BMA180
Digital, triaxial acceleration sensor
Bosch Sensortec
General description
The BMA180 is an ultra high performance digital
triaxial acceleration sensor, aiming for low power
consumer market applications.
The BMA180 allows high accurate measurement of
accelerations in 3 perpendicular axes and thus sen-
ses tilt, motion, shock and vibration in cell phones,
handhelds, computer peripherals, man-machine inter-
faces, virtual reality features and game controllers.
BMA180 target applications
f
Navigation (INS / Dead Reckoning)
f
High accurate tilt detection
(e.g. tilt compensated compass)
f
Pointing and menu scrolling
f
Display profile switching (portrait / landscape)
f
Gaming
f
Drop detection for warranty logging
f
Shock detection
f
Step-counting
Sensor operation
The BMA180 represents a new generation of digital
acceleration sensors with a unique performance and
feature set within 3 mm x 3 mm x 0.9 mm standard
LGA package.
Nonlinearity
Zero-g offset (ex-factory)
Zero-g offset
(after offset fine tuning)
Zero-g offset
temperature drift
Noise density
Bandwidth
(switchable
via SPI/I²C)
Supply
voltages
low pass
high pass
band pass
V
DD
V
DDIO
150µg / √Hz
10Hz ... 1200Hz
1Hz
0.2 ... 300Hz
SPI & I²C, interrupt pin
1.62 ... 3.6V
1.20 ... 3.6V
650µA
-40°C … +85°C
±0.5mg/K
Resolution
The BMA180 is highly configurable in order to give the
designer full flexibility when integrating the sensor
into his system. All features can be set by software
via the digital interface. Here the user can choose
between an I²C and an SPI (4-wire) interface mode.
Technical data
Sensitivity axes
Measurement range
(switchable via SPI / I²C)
Sensitivity (calibrated)
BMA180
x/y/z
±1g, ±1.5g, ±2g, ±3g, ±4g,
±8g, ±16g
1g: 8192LSB/g
1.5g: 5460LSB/g
2g: 4096LSB/g
3g: 2730LSB/g
4g: 2048LSB/g
8g: 1024LSB/g
16g:
512LSB/g
(±2g range)
(switchable 12 bit option)
±0.15% FS (±2g range)
±15mg
±5mg
14bit
0.244mg
Key features BMA180
f
All parameters and features user programmable
f
7 user programmable g-ranges and 10 selectable
bandwidth settings
f
Low-power consumption
f
Ultra-low-power self-wake-up mode
f
User programmable interrupt engine
f
0g offset regulation and in-field offset re-calibration
with ultra-high accuracy
f
SPI (4-wire) / I²C interface
f
RoHS compliant, halogen-free
Digital input / output
Current consumption
Temperature range
2
Bosch Sensortec
BMA180
BMA180 Pin configuration (top view)
One of the key elements of the BMA180 is the intelli-
gent interrupt engine that gives the hard- and software
designer full control. Various motion detection scena-
rios can be identified by the BMA180 and signaled
to the system via a simple interrupt pin. By using the
digital serial interface, the exact details of the motion
event that triggered the interrupt can be read-out.
Following motion detection use case scenarios are
supported by the interrupt engine:
f
Any-motion (slope) detection
f
Tap sensing
f
Low-g / high-g detection
f
Data-ready with sample skipping option
f
Self-wake-up
Pin
The interrupts can be conveniently configured by the
user and thus perfectly support the integration of the
BMA180 into the user’s system environment.
Another important feature of the BMA180 acceleration
sensor is the power management module. This module
allows for optimizing the sensor’s power consumption
in-line with the specific user requirements. Thus, it is
not necessary to operate the sensor at full power for
all application scenarios all the time. For some use
cases the power consumption drastically shrinks to
just a fraction of what would be required in full per-
formance mode. Moreover this feature of the BMA180
allows for an intelligent system power management
and thus significant reduction of the whole system’s
power consumption. In particular, this helps increa-
sing battery life-time of any kind of mobile device.
No.
1
2
3
4
5
6
7
8
9
10
11
12
DNC
VDD
VSS
INT
CSB
DNC
SCK
SDO
SDI
VDDIO
DNC
DNC
Do not connect
Analog supply voltage
Ground
Interrupt output
SPI chip select
Do not connect
Serial clock
Serial data output
Serial data in /out
Digital interface power supply
Do not connect
Do not connect
Name
Function
DNC
V
DD
V
SS
INT
CSB
1
2
3
4
5
6
DNC
12
11
10
DNC
V
DDIO
SDI
SDO
SCK
BMA180
(top view)
9
8
7
DNC
Headquarters
Bosch Sensortec GmbH
Gerhard-Kindler-Strasse 8
72770 Reutlingen · Germany
Telephone +49 7121 3535 900
Fax +49 7121 3535 909
contact@bosch-sensortec.com
www.bosch-sensortec.com
Specification subject to change without notice
Doc.-Number: BST-BMA180-FL000-03 / Version_1.3_072010
© Bosch Sensortec GmbH reserves all rights 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 symbols are registered trademarks of Robert Bosch GmbH, Germany.
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