BMI270 | Bosch Sensortec | Consumer-grade MEMS inertial sensor | 6-axis intelligent IMU (3-axis accelerometer + 3-axis gyroscope)

I. Appearance and Packaging

Packaging: LGA-14 (14-pin plastic LGA), tape-reeled TR packaging, tray packaging for shipment. Bosch Sens...

Dimensions: 2.5 × 3.0 × 0.8 mm, surface-mount miniature device, Bosch Sens...

Appearance description: The top surface is black plastic-sealed, printed with screen-printed "BMI270" and the Bosch logo; The bottom features 14 square gold-plated pads arranged around the perimeter, with no exposed pins; Internally integrated acceleration MEMS and gyroscope MEMS modules, with no external openings; Pin-compatible with BMI160 and BMI260, allowing direct hardware replacement.

Moisture-sensitive level MS-3; reflow soldering requires moisture control, packaged in reels with standard packaging of 5,000 pieces per reel.

II. Core Electrical Performance

Measurement Axis: 3-axis accelerometer + 3-axis gyroscope (6-axis)

Acceleration measurement range: ±2g / ±4g / ±8g / ±16g, programmable img.quarkt...

Gyroscopic range: ±125 / ±250 / ±500 / ±1000 / ±2500 / ±5000 / ±10000 dps, programmable img.quarkt...

Output resolution: 16-bit acceleration, 16-bit gyroscope

Output rate (ODR): Acceleration: 12.5 Hz–1.6 kHz;Gyroscope: 25 Hz–6.4 kHz, Bosch Sens...

Power Supply: VDD: 1.71–3.6V; VDDIO: 1.2–3.6V, supports 1.8V systems, Bosch Sens...

Power consumption: Typical 685 μA in full mode; Only about 10 μA during acceleration operation; Standby: 3.5μA

Communication Interfaces: I²C, SPI, with an AUX auxiliary interface, OIS (Optical Image Stabilization) interface, and two interrupt outputs (INT1/INT2) Bosch Sens...

Built-in resources: 2KB FIFO cache; On-chip motion recognition engine; Pedometer, wrist lift, activity state detection (walking/running/stationary)

Operating temperature: -40°C ~ +85°C

III. Working Principle

Bosch MEMS silicon microfabrication process; accelerometers detect gravity and linear motion; The gyroscope detects angular velocity and rotation; The chip is equipped with a built-in hardware motion processing unit, eliminating the need for an MCU to perform complex algorithms. The chip directly outputs step counting, gesture recognition, and activity status interrupt signals internally, while the host device only needs to read these signals. This significantly reduces the main control unit's computational load and extends battery life.

IV. Typical Application Scenarios

Wearable devices: smartwatches, fitness bands, TWS earbuds, featuring step counting, wrist-up screen activation, posture detection, and fall detection.

VR/AR Controllers: Pose Tracking, Motion Recognition

IoT Portable Devices: Remote Controls, Fitness Bands, Human Activity Monitoring

Mobile Phone: Activity Tracking, Gesture Recognition, Image Stabilization Assistance

Note: Consumer-grade components, not automotive-grade, and cannot be used in vehicle safety systems.

V. Comparison of Options in the Same Series

BMI260: The previous generation's mainstream six-axis IMU, with basic motion functions;

BMI270: Upgraded version, featuring optimized step-counting algorithms and activity recognition capabilities, improved OIS interface, and enhanced power consumption optimization;

BMI263: High seismic resistance version.