BMA020 Bosch Sensortec, BMA020 Datasheet - Page 17

• Manufacturer Part Number: BMA020
• Description: 3-AXIS ACCELEROMETER DIGITAL I/F
• Manufacturer: Bosch Sensortec

Specifications of BMA020

• Axis: X, Y, Z
• Acceleration Range: ± 2g, 4g, 8g
• Sensitivity: 256LSB/g, 128LSB/g, 64LSB/g
• Voltage - Supply: 2 V ~ 3.6 V
• Output Type: Digital
• Bandwidth: 3kHz
• Interface: I²C, SPI
• Mounting Type: Surface Mount
• Package / Case: 12-LGA
• For Use With: 828-1014 - BMA020 TRIBOX DEMO BOARD W/USB828-1008 - BMA020 DAUGHTERCARD FOR DEV KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 828-1000-2

Data sheet
BMA020
Bosch Sensortec
Digital, triaxial acceleration sensor
Figure 2: Any motion criterion (middle graph) is determined from digital filter output (upper
graph) and depends on bandwidth settings: for example for any_motion_dur=01b and
bandwidth=110b (1.5kHz), we have 2*bandwidth=3ksamples/s which leads to reaction for
interrupt activation of 3*333µs = 1ms and a minimum any motion interrupt duration of 3*333us =
1ms (see lower graph).
If lower bandwidth is selected i) the digitally filtered values (lower noise) are taken for the
verification of the any motion criterion and ii) the time scale to evaluate the criterion is stretched.
Thus adjusting the bandwidth, the any motion threshold, the any motion duration as well as the
full scale range enables to tailor the sensitivity of the any motion algorithm.
Rev. 1.2
Page 17
30 May 2008
© 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.