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Bosch Sensortec

Acceleration sensor BMA550

Acceleration-based body sound sensor

Acceleration sensor BMA550

Acceleration-based body sound sensor

The BMA550 sensor for hearables makes a big wave against unwanted sound waves. The innovative accelerometer works as body sound sensor for sensing bone conducted voice. Smart “voice enhancement” filters out distracting noises during phone calls and amplifies your own voice. This means that the person you are talking to can always understand you, even in noisy atmospheres. The BMA features 5-7x lower noise than standard accelerometers, low power consumption and high data rate up to 48 kHz for low latency.

Technical data

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

Documents

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Applications and solutions

Woman doing sports using hearables and smartwatch

Wearables & hearables

Smartwatches, wristbands, smart clothes and hearables: whether supporting your fitness through calorie counting or helping you orient yourself through navigation, our accurate and ultra-low power sensing solutions turn a regular wearable into your daily companion!

The BSEC software is only available for download after accepting the software license agreement:

BSEC license agreement
  

You will soon receive an e-mail with the download link.