Bosch MAN-REG-X-08 Especificaciones descargar pdf (Pagina 54)

Data sheet

BMA220

Page 54

BST-BMA220-DS003-08 | Revision 1.15 | August 2011 Bosch Sensortec

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.

9.2 Sensing axes orientation and polarity of the acceleration output

If the sensor is accelerated in the indicated directions, the corresponding channel will deliver a

positive acceleration signal (dynamic acceleration). If the sensor is at rest and the force of

gravity is working along the indicated directions, the output of the corresponding channel will be

negative (static acceleration).

Example: If the sensor is at rest or at uniform motion in a gravity field according to the figure

given below, the output signals are:

 ± 0g for the X channel

 ± 0g for the Y channel

 + 1g for the Z channel

top side

gravity vector

Figure 33: Orientation of sensing axes

The following table lists all corresponding output signals on X, Y, and Z while the sensor is at

rest or at uniform motion in a gravity field under assumption of a ±2g range setting and a top

down gravity vector as shown above.

Table 25: Output signals depending on sensor orientation

Sensor Orientation

(gravity vector )

Output Signal X

0g / 0LSB 1g / 16LSB 0g / 0LSB -1g / -16LSB 0g / 0LSB 0g / 0LSB

Output Signal Y

-1g / -16LSB 0g / 0LSB +1g / 1.8V 0g / 0LSB 0g / 0LSB 0g / 0LSB

Output Signal Z

0g / 0LSB 0g / 0LSB 0g / 0LSB 0g / 0LSB 1g / 16LSB -1g / -16LSB

upright

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Bosch MAN-REG-X-08 Especificaciones Pagina 54