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Bosch Sensortec
Precise. Extended-g range. Self-learning.

Smart sensor: BHI385

The BHI385 is a fully programmable smart IMU. Its extended accelerometer range and advanced software enable motion tracking, even in high-dynamic applications like sports wearables. Motion AI Studio empowers you to easily deploy custom machine learning models, bringing unmatched performance and flexibility to the edge of your wearable designs.

  • Extended-g range
  • Integrated AI with self-learning function

Sport activity tracking

Detailed sport movement evaluation

Impact detection

Human-machine interaction

Technical data

Package dimensions (typ.)
2.5 x 3.0 x 0.95mm³
Current consumption
Fuser2 (running CoreMark)
  • Long Run mode (20 MHz)
  • Turbo mode (50 MHz)
Sensor Fusion (Hub+IMU) operation (calculating Game Rotation Vector)
  • 800 Hz ODR
  • 100 Hz ODR
Standby current



950 μA
2.8 mA




1.2 mA
1.0 mA


8 μA
Digital resolution
Accelerometer (A): 16-bit
Gyroscope (G): 16-bit
Measurement ranges
(* at Full Scale ±32g, the maximum measurable acceleration is typically ±28g)
(A): ±4, ±8, ±16 g, ±28g*
(G): ±125°/s, ±250°/s, ±500°/s, ±1000°/s, ±2000°/s
Output data rates (selectable)
(A): 12.5Hz … 1.6KHz
(G): 12.5 Hz ... 6.4 kHz
Offset soldered, over life
(A): ± 25 mg
(G): ± 0.5 °/s
TCO
(A): ± 0.25 mg/K
(G): ± 0.015 °/s/K
Sensitivity Error
(A): 0.4%
(G): 2%
Noise density (typ.)
(A): 160 μg/√Hz (8g),
170 μg/√Hz (28g)
(G): 0.007 °/s/√Hz (performance mode),
0.01 °/s/√Hz (normal mode)
Interface
▶ Host interface configurable as SPI or I2C
▶ 2 secondary master interfaces
 one I²C interface
 one selectable SPI or I²C
▶ Up to 14 GPIOs
Power modes
High perf. mode, normal mode, low power mode (LPM), suspend mode
Memory
256 kByte on-chip SRAM
Temperature range
-40 … +85 °C
Supply voltage
1.71 ... 3.6 V (VDD)
1.71 ... 1.89 V (VDDIO)

Documents

BST-BHI385-FL000

Flyer

BST-BHI385-FL000

Download
BST-BHI385-SF000

Shuttle board flyer

BST-BHI385-SF000

Download

Software

available soon

Applications and solutions

Stories

Man and woman doing push ups with fitness trackers

Strong, stronger, sensing solutions with AI

Level up with the smart sensor BHI385 in fitness wearables and Artificial Intelligence.

Learn more

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CGI of Bosch Sensortec's smart sensor BHI360

BHI360

BHI360 is a highly integrated, ultra-low power, smart 6-axis IMU consisting of a 32-bit programmable microcontroller. In addition, it consists of an ultra-low power microprocessor, including pre-installed sensor fusion software and algorithms in a single package.
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