Datasheet

Preliminary Data Sheet
BMA400
Page 19 /
Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
© 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.
4.2. Power Modes – performance modes
The power mode and all major settings affecting performance, current consumption, noise and output
data rate are controlled in registers ACC_CONFIG0, ACC_CONFIG1 and ACC_CONFIG2.
The BMA400 knows 3 power modes: sleep mode, low-power mode and normal mode.
In sleep mode, current consumption is below 300nA, and data conversions are stopped as well as
sensortime functionality.
In low power mode, data conversion runs with a fixed rate of 25Hz, and performance can be
controlled via ACC_CONFIG0.osr_lp setting. Current consumption ranges between 800 nA and 1100
nA depending on performance setting. The low power mode should be mainly used in combination
with activity detection as self wake-up mode. In this use case, 800 nA are sufficient.
In normal mode, output data rates between 800Hz and 12.5Hz can be configured using the registers
ACC_CONFIG1.acc_odr and ACC_CONFIG1.osr. The noise density performance of the BMA400 is
mainly determined by ACC_CONFIG1.osr. The RMS noise and the resulting current consumption of
the device is influenced by ACC_CONFIG1.acc_odr and ACC_CONFIG1.osr.
Confidential and under NDA
Seeed Studio
Confidential and under NDA
Seeed Studio
Confidential and under NDA