BMA255

The BMA255 is an advanced, ultra-small, triaxial,low-g acceleration sensor with digital interfaces, aiming for low-power consumer electronics applications. Featuring 12 bit digital resolution, the BMA255 allows very low-noise 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.

With its ultra-small footprint of only 2 mm x 2 mm the BMA255 is unique in the class of low-noise, 12 bit digital acceleration sensors. On top, the BMA255 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 130 μA the BMA255 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. The BMA255 is highly configurable in order to give the designer full flexibility when integrating the sensor into the system.

Applications

  • Display profile switching (portrait/landscape, face-up/face-down switching)
  • Flat detection
  • Tap / double tap sensing
  • 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 12 bit
Resolution
(in ±2g range)
0.98 mg
Measurement ranges
(programmable)
±2 g, ±4 g, ±8 g, ±16 g
Sensitivity
(calibrated)
±2 g: 1024 LSB/g
±4 g: 512 LSB/g
±8 g: 256 LSB/g
±16 g: 128 LSB/g
Zero-g offset
(typ., over life-time)
±60 mg
Noise density (typ.) 150 μg/√Hz
Bandwidths
(programmable)
1000 Hz ... 8 Hz
Digital inputs/outputs SPI & I²C,
2x digital interrupt pins
Supply voltage (VDD) 1.62 … 3.6 V
I/0 supply voltage (VDDIO ) 1.2 … 3.6 V
Temperature range -40 … +85°C
Current consumption
(full operation)
130 μA (@ 2 kHz data rate)
Current consumption
(low-power mode)
6.5 μA (@ 40 Hz data rate)
FIFO data buffer 32 sample depth
(for each axis)
LGA package 2 x 2 x 0.95 mm³
Shock resistance 10,000 g x 200 μs
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 switching)
  • Flat detection (e. g. for position sensitive switching)
  • Low-g / high-g detection (e. g. for shock and freefall detection)
  • No-motion (e.g. for power saving)
 
 

Type of document Download
Flyer BST-BMA255-FL000-02
Datasheet BST-BMA255-DS004-05