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Bosch BHI380 Smart Sensors

Bosch BHI380 Smart Sensor features a programmable inertial measurement unit (IMU)-based sensor system that combines a gyroscope with an accelerometer for full customization. The integrated sensor fusion library allows 3D audio with head orientation, resulting in personalized sound experiences and simple gesture recognition. The sensor is ideal for smartphones and tablets, wearables and hearables, smart devices, and more.

The BHI380 offers a large set of integrated application-specific algorithms and includes self-learning AI software for a variety of fitness tracking. For example, the dedicated swim tracking software measures swimming style, while the pedestrian dead reckoning (PDR) algorithm helps users reach a destination, even when the GPS signal drops out for a brief period.

Bosch BHI380 Smart Sensor comes in a compact 20-pin LGA package with a 2.5mm x 3mm footprint and is 50% smaller than the previous generation.

Features

  • Compact 20-pin LGA package
  • 50% smaller than its previous generation
  • Hardware
    • ARC EM4 CPU (up to 3.6 CoreMark/MHz)
    • Floating point unit (FPU)
    • Memory protection unit (MPU)
    • 4-channel micro DMA controller
    • ARCv2 16bit/32bit instruction set
  • Low-power CPU (Bosch Sensortec Core) optimized for accelerometer-based always-on algorithms
  • Memory
    • 256kByte on-chip SRAM
    • 144kByte on-chip ROM preloaded with software
  • Connectivity
    • Host interface configurable as SPI or I2C
    • 2 secondary master interfaces (one I2C interface and one selectable SPI or I2C)
    • Up to 14 GPIOs
    • Fast I/O operations
    • SPI and GPIOS up to 50MHz
    • I2C up to 3.4MHz
  • Integrated sensor (6 degrees of freedom [DoF] IMU)
    • 16-bit 3-axis accelerometer
    • 16-bit 3-axis gyroscope

Applications

  • Pedestrian navigation
  • AI fitness tracking and swim analytics
  • Head orientation for 3D audio
  • Gesture detection and activity

Specifications

  • 1.8V operating voltage
  • Current consumption Fuser2 (running CoreMark)
    • Long run mode (20MHz): 950μA
    • Turbo mode (50MHz): 2.8mA
  • Sensor fusion (hub+IMU) operation (calculating game-rotation vector)
    • 800Hz ODR: 1.2mA
    • 100Hz ODR: 1mA
    • 8μA standby current
  • Sensor fusion performance
    • 2°, 2°, 2° static accuracy (head, pitch, roll)
    • 7°, 2°, 2° dynamic accuracy (head, pitch, roll)
    • <1s calibration time
    • 0.2s orientation stabilization time
  • 2.5mm x 3mm footprint

Block Diagram

Bosch BHI380 Smart Sensors

Pin configuration

Bosch BHI380 Smart Sensors
Veröffentlichungsdatum: 2023-01-06 | Aktualisiert: 2023-06-14