The BMI325 is a Bosch consumer-grade 6-axis IMU, featuring three-axis accelerometers and three-axis gyroscopes, with an integrated temperature sensor.

II. Core Parameters

Measurement precision: 16-bit ADC;Acceleration range: ±2/±4/±8/±16g; Gyroscopic ±125/250/500/1000/2000 dps

Communication Interface: I2C / SPI / I3C (supports the new-generation I3C high-speed interface, which is a core selling point)

Power consumption: In high-performance mode, the combined typical current of the accelerometer and gyroscope is 790μA;Supports multiple low-power sleep modes.

Built-in hardware function engine: Features step counting, double-click/single-click detection, tilt detection, motion wake-up, posture detection, a 2KB on-chip FIFO, and a gyroscope with self-calibration CRT support. It offers fast startup (gyroscope initialization <1ms), includes built-in self-test functions, and reduces MCU computational load.

Temperature range: -40°C to +105°C

III. Core Advantages

✅Supports I3C, offering high speed and low pin overhead, suitable for next-generation portable products.✅Built-in motion algorithm that can directly output step-counting results, reducing development workload.✅Pin-compatible with BMI160 and BMI323, allowing direct replacement and upgrade in existing projects.✅Low noise, stable pose tracking, and low latency.

IV. Downstream Product Applications

TWS Earbuds (Hearables): Head posture recognition, gesture tapping, wear detection, spatial audio

Smart Wearables: Smart bands/watchs, step counting, sleep monitoring, posture recognition, fall detection.

AR/VR/MR: Head tracking, gesture recognition, pose localization

Remote control, Air Mouse: Gesture-based remote control, Motion wake-up

Asset Tracking Tags: Vibration/tilt detection, motion wake-up, reduced standby power consumption.

Portable cameras/gimbals, handheld barcode scanners, portable medical devices

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