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ON Semiconductor - Preconfigured DSP System

Numéro de référence SA3229
Description Preconfigured DSP System
Fabricant ON Semiconductor 
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SA3229 fiche technique
RHYTHM SA3229
Preconfigured DSP System
for Hearings Aids
Description
The RHYTHMt SA3229 hybrid from ON Semiconductor is
a trimmer−configurable DSP system based on a four−channel
compression circuit featuring a feedback cancellation algorithm.
Based on a phase cancellation method, SA3229’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.
In addition to these adaptive algorithms, SA3229 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.
A trimmer interface supports manual circuit configuration. It
continuously monitors trimmer positions and translates them into
the hearing−aid parameters of choice. A Serial Data or I2C Interface
provides full programmability at the factory and in the field.
RHYTHM SA3229 is a single−chip hybrid with a one−time
programmable (OTP) memory intended for low cost applications
requiring high gain.
Features
Adaptive Feedback Cancellation
WDRC Compression with Choice of 1, 2 or 4 Channels of
Compression
Auto Telecoil with Programmable Delay
EVOKE LITEt 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
Support for Active High or Active Low Switching
Analog or Digital Volume Control with Programmable Range
High Quality 20−bit Audio Processing
High Power/High Gain Capability
Configurable Low Battery Indicator
www.onsemi.com
SIP25
HYBRID
CASE 127DZ
PAD CONNECTION
VIN2 17
TIN 16
DAI 15
VC 14
D_VC 13
SDA 12
CLK 11
18
VIN1
19
TR4
20
TR3
21
TR2
22
TR1
23
N/C
25 24
1 VREG
2 MGND
3 GND
4 PGND
5 OUT+
6 OUT−
7 VBP
MS1 10
9
8
MS2
(Bottom View)
VB
MARKING DIAGRAM
SA3229−E1
XXXXXX
SA3229 = Specific Device Code
E1 = RoHS Compliant Hybrid
XXXXXX = Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
© Semiconductor Components Industries, LLC, 2016
May, 2016 − Rev. 0
1
Publication Order Number:
SA3229/D

PagesPages 16
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