Datasheet

Preliminary Data Sheet
BMA400
Page 29 /
Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
In low-power mode, only data at 25Hz ODR is available. Depending on the setting of
ACC_CONFIG0.osr_lp, noise and current consumption is controllable.
G-range selection
The measurement g-range can be selected between 2g and 16g. It can be configured
ACC_CONFIG1.acc_range.
ACC_CONFIG1.acc_range<1:0>
Selected g-range
11
16g
10
8g
01
4g
00
2g
Data Ready Interrupt
This interrupt fires whenever a new data sample set is complete. This allows a low latency data readout,
especially avoiding to interfere with front-end conversion activity. In non-latched mode, the interrupt
and the flag in Register INT_STAT0 are cleared automatically after 1/(1600Hz). If this automatic
clearance is unwanted, latched-mode can be used.
In order to enable/use the data ready interrupt map it on the desired interrupt pin via INT1_MAP or
INT2_MAP.
Temperature Sensor
The temperature sensor has 8 bits resolution. The temperature value is defined in Register
TEMP_DATA and updated every 160ms.
It is always on when the sensor is active (in normal and in low-power mode, not in sleep mode).
Value
Temperature
0x7F
87.5 °C
…
…
0x02
25 °C
…
…
0x80
-40.0 °C
The temperature sensor is calibrated with a precision of +/-5°C.
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