BMA020
Digital, triaxal acceleration sensor
Bosch Sensortec
General description
The BMA020 senses tilt, motion, shock and vibration
The BMA020 is a triaxial, low-g acceleration sensor
in cell phones, handhelds, computer peripherals,
with digital interfaces, aiming for low-power consu-
man-machine interfaces, virtual reality features and
mer market applications.
game controllers.
The BMA020 has been designed to match a multitude
BMA020 target applications
of hardware requirements. Key features like g-range
ff Advanced power management for mobile devices
and filtering characteristics are programmable by the
ff Drop detection for warranty logging
customer. Since the sensor has a very small package
ff Menu scrolling, tip-tap function
and very low power consumption it is a perfect fit for
ff Display profile switching (portrait/landscape)
mobile applications. The BMA020 can be customer
ff Shock detection
programmed to further optimize functionality and
ff Gaming
performance in all consumer applications. Especially
the very low stand-by current and fast wake-up time
underline the suitability for state-of-the-art mobile
low-power designs.
Technical data
The BMA020 allows measurement of accelerations in
Sensitivity axes
3 perpendicular axes. An evaluation circuitry con-
Measurement range
BMA020
verts the output of a three-channel micromechanical
x/y/z
±2g, ±4g, ±8g
(switchable via SPI/I2C)
acceleration sensing structure that works according
Sensitivity
2g: 256LSB/g
to the differential capacitance principle.
(calibrated)
4g: 128LSB/g
8g:
The base of Bosch Sensortec‘s micromachining
Resolution
technology has proven its capability in more than 100
Nonlinearity
million Bosch accelerometers and gyroscopes so far.
Axes mixing
Bosch Sensortec‘s modular design methodolgy provi-
Zero-g offset
des a flexibility to react quickly to customer needs for
(calibrated)
additional sensor functionality in the future.
Zero-g offset tempera-
64LSB/g
10bit (±2g range)
4mg
±0.5% FS
2%
±220mg
1mg/K
ture drift
Key features BMA020
Noise
ff Switchable g-range and bandwidth
Bandwidth
ff Low-power consumption
0.5mg/√Hz
25Hz … 1500Hz
(switchable via SPI/I²C)
ff SPI (3-wire/4-wire) and I²C interfaces
Digital input / output
ff Programmable interrupt feature for mobile
Supply voltage
wake-up
SPI & I²C, Interrupt pin
2.0 … 3.6V, 1.62 … 3.6V
IO
ff Ultra-low-power self-wake-up mode
Current consumption
ff Self-test capability
Idle current
1µA
ff LGA package (3 mm x 3 mm x 0.9 mm)
Wake-up time
1ms
ff RoHS compliant
200µA
-40°C … +85°C
Temperature range
* ±1.5g, ±2g or ±8g variants available
