7Semi BMA400 3-Axis Digital Accelerometer Breakout STEMMA QT / Qwiic

The 7Semi BMA400 3-Axis Digital Accelerometer Breakout is a compact motion-sensing module based on the Bosch BMA400 ultra-low-power MEMS accelerometer. It provides high-efficiency 3-axis acceleration measurement with selectable ranges and includes onboard step-counting and activity-recognition capabilities. The board supports I²C communication and features a Qwiic / STEMMA QT connector for easy plug-and-play integration into IoT, wearable, smart-home and embedded motion-detection applications.

Technical Specifications:

• Sensor: Bosch BMA400 3-axis MEMS accelerometer
  
• Measurement Range: ±2 g / ±4 g / ±8 g / ±16 g
  
• Resolution: 12-bit digital output
  
• Output Data Rate: 12.5 Hz to 800 Hz
  
• Supply Voltage: 1.72 V to 3.6 V
  
• Typical Active Current: <14.5 µA
  
• Sleep Mode Current: ~0.8 µA
  
• Interface: I²C (default) and optional SPI
  
• I²C Address: 0x14 default, alternate 0x15
  
• Interrupt Functions: Step counter, tap/double-tap, orientation change, wake-up, motion detection
  
• Connector Support: Qwiic / STEMMA QT and header pins
  
• Package Size (sensor die): Approx. 2 × 2 mm

Features:

• Ultra-low-power 3-axis motion sensing suitable for battery-powered systems
  
• Selectable full-scale measurement ranges for multiple motion profiles
  
• Built-in step counting and activity recognition
  
• Qwiic / STEMMA QT plug-and-play connectivity
  
• Breadboard-friendly header option for prototyping
  
• Supports both I²C and SPI interfaces

Applications:

• Wearable devices and fitness tracking
  
• Smart-home and IoT motion-detection systems
  
• Portable and battery-operated electronics
  
• Robotics and drone orientation or vibration sensing
  
• Industrial vibration and tilt monitoring
  
• Intrusion detection and automation systems