Bosch Sensortec
BHI385 - Accelerometer, Gyroscope Sensor I2C, SPI Output
Bosch BHI385 Smart Programmable AI IMU – A compact 6-axis inertial measurement unit with integrated AI and a 32-bit programmable microcontroller for always-on motion sensing, activity recognition, and gesture detection. Ideal for wearables, AR/VR, and IoT devices requiring ultra-low power intelligent motion processing.
Features:
Fully programmable
Extended accelerometer range
Advanced software
Easy deployment
Precise AI algorithm
Power efficient/low power consumption
Applications:
Wearables
Sports activity tracking/evaluation
Fitness equipment and smart clothing
Head-mounted devices
Impact detection
Human-machine interactions
Specifications:
2.5mm x 3.0mm x 0.95mm size
Current consumption
Fuser2 (running CoreMark)
950μA in long run mode at 20MHz
2.8mA in turbo mode at 50MHz
Sensor Fusion (Hub+IMU) operation (calculating Game Rotation Vector)
1.2mA for the 800Hz ODR
1.0mA for the 100Hz ODR
8μA standby current
Digital resolution
16-bit accelerometer
16-bit gyroscope
Measurement ranges
±4g, ±8g, ±16g, and ±28g for the accelerometer (at full scale ±32g, the maximum measurable acceleration is typically ±28g)
±125°/s, ±250°/s, ±500°/s, ±1000°/s, and ±2000°/s for the gyroscope
Selectable output data rates
12.5Hz to 1.6KHz for the accelerometer
12.5Hz to 6.4kHz for the gyroscope
Offset soldered, over life
±25mg for the accelerometer
±0.5°/s for the gyroscope
TCO
±0.25mg/K for the accelerometer
±0.015°/s/K for the gyroscope
Sensitivity error
0.4% for the accelerometer
2% for the gyroscope
Typical noise density
Accelerometer
160μg/√Hz (8g)
170μg/√Hz (28g)
Gyroscope
0.007°/s/√Hz in performance mode
0.01°/s/√Hz in normal mode
Interfaces
Host interface configurable as SPI or I2C
2x secondary master interfaces - 1x I2C interface and 1x selectable SPI or I2C
Up to 14x GPIOs
High performance mode, normal mode, low power mode (LPM), and suspend mode
256kByte on-chip SRAM memory
-40°Cto +85°C operating temperature range
Supply voltages
1.71V to 3.6V for VDD
1.71V to 1.89V for VDDIO