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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For single byte read as well as write operations, 16-bit protocols are used. The BMA250 also
supports multiple-byte read operations.
In SPI 4-wire configuration CSB (chip select low active), SCK (serial clock), SDI (serial data
input), and SDO (serial data output) pins are used. The communication starts when the CSB is
pulled low by the SPI master and stops when CSB is pulled high. SCK is also controlled by SPI
master. SDI and SDO are driven at the falling edge of SCK and should be captured at the rising
edge of SCK.
The basic write operation waveform for 4-wire configuration is depicted in figure 11. During the
entire write cycle SDO remains in high- impedance state.
CSB
SCK
SDI
R/W
AD6
AD5
SDO
Figure 11: 4-wire basic SPI write sequence (mode ´11´)
The basic read operation waveform for 4-wire configuration is depicted in figure 12:
CSB
SCK
SDI
R/W
AD6
AD5
SDO
Figure 12: 4-wire basic SPI read sequence (mode ´11´)
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
AD4
AD3
AD2
AD1
AD0
DI7
DI6
DI5
Z
tri-state
AD4
AD3
AD2
AD1
AD0
DO7 DO6
DO5 DO4 DO3 DO2 DO1 DO0
Page 56 / not for publishing
Bosch Sensortec
DI4
DI3
DI2
DI1
DI0
tri-state
03 March 2011