BMI325 Bosch Six Axis Inertial Measurement Unit (IMU) Sensor

The BMI325 Bosch Six Axis Inertial Measurement Unit (IMU) sensor is a six axis IMU sensor that integrates a three-axis accelerometer and a three-axis gyroscope. It is characterized by low power consumption, small size, and fast startup, and is mainly used in wearable devices, headphones, mobile phones, and other products that require motion, posture, and gesture detection. ‌‌

Sensor type: IMU (accelerometer+gyroscope)

Interface: Supports SPI, I ² C, I3C

Power consumption: Typical current is about 790 µ A, standby is 15 µ A

Size: 2.5 × 3 mm, 14 pin LGA package

Function: Supports step counting, tilt detection, tap detection, direction detection, etc

Accelerometer: ± 2g/± 4g/± 8g/± 16g, software programmable; 16bit

Gyroscope: ± 125/± 250/± 500/± 1000/± 2000 dps, software programmable; 16bit

Data output rate ODR: 0.78125Hz~6.4kHz

Scope of Application

Wearable devices: smartwatch, wristband, TWS earphones, smart ring (step counter, hand up display, posture, movement trajectory)

Health and sleep monitoring: intelligent mattress, monitoring bed, recognize turning, body movement, and limb rotation (compared to LIS2DW12, can capture rotation movements)

AR/VR controller, remote control, motion tracking device

IoT battery products: asset positioning tags, wireless attitude sensors

Consumer electronics: mobile phone, tablet screen rotation, smart glasses

Portable instrument: monitoring of equipment vibration and tilt posture

function and role

Simultaneously collecting three-axis acceleration and three-axis angular velocity (rotation), with a built-in motion event engine on the chip, hardware directly judges motion events, outputs interrupts, and reduces the burden on MCU:

1. Attitude detection, tilt, angle calculation, equipment orientation recognition

2. Step counting algorithm (step error of about ± 3%), motion/stationary detection, wake-up sleep

3. Gesture recognition, picking detection, vibration detection

4. Free fall detection and high-speed motion capture

5. The gyroscope comes with temperature self calibration to reduce temperature drift and improve attitude stability

key points

1. Six axis IMU with gyroscope, capable of measuring rotation angle, suitable for projects requiring attitude and azimuth calculation; LIS2DW12 only measures three-axis acceleration and cannot measure rotation

2. Supports I3C high-speed interface, commonly used in the new generation of wearable devices

3. Consumer grade, cannot directly enter the vehicle standard project

4. Pin compatible with BMI323, convenient for customers to upgrade hardware

For technical and business inquiries, please contact Mr. Zhang at 13430464310