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  ON Semiconductor Electronic Components Datasheet  

SA3291 Datasheet

Preconfigured Wireless DSP System

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SA3291 pdf
AYRE SA3291
Preconfigured Wireless DSP
System for Hearing Aids
Description
Ayret SA3291 is a preconfigured wireless DSP system utilizing
Near−Field Magnetic Induction (NFMI) technology.
Ayre SA3291 enables hearing aids to wirelessly synchronize
program modes and volume control and stream telecoil signals from
one hearing aid to the other. When coupled with a relay device, Ayre
SA3291 enables features such as stereo audio streaming via
Bluetooth® in addition to remote control functionality.
Featuring iSceneDetectt environmental classification, adaptive
noise reduction, superior feedback cancellation, fully automated and
adaptive microphone directionality, and up to 8−channel WDRC, Ayre
SA3291 is ideal for high−end, full−featured wireless products.
Binaural Synchronization − The binaural synchronization feature
allows two hearing aids to wirelessly synchronize adjustments such as
program modes or volume control. By working together as one
system, user control is simplified.
Binaural Telecoil − The binaural telecoil wirelessly streams telecoil
audio signals from one hearing aid to the other. This enables hearing
aid users to hear phone calls in both ears, improving speech
intelligibility.
Stereo Audio Streaming − Stereo audio signals can be streamed
wirelessly from a relay device to hearing aids equipped with Ayre
SA3291. A relay device can use Bluetooth or other far−field wireless
technology to wirelessly connect with TVs, music players, mobile
phones or other audio sources.
Acoustic Environment Classification − The iSceneDetect 1.0
environmental classification algorithm is capable of analyzing the
hearing aid wearer’s acoustic environment and automatically
optimizes the hearing aid to maximize comfort and audibility.
iLog] 4.0 Datalogging − Enables the recording of various hearing
aid parameters such as program selection, volume setting and ambient
sound levels. The sampling interval can be configured to record from
every 4 seconds up to once every 60 minutes. The fitting system can
present the data to help the fitting specialist fine tune the hearing aid
and counsel the wearer.
EVOKE[ Advanced Acoustic Indicators − Allows
manufacturers to provide more pleasing, multi−frequency tones
simulating musical notes or chords to indicate events such as program
or volume changes.
Automatic Adaptive Directionality − The automatic Adaptive
Directional Microphone (ADM) algorithm automatically reduces the
level of sound sources that originate from behind or to the side of the
hearing aid wearer without affecting sounds from the front. The
algorithm can also gather input from the acoustic environment and
automatically select whether directionality is needed or not,
translating into additional current savings.
Adaptive Feedback Cancellation − Automatically reduces
acoustic feedback. It allows for an increase in the stable gain while
minimizing artifacts for music and tonal input signals.
www.onsemi.com
32 PAD
HYBRID
CASE TBD
GND
DAI
VB
GPIO0/
MS1
GPIO1/
MS2
PCSDA
PCCLK
OUT−
PAD CONNECTION
MGND VIN2
20
21
22
19 27
1
2
18 28 3
17 23
4
29
16 24
5
30
15 25
31
14 26
32
13
6
7
8
VIN1
TIN
VREG
VC
GPIO7/
DIGVC
L2
NGND
L1
OUT+ 12 11 10
9 NVB
VBP PGND
(Bottom View)
MARKING DIAGRAM
SA3291A−E1
XXXXXX
SA3291A = Specific Device Code
E1 = RoHS Compliant Hybrid
XXXXXX = Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 17 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
March, 2015 − Rev. 7
1
Publication Order Number:
SA3291/D


  ON Semiconductor Electronic Components Datasheet  

SA3291 Datasheet

Preconfigured Wireless DSP System

No Preview Available !

SA3291 pdf
AYRE SA3291
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.
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
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.
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.
www.onsemi.com
2


Part Number SA3291
Description Preconfigured Wireless DSP System
Maker ON Semiconductor
Total Page 20 Pages
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