BMA250

The BMA250 is an advanced, ultra-small, triaxial, low-g acceleration sensor with digital interfaces, aiming for low-power consumer electronics applications. The sensor allows measurement of accelerations in 3 perpendicular axes and thus senses tilt, motion, shock and vibration in cellular phones, handhelds, computer peripherals, man-machine interfaces, virtual reality features and game controllers.

The BMA250 integrates a multitude of features that facilitate its use especially in the area of motion detection applications, such as device orientation detection, gaming, HMI and menu browser control. Featuring a full operation current consumption of only 139 μA the BMA250 is ideally suited for mobile consumer electronic devices. In low-power mode operation the current consumption can be even further reduced by more than one order of magnitude.

Applications

  • Display profile switching (ff portrait/landscape, face-up/face-down switching)
  • Flat detection
  • Tap sensing function
  • Menu scrolling
  • Gaming
  • Advanced power management for mobile devices
  • Shock and free-fall detection
  • Step-counting
  • Tilt compensation for electronic compass
 
 
Parameter Technical data
Digital resolution 10 bit
Resolution
(±2 g range)		 3.9 mg
Measurement range
(programmable)		 ±2 g, ±4 g, ±8 g, ±16 g
Sensitivity
(calibrated)		 ±2 g: 256 LSB/g
±4 g: 128 LSB/g
±8 g: 64 LSB/g
±16 g: 32 LSB/g
Zero-g offset
(over lifetime)		 ±80 mg
Bandwidths
(programmable)		 1000 Hz ... 8 Hz
Digital inputs/ outputs SPI & I²C, 2x digital interrupt pins
Supply voltage 1.62 V ... 3.6 V
I/O supply voltage 1.2 V ... 3.6 V
Temperature range -40°C … +85°C
Current consumption
(full operation)		 139 μA (@ 2 kHz data rate)
Current consumption
(low-power mode)		 7 μA (@ 40 Hz data rate)
LGA package 2 x 2 x 0.95 mm³
Interrupts
  • Data-ready (e. g. for processor synchronization)
  • Any-motion (slope) detection (e. g. for wake-up)
  • Tap sensing (e. g. for tap-sensitive UI control)
  • Orientation change recognition (e. g. for portrait/landscape & face-up/face-down switching)
  • Flat detection (e. g. for position sensitive switching)
  • Low-g / high-g detection (e. g. for shock and free-fall detection)
 
 
Type of document Download
Flyer BST-BMA250-FL000-02
Datasheet BST-BMA250-DS002-05