Always-Listening, Voice Trigger Audio DSP System

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Overview

BelaSigna® R281 is an ultra-low-power voice trigger solution for a wide range of consumer electronic devices. In a typical application, BelaSigna R281 is "always listening" and will detect a single, user-trained trigger phrase, asserting a wake-up signal when this trigger phrase is detected.

"Always-on" key phrase detection with an average power consumption of less than 300 uW (not including the power consumption of the microphone) preserves Standby battery life.

BelaSigna R281 is an ultra-miniature solution that is available in both a 5 mm x 5mm QFN32 package and a 2.42 mm x 2.74 mm WLCSP package. It can be designed onto a single layer PCB with 4 mil routing and with a minimal amount of external components.

An external, I2C host controller is required to configure the device for operation.

Please note that this part is not recommended for new designs.

  • "Always Listening" Hands-Free Voice Trigger
  • Smartphones
  • Tablets
  • Wearables
  • Smart Watches
  • Portable Electronic Devices
  • Personal Communication Devices
  • Any device with an extremely low-power sleep mode which could benefit from "always listening" voice trigger technology
  • Ultra-Low-Power
  • Superior Performance
  • Mixed-Signal
  • Easy Design-In

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Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

DSP Core (bits)

Coprocessor Type

MIPS

Dynamic Range (dB)

RAM (kB)

Istandby Typ (µA)

Audio Inputs

Audio Outputs

Reference Price

BR281Q32A101V1G

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Obsolete

CAD Model

Pb

A

H

P

QFN-32

3

260

REEL

5000

N

16

WOLA

60

-

-

160

1

0

Price N/A

More Details

BR281W31A101V1G

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Lifetime

CAD Model

Pb

A

H

P

WLCSP-31

1

260

REEL

2500

N

16

WOLA

60

-

-

170

1

0

Price N/A

More Details

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