BMA250 Bosch Sensortec, BMA250 Datasheet - Page 41

3-AXIS ACCELEROMETER DIGITAL I/F

BMA250

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

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
5.7 g-range selection
Register (0x0F) contains the selection of the g-range. Proper settings for (0x0F) range are
´0011b´ (selects ±2g range), ´0101b´ (selects ±4g range), ´1000b´ (selects ±8g range), ´1100b´
(selects ±16g range). All other settings are irregular; if such a setting is used, ±2g range is
selected. Default value of (0x0F) range (after reset) is ´0011b´.
Table 35: g-range, register (0x0F)
Bit 7
Bit 6
Bit 5
reserved
reserved
reserved
5.8 Bandwidths
Register (0x10) contains the selection of the bandwidth for filtered acceleration data. Settings
for (0x10) bw are ´00xxxb´ (bandwidth = 7.81 Hz), ´01000b´ (bandwidth = 7.81 Hz), ´01001b´
(bandwidth = 15.63 Hz), ´01010b´ (bandwidth = 31.25 Hz), ´01011b´ (bandwidth = 62.5 Hz),
´01100b´ (bandwidth = 125 Hz), ´01101b´ (bandwidth = 250 Hz), ´01110b´ (bandwidth = 500
Hz), ´01111b´ (bandwidth = 1000 Hz), ´1xxxxb´ (bandwidth = 1000 Hz). Default value of (0x10)
bw (after reset) is ´11111b´. It is recommended to actively use the range from ´01000b´ to
´01111b´ only in order to be compatible with future products.
Table 36: Bandwidths, register (0x10)
Bit 7
Bit 6
Bit 5
reserved
reserved
reserved
5.9 Power modes
Register (0x11) contains the configuration of the power modes. (0x11) suspend = ´1´ (´0´) sets
(resets) suspend mode; default value of (0x11) suspend is ´0´.
(0x11) lowpower_en = ´1´ (´0´) sets (resets) low-power mode, default value of (0x11)
lowpower_en is ´0´.
The settings for (0x11) sleep_dur are ´0000b´ to ´0101b´ (sleep phase duration = 0.5 ms),
´0110b´ (sleep phase duration = 1 ms), ´0111b´ (sleep phase duration = 2 ms), ´1000b´ (sleep
phase duration = 4 ms), ´1001b´ (sleep phase duration = 6 ms), ´1010b´ (sleep phase duration =
10 ms), ´1011b´ (sleep phase duration = 25 ms), ´1100b´ (sleep phase duration = 50 ms),
´1101b´ (sleep phase duration = 100 ms), ´1110b´ (sleep phase duration = 500 ms), ´1111b´
(sleep phase duration = 1 s). Default value of (0x11) sleep_dur is ´0000b´.
Table 37: Power modes, register (0x11)
Bit 7
Bit 6
Bit 5
suspend
lowpower
reserved
_en
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
Bit 4
Bit 3
Bit 2
reserved
range
range
<3>
<2>
Bit 4
Bit 3
Bit 2
bw <4>
bw <3>
bw <2>
Bit 4
Bit 3
Bit 2
sleep_
sleep_
sleep_
dur<3>
dur<2>
dur<1>
Page 41 / not for publishing
Bosch Sensortec
Bit 1
Bit 0
range
range
<1>
<0>
Bit 1
Bit 0
bw <1>
bw <0>
Bit 1
Bit 0
sleep_
reserved
dur<0>
03 March 2011

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