BMA255

Manufacturer Part NumberBMA255
DescriptionSpecifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
ManufacturerBosch Sensortec
BMA255 datasheet
 


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BMA255
Digital, triaxial acceleration sensor
Bosch Sensortec
General Description
The BMA255 is an advanced, ultra-small, triaxial,
low-g acceleration sensor with digital interfaces,
aiming for low-power consumer electronics applica-
tions. 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.
BMA255 target applications
f
Display profile switching (portrait/landscape,
face-up/face-down switching)
Flat detection
f
f
Tap / double tap sensing
Menu scrolling
f
Gaming
f
Advanced power management for mobile devices
f
f
Shock and free-fall detection
Step-counting
f
Tilt compensation for electronic compass
f
Sensor features
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 facili-
tate 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.
BMA255
Technical data
Digital resolution
Resolution
(in ±2g range)
Measurement ranges
±2 g, ±4 g, ±8 g, ±16 g
(programmable)
Sensitivity
±2 g: 1024 LSB/g
(calibrated)
±4 g: 512 LSB/g
±8 g: 256 LSB/g
±16 g: 128 LSB/g
Zero-g offset
(typ., over life-time)
Noise desity (typ.)
Bandwidths
(programmable)
Digital inputs/outputs
2x digital interrupts
Supply voltage
(V
)
DD
I/0 supply voltage
(V
)
DDIO
Temperature range
Current consumption
f full operation
130 µA
f low-power mode
6 µA
1 µA
FIFO data buffer
32 sample depth
LGA package
2 x 2 x 0.95 mm
Shock resistance
10.000 g x 200 µs
Sensor operation
The BMA255 supports two modes of operation:
1) Standard data polling mode: Acceleration data
is directly read-out via the sensor’s digital interface
and computed by a system μController, application
processor or a base-band processor.
2) Interrupt engine mode: Acceleration data is com-
puted already within the BMA255 by the integrated,
12 bit
0.9 8 mg
±60 mg
150 µg/√Hz
1000 Hz ... 8 Hz
SPI & I
C,
2
1.62 … 3.6 V
1.2 … 3.6 V
-40 … +85°C
(@ 2 kHz data rate)
(@ 40 Hz data rate)
(@ 1 Hz data rate)
(for each axis)
3