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 58/74

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6.2 Inter-Integrated Circuit (I²C)
The I²C bus uses SCL (= SCx pin, serial clock) and SDA (= SDx pin, serial data input and
output) signal lines. Both lines are connected to V
are pulled high when the bus is free.
The I²C interface of the BMA250 is compatible with the I²C Specification UM10204 Rev. 03 (19
June 2007), available at http://www.nxp.com. The BMA250 supports I²C standard mode and fast
mode, only 7-bit address mode is supported. For V
output levels are slightly relaxed as described in the Parameter Specification (table 1).
The default I²C address of the device is 0011000b (0x18). It is used if the SDO pin is pulled to
´GND´ or left open (floating). The alternative address 0011001b (0x19) is selected by pulling the
SDO pin to ´V
´.
DDIO
The timing specification for I²C of the BMA250 is given in table 74:
Table 74: I²C timings
Parameter
Symbol
Clock Frequency
f
SCL
SCL Low Period
t
LOW
SCL High Period
t
HIGH
SDA Setup Time
t
SUDAT
SDA Hold Time
t
HDDAT
Setup Time for a
t
SUSTA
repeated Start Condition
Hold Time for a Start
t
HDSTA
Condition
Setup Time for a Stop
t
SUSTO
Condition
Time
before
a
new
t
BUF
Transmission can start
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
externally via pull-up resistors so that they
DDIO
= 1.2V to 1.8V the guaranteed voltage
DDIO
Condition
Min
1.3
0.6
0.1
0.0
0.6
0.6
0.6
1.3
Page 58 / not for publishing
Bosch Sensortec
Max
Units
400
kHz
s
03 March 2011