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
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Technical data
Package dimensions (typ.)
2.5 x 3.0 x 0.95mm³
Current consumption
Fuser2 (running CoreMark)
Fuser2 (running CoreMark)
- Long Run mode (20 MHz)
- Turbo mode (50 MHz)
- 800 Hz ODR
- 100 Hz ODR
950 μA
2.8 mA
1.2 mA
1.0 mA
8 μA
Digital resolution
Accelerometer (A): 16-bit
Gyroscope (G): 16-bit
Gyroscope (G): 16-bit
Measurement ranges
(* at Full Scale ±32g, the maximum measurable acceleration is typically ±28g)
(* 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
(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
(G): 12.5 Hz ... 6.4 kHz
Offset soldered, over life
(A): ± 25 mg
(G): ± 0.5 °/s
(G): ± 0.5 °/s
TCO
(A): ± 0.25 mg/K
(G): ± 0.015 °/s/K
(G): ± 0.015 °/s/K
Sensitivity Error
(A): 0.4%
(G): 2%
(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)
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
▶ 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)
1.71 ... 1.89 V (VDDIO)
