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RHYTHM SB3231: Preconfigured DSP System for Hearing Aids, with up to 4 WDRC channels

Datasheet: Rhythm SB3231 Pre-configured DSP System for Hearing Aids
Rev. 5 (137kB)
Product Overview
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Rhythm™ SB3231 is a trimmer-configurable DSP system based on a four-channel compression circuit featuring Adaptive Feedback Cancellation, Adaptive Noise Reduction, and Directional Processing.

Based on a phase cancellation method, Rhythm SB3231's adaptive feedback reduction algorithm provides added stable gain to enable extra gain and user comfort. It features rapid adjustment for dynamic feedback situations and resistance to tonal inputs. The directional processing system utilizes a pair of microphones to create a fully customizable static polar pattern, such as bidirectional, cardiod, hyper-cardiod and super-cardiod.

In addition to these adaptive algorithms, Rhythm SB3231 also supports the following features: up to four channel WDRC, low-distortion compression limiting, cross fading between audio paths for click-free memory changes, eight-band graphic equalizer, eight configurable generic biquad filters, programming speed enhancements, in-channel squelch to attenuate microphone and circuit noise in quiet environments, optional peak clipping, flexible compression adjustments, volume control, rocker switch, noise generation for tinnitus treatment, and industry leading security features to avoid cloning and software piracy.

Software Support
ARK is a set of software building blocks that can help reduce the time it takes to develop hearing aid fitting software. ARKonline is an efficient web-based tool for creating product libraries and keeping them organized. To access ARKonline, please go to www.onsemi.com/arkonline.
Features
 
  • Directional Processing
  • Adaptive noise reduction
  • Adaptive feedback cancellation
  • WDRC compression with choice of 1, 2 or 4 channels of compression
  • Auto telecoil with programmable delay
  • EVOKE acoustic indicators
  • Noise generator for tinnitus treatment or in-situ audiometry
  • Frequency response shaping with graphic EQ
  • Trimmer compatibility - four three-terminal trimmers with configurable assignments of control parameters
  • I²C and SDA programming
  • Rocker switch support for memory change and/or volume control adjustment
  • Analog or digital volume control with programmable range
  • High quality 20-bit audio processing
  • High power/high gain capability
  • SOUNDFIT fitting software
  • Configurable low battery indicator
  • 8 biquadratic filters
  • 16 kHz or 8 kHz bandwidth
  • 4 fully configurable memories with audible memory change indicator
  • 96 dB input dynamic range with Headroom Extension
  • 128-bit fingerprint security system and other security features to protect against device cloning and software piracy
  • High fidelity audio CODEC
  • Soft acoustic fade between memory changes
  • Drives zero-bias two-terminal receivers
  • E1 RoHS compliant hybrid
Applications   End Products
  • Digital Audio Processing
 
  • Hearing Aids
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
SB3231-E1 Active
Pb-free
Halide free
RHYTHM SB3231, 25 Units/ Bubble Pack SIP-25 127DN 4 240 BTRAY 25 $39.999
SB3231-E1-T Active
Pb-free
Halide free
RHYTHM SB3231, 250 Units/ Tape & Reel SIP-25 127DN 4 240 Tape and Reel 250 $39.999
Market Leadtime (weeks) : 8 to 12
ON Semiconductor   (2020-09-02) : 750
Market Leadtime (weeks) : 8 to 12
ON Semiconductor   (2020-09-02) : 6,250

Product
Description
Pricing ($/Unit)
Compliance
Status
WDRC Channels
Graphic EQ Bands
Program Modes
Advanced Algorithms
Acoustic Indicators
Other Features
Wireless Standards
Package Type
SB3231-E1  
 $39.999 
Pb
H
 Active   
1
2
4
8
4
Adaptive Feedback Cancellation
Adaptive Noise Reduction
FrontWave Directional Microphone
EVOKE
Digital Volume Control
Software Configurable
Trimmer Support
-
SIP-25
SB3231-E1-T  
 $39.999 
Pb
H
 Active   
1
2
4
8
4
Adaptive Feedback Cancellation
Adaptive Noise Reduction
FrontWave Directional Microphone
EVOKE
Digital Volume Control
Software Configurable
Trimmer Support
-
SIP-25
Case Outlines
127DN   
Packages
RHYTHM SB3231: Preconfigured DSP System for Hearing Aids, with up to 4 WDRC channels
RHYTHM SB3231: Preconfigured DSP System for Hearing Aids, with up to 4 WDRC channels
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