SA3291 datasheet(2/20 Pages) ONSEMI

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AYRE SA3291

www.onsemi.com

Adaptive Noise Reduction − The Ayre SA3291 adaptive

noise

reduction

algorithm

monitors

noise

levels

independently in 128 individual bands and employs

advanced psychoacoustic models to provide user comfort.

Tinnitus Masking − The Ayre SA3291 is equipped with

a noise source that can be used to mask tinnitus. The noise

can be shaped and attenuated and then summed into the

audio path either before or after the volume control.

In−situ Tone Generator − The narrow−band noise

stimulus feature can be used for in−situ validation of the

hearing aid fitting. The frequency, level and duration of the

stimuli are individually adjustable.

Other Key Features – Ayre SA3291 also supports the

following features: FRONTWAVE® directional processing,

built−in feedback path measurement, cross fading between

audio paths for click−free program changes, 16−band

graphic equalizer, 8 generic biquad filters (configurable as

parametric or other filter types), programming speed

nhancements, optional peak clipping, flexible ompression

adjustments, direct interfaces to analog or digital volume

control, rocker switch, direct audio input and telecoil. Ayre

SA3291 also encompasses industry−leading security

features to avoid cloning and software piracy.

Features

• Wireless:

♦ Complete NFMI Wireless Transceiver of

Bi−directional Transmission

♦ Channel Rate of 298 kbps

♦ Wireless Data Transfer

♦ CROS/BiCROS

♦ Relay Device Reference Design Available

• Advanced Research Algorithms:

♦ iSceneDetect Environmental Classification

♦ Automatic Adaptive Directional Microphones

(ADM)

♦ FrontWave Directionality

♦ 128−band Adaptive Noise Reduction

♦ Adaptive Feedback Cancellation (AFC)

• Streaming Stereo and Mono Audio

• iLog 4.0 Datalogging

• Tinnitus Masking Noise Generator

• Evoke Acoustic Indicators

• Auto Telecoil with Programmable Delay

• 1, 2, 4, 6 or 8 Channel WDRC

• Feedback Path Measurement Tool

• AGC−O with Variable Threshold, Time Constants, and

Optional Adaptive Release

• 16−band Graphic Equalizer

• Narrow−band Noise Stimulus

• SDA or I2C Programming

• 8 Biquadratic Filters

• 4 Analog Inputs

• 16 kHz or 8 kHz Bandwidth

• 6 Fully Configurable Memories with Audible Memory

Change Indicator

• 96 dB Input Dynamic Range with HRX Headroom

Extension

• 28−bit Fingerprint Security System and Other Security

Features to Protect Against Device Cloning and

Software Policy

• High Fidelity Audio CODEC

• Soft acoustic Fade Between Memory Changes

• Drives Zero−bias 2−terminal Receivers

• Internal or External Digital Volume Control with

Programmable Range

• Rocker Switch Support

• 20−bit Audio Processing

• thinSTAX® Packaging

• E1 RoHS Compliant Hybrid

thinSTAX Packaging

Hybrid typical dimensions:

0.250 x 0.145 x 0.065 in.

(6.35 x 3.68 x 1.65 mm)

1. Nominal dimensions of Hybrid only; height of solder bump not

included.

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