMI270 Features

• 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, max. sensitivity error < 1%)

• 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

• Compact standard size LGA mold package, 14 pins, footprint 2.5x3.0mm² height 0.83mm

• Primary digital interface with 10 MHz slave SPI (4-wire, 3-wire) and up to 1MHz I²C (Fm+)

• 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 ca. 5 ∣ 3 … 680 ∣ 890 Hz

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

• Ultra-low current consumption: typ. 685 µA (in full ODR and aliasing-free operation)

• Performance mode for gyroscope to minimize noise level: typ. < 8 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

- 400 kHz I²C (Fm) master interface hub for 1 I2C AUX sensor (e.g. ext. magnetometer, pressure)

* data synchronized to IMU

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

* up to 6.4 kHz ODR, control register access and max. 676 µs group delay

BMI270 Applications

• Wearables

• Hearables

• Smart clothing

• Augmented / virtual reality (AR/VR)