BMA250 Bosch Sensortec, BMA250 Datasheet - Page 17

• Manufacturer Part Number: BMA250
• Description: 3-AXIS ACCELEROMETER DIGITAL I/F
• Manufacturer: Bosch Sensortec
• Series: -r

Specifications of BMA250

• Featured Product: BMA250 - Digital, Triaxial Acceleration Sensor
• Axis: X, Y, Z
• Acceleration Range: ±2g, 4g, 8g, 16g
• Sensitivity: 256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
• Voltage - Supply: 1.62 V ~ 3.6 V
• Output Type: I²C™, SPI™
• Bandwidth: 8Hz ~ 1kHz
• Interface: I²C, SPI
• Mounting Type: Surface Mount
• Package / Case: 12-VQFN
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With: 828-1024 - BMA250 DAUGHTERCARD FOR DEV KIT
• Other names: 828-1023-2

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:
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.
Range
others
0011
0101
1000
1100
01000
01001
01010
01011
01100
01101
01110
01111
00xxx
1xxxx
Table 8: Bandwidth configuration
bw
Page 17 / not for publishing
measurement
Acceleration
Table 9: Range selection
reserved
range
±16g
±2g
±4g
±8g
Bandwidth
Data sheet
15.63Hz
31.25Hz
BMA250
1000Hz
7.81Hz
62.5Hz
125Hz
250Hz
500Hz
*)
*)
Update Time
15.62mg/LSB
31.25mg/LSB
7.81mg/LSB
3.91mg/LSB
Resolution
0.5ms
64ms
32ms
16ms
8ms
4ms
2ms
1ms
t
-
-
ut
-
Bosch Sensortec
03 March 2011