BMA222 Bosch Sensortec, BMA222 Datasheet - Page 16

• Manufacturer Part Number: BMA222
• Description: 3-AXIS ACCELEROMETER DIGITAL SMD
• Manufacturer: Bosch Sensortec

Specifications of BMA222

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 828-1025-2

4.4 Sensor data
4.4.1 Acceleration data
The width of acceleration data is 8 bits given in two´s complement representation. The 8 bits for
each axis are given in registers (0x03) acc_x, (0x05) acc_y and, (0x07) acc_z.
The corresponding new data flags are given as (0x02) new_data_x, (0x04) new_data_y and
(0x06) new_data_z. The remaining bits of these registers are fixed to 0.
The new data flags (0x02) new_data_x, (0x04) new_data_y and (0x06) new_data_z are set if
the corresponding acceleration data registers (0x03) acc_x, (0x05) acc_y or, (0x07) acc_z have
internally been updated. They are reset if the corresponding acceleration data registers have
been read.
Two different streams of acceleration data are available, unfiltered and filtered. The unfiltered
data is sampled with 2kHz. The sampling rate of the filtered data depends on the selected filter
bandwidth; it is twice the bandwidth. Which kind of data is stored in the acceleration data
registers depends on bit (0x13) data_high_bw. If (0x13) data_high_bw is ´0´ (´1´), then filtered
(unfiltered) data is stored in the registers. Both data streams are separately offset-compensated.
Both kinds of data can be processed by the interrupt controller.
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.
Table 7: Average current consumption in low-power mode
Sleep phase
duration
100ms
500ms
0.5ms
10ms
25ms
50ms
2ms
4ms
6ms
1ms
1s
Data sheet
BMA222
Page 16
consumption
100.5 μA
Average
current
78.8 μA
55.0 μA
34.5 μA
25.2 μA
16.4 μA
2.3 μA
7.4 μA
4.0 μA
0.9 μA
0.7 μA
Bosch Sensortec
07 March 2011