GENERAL DESCRIPTION

The BMA455 is an ultra-small, triaxial, low-g high performance

acceleration sensor with digital interfaces, aiming for low-power

and demanding consumer electronics applications. Featuring

16 bit digital resolution and embedded intelligence, the BMA455

allows low-noise measurement of accelerations in 3 perpen-

dicular axes and thus senses significant motion, tilt and enables

plug ’n’ play step counting at low current consumption in smart

phones without an additional sensor hub. Furthermore the

device is optimized to fulfill Android low power accelerometer

requirements. The superior temperature behaviour of BMA455

facilitate accurate measurements over changing temperature.

The reduced height of only 0.65 mm is beneficial for low profile

smart phones.

SENSOR FEATURES

With its embedded intelligence BMA455 is unique in the class of

consumer grade accelerometers for smart phones, wearable

devices and toys and gadgets. The embedded intelligence

enables low current step-counting at 25 µA. On top, the BMA455

integrates a multitude of other features (e.g. tilt, significant

motion etc.) that facilitate its use especially in the area of

Android based smart phones, to fulfill the newest Android M

accelerometer requirements. Featuring a high performance

measurement mode with low pass filters and a current

consumption of only 150 μA the BMA455 is robust to vibrations

and aliasing. In low-power mode operation the current

consumption can be even further reduced by more than one

order of magnitude. This fulfills the current consumption

requirements for always-on applications. The BMA455 is highly

configurable in order to give the designer full flexibility when

integrating the sensor into the system.

TECHNICAL SPECIFICATIONS

BMA455 Technical data

Digital resolution

16 bit

Resolution

(in ±2g range)

0.06 mg

Measurement ranges

(programmable)

±2 g; ±4 g; ±8 g; ±16 g

Sensitivity

(calibrated)

±2 g:

16384 LSB/g

±4 g:

8192 LSB/g

±8 g:

4096 LSB/g

±16 g:

2048 LSB/g

Zero-g offset

(typ., over life-time)

±20 mg

Noise density (typ.)

120 µg/√Hz

Output data rate

(programmable)

1600 Hz … 1.5 Hz

Digital inputs/outputs

2x digital interrupt pins

1.62 … 3.6 V

1.2 … 3.6 V

Temperature range

-40 … +85 °C

Current consumption

– full operation

– low-power mode

150 µA

13 µA (@ 50 Hz data rate)

Large FIFO data buffer

1 kb

LGA package

Shock resistance

10,000 g x 200 µs

Bosch Sensortec

BMA455

Intelligent, triaxial acceleration sensor

BMA455 TARGET APPLICATIONS

 Step counting

 Significant motion

 Tilt detection

 Low power user interaction

 Advanced gesture recognition

 Activity recognition/tracking

 Advanced power management for mobile devices

 Shock and freefall detection

 Tilt compensation for electronic compass

 Spirit leveling / Virtual horizon