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.
Easy-to-integrate due to small size
Enhanced speech processing
Continuously usable due to always-on low-power speech processing
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
|
