BMA250 Bosch Sensortec, BMA250 Datasheet - Page 10
Manufacturer Part Number
3-AXIS ACCELEROMETER DIGITAL I/F
Specifications of BMA250
BMA250 - Digital, Triaxial Acceleration Sensor
X, Y, Z
±2g, 4g, 8g, 16g
256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
Voltage - Supply
1.62 V ~ 3.6 V
8Hz ~ 1kHz
Package / Case
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With
828-1024 - BMA250 DAUGHTERCARD FOR DEV KIT
3. Block diagram
Figure 1 shows the basic building blocks of the BMA250:
4. Functional description
Note: Default values for registers can be found in chapter 5.
4.1 Power management
The BMA250 has two distinct power supply pins:
is the main power supply for all internal analog and digital functional blocks;
is a separate power supply pin, exclusively used for the supply of the digital interface.
There are no limitations on the voltage levels of both pins relative to each other, as long as each
of them lies within its operating range. Furthermore, the device can be completely switched off
= 0V) while keeping the V
= 0V) and keep the internal supply on (V
device is in low-power mode or suspend mode while V
consumption on the V
It is absolutely prohibited to keep any interface at a logical high level when V
Such a configuration will permanently damage the device (i.e. if V
& CSB] ≠ high).
The device contains a power-on reset (POR) generator. It resets the logic part and the register
values after powering-on V
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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.
Figure 1: Block diagram of BMA250
supply on (V
> 0V). To switch off the interface supply
> 0V) is safe only in normal mode. If the
. There is no limitation on the sequence of switching on
Page 10 / not for publishing
= 0V, there is a risk of excess current
is switched off.
= 0 [SDI & SDO & SCK
03 March 2011