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, I
C host controller is required to configure the device for operation.

• Ultra-Low-Power

• Superior Performance

• Mixed-Signal

• Easy Design-In

Key Features 

Proven Ultra?Low?Power Digital Signal Processing (DSP) Technology 

? Audio DSP Technology Originally Developed for Hearing Aids Offers the Required Computational Power at Extremely Low Current Consumption 

? < 300 W Average Current Consumption (not including microphone) Mixed?Signal System?on?Chip (SoC) 

? Audio?grade, Analog Input with Onboard Pre?amplifier 

? Built?in, Regulated Voltages Including Onboard Microphone Bias for Power Efficient Operation 

? Supports Analog or Digital Microphone Input Interfaces and Peripherals 

? I2C?based Device Configuration and Control

 ? GPIO Wake Signal 

? Internal Oscillator Applications 

? Mobile Phones

 ? Tablets 

? Portable Electronic Devices

 ? Wearables ? Toys