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Bosch Sensortec
Acceleration-based body sound sensor

Acceleration sensor: BMA550

The BMA550 sensor for hearables makes a big wave against unwanted sound waves. The innovative accelerometer works as body sound sensor for sensing bone conductedvoice. The smart function “voice enhancement” filters out distracting noises during phone calls and amplifies your own voice.

  • Easy-to-integrate
  • Enhanced speech processing
  • Always-on low-power speech processing

Contact us for more information on BMA550

If you are interested in our acceleration sensor BMA550, please use our contact form.

Please be aware that we can only consider information requests for projects with a minimum lifetime quantity of 100,000 units and above.

Easy-to-integrate due to small size icon

Easy-to-integrate due to small size

Enhanced speech processing icon

Enhanced speech processing

Continuously usable due to always-on low-power speech processing icon

Continuously usable due to always-on low-power speech processing

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Technical data

Package dimensions (typ.)
2 x 2 x 0.65 mm³
Digital Resolution
16 bit
Supply voltage VDDIO
Supply voltage VDD
1.08 … 3.6 V
1.71 … 3.6 V
Interface
TDM interface + I2C
Output data rate
Up to 48 kHz
Bandwidth
50 Hz … 2350 Hz
Noise (in low noise mode)
1.2 mg-rma @2350 Hz BW
Total Harmonic Distortion +Noise
0.25%
Power consumption
290 µA in low noise mode
104 µA in low power mode
FIFO
1kb
Interrupts
FIFO + Voice activity detection

Documents

BST-BMA550-FL000

Flyer

BST-BMA550-FL000

Download

Applications and solutions

Other Accelerometers

BMA456

BMA456

The BMA456 is an ultra-small, triaxial, low-g high performance acceleration sensor with digital interfaces. The sensor is suitable for low-power and demanding consumer electronics applications. It detects wrist tilt, tab/double tab and enables plug ’n’ play step counting especially in wearable devices.
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CGI of the Bosch Sensortec Accelerometer BMA400

BMA400

The BMA400 is an ultra-low power acceleration sensor for wearables and smart home applications that need a long-lasting battery lifetime. The BMA400 draws ten times less current than existing accelerometers while delivering solid high performance.
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