3-AXIS ACCELEROMETER DIGITAL I/F

BMA250

Manufacturer Part NumberBMA250
Description3-AXIS ACCELEROMETER DIGITAL I/F
ManufacturerBosch Sensortec
Series-
BMA250 datasheets
 

Specifications of BMA250

Featured ProductBMA250 - Digital, Triaxial Acceleration SensorAxisX, Y, Z
Acceleration Range±2g, 4g, 8g, 16gSensitivity256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
Voltage - Supply1.62 V ~ 3.6 VOutput TypeI²C™, SPI™
Bandwidth8Hz ~ 1kHzInterfaceI²C, SPI
Mounting TypeSurface MountPackage / Case12-VQFN
Lead Free Status / Rohs StatusLead free / RoHS CompliantFor Use With828-1024 - BMA250 DAUGHTERCARD FOR DEV KIT
Other names828-1023-2  
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BMA250
Digital, triaxial acceleration sensor
Bosch Sensortec
General description
The BMA250 is an advanced, ultra-small, triaxial,
low-g acceleration sensor with digital interfaces,
aiming for low-power consumer electronics applica-
tions.
The BMA250 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.
BMA250 target applications
f
Display profile switching (portrait/landscape,
face-up/face-down switching)
Flat detection
f
f
Tap sensing function
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 size of only 2 mm x 2 mm the BMA250
represents a new generation of digital accelerati-
on sensors. The BMA250 integrates a multitude of
features that facilitate its use especially in the area
of motion detection applications, such as device ori-
entation detection, gaming, HMI and menu browser
control. Featuring a full operation current consump-
tion 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.
The BMA250 is highly configurable in order to give
the designer full flexibility when integrating the sen-
sor into his system.
Sensor operation
The BMA250 supports two modes of operation:
1) Streaming data mode: Acceleration data is directly
read-out via the sensor’s digital interface and comput-
ed by a system µController, application processor or a
base-band processor.
2) Interrupt engine mode: Acceleration data is com-
puted already within the BMA250 by the integrated,
programmable interrupt engine. Depending on the
programmable settings the integrated interrupt engine
of the BMA250 signals the occurrence of certain
events via the sensors` two interrupt pins. The corres-
ponding registers of the BMA250 can easily be set and
read-out via the digital sensor interface.
BMA250
Technical data
Digital resolution
Resolution
(in ±2g range)
Measurement ranges
±2 g, ±4 g, ±8 g, ±16 g
(programmable)
Sensitivity
±2 g: 256 LSB/g
(calibrated)
±4 g: 128 LSB/g
±16 g: 16 LSB/g
Zero-g offset
(over life-time)
Bandwidths
(programmable)
Digital inputs/outputs
2x interrupt pins
Supply voltage
(V
)
DD
I/0 supply voltage
(V
)
DDIO
Temperature range
Current consumption
full operation
139 µA
f
f
low-power mode
7 µA
1 µA
LGA package
2 x 2 x 0.95 mm
Shock resistance
10.000 g x 200 µs
10 bit
3.9 mg
±8 g: 64 LSB/g
±80 mg
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)
3

BMA250 Summary of contents

  • Page 1

    ... Step-counting f Tilt compensation for electronic compass f Sensor features With its size of only the BMA250 represents a new generation of digital accelerati- on sensors. The BMA250 integrates a multitude of features that facilitate its use especially in the area of motion detection applications, such as device ori- entation detection, gaming, HMI and menu browser control. Featuring a full operation current consump- tion of only 139 µ ...

  • Page 2

    ... Integrated interrupt engine One of the key elements of the BMA250 is the enhan- ced intelligent interrupt engine that gives the hard- and software designer full control. Various motion detection scenarios can be identified by the BMA250 and signaled to the system via two interrupt pins ...