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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Page 17/74

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The bandwidth of filtered acceleration data is determined by setting the (0x10) bw bit as
followed:
*) Note: Settings 00xxx result in a bandwidth of 7.81 Hz; settings 1xxxx result in a bandwidth of
1000 Hz. It is recommended to actively use the range from ´01000b´ to ´01111b´ only in order to
be compatible with future products.
The BMA250 supports four different acceleration measurement ranges. A measurement range
is selected by setting the (0x0F) range bits as follows:
Range
0011
0101
1000
1100
others
4.4.2 Temperature data
The width of temperature data is 8 bits given in two´s complement representation. Temperature
values are available in the (0x08) temp register.
The slope of the temperature sensor is 0.5K/LSB, its center temperature is 24°C [(0x08) temp =
0x00]. Therefore, the typical temperature measurement range is -40°C up to 87.5°C.
Rev. 1.0
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such
as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
BMA250
Data sheet
Table 8: Bandwidth configuration
bw
Bandwidth
Update Time
00xxx
*)
01000
7.81Hz
64ms
01001
15.63Hz
32ms
01010
31.25Hz
16ms
01011
62.5Hz
01100
125Hz
01101
250Hz
01110
500Hz
01111
1000Hz
0.5ms
1xxxx
*)
Table 9: Range selection
Acceleration
Resolution
measurement
range
±2g
3.91mg/LSB
±4g
7.81mg/LSB
±8g
15.62mg/LSB
±16g
31.25mg/LSB
reserved
Page 17 / not for publishing
Bosch Sensortec
t
ut
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8ms
4ms
2ms
1ms
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03 March 2011