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SB3230 Datasheet, PDF (1/17 Pages) ON Semiconductor – Preconfigured DSP System | |||
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RHYTHM SB3230
Preconfigured DSP System
for Hearing Aids
Description
The RHYTHMt SB3230 hybrid from ON Semiconductor is
a trimmerâconfigurable DSP system based on a fourâchannel
compression circuit featuring adaptive feedback cancellation and
adaptive noise reduction.
Based on a phase cancellation method, SB3230âs 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 SB3230âs Adaptive Noise Reduction monitors noise levels
independently in 64 individual bands and employs advanced
psychoacoustic models to provide user comfort.
In addition to these adaptive algorithms, SB3230 also supports the
following features: up to four channel WDRC, lowâdistortion
compression limiting, cross fading between audio paths for clickâfree
memory changes, eightâband graphic equalizer, eight configurable
generic biquad filters, programming speed enhancements, inâchannel
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 industryâleading 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
hearingâaid parameters of choice. A Serial Data or I2C Interface
provides full programmability at the factory and in the field.
SB3230 hybrid contains a 256 kbit EEPROM intended for
programmable and trimmer based devices.
Features
⢠Adaptive Noise Reduction
⢠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 Inâsitu Audiometry
⢠Frequency Response Shaping with Graphic EQ
⢠Trimmer Compatibility â Four ThreeâTerminal 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
www.onsemi.com
25 PAD
HYBRID
CASE 127DN
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 OUTâ
7 VBP
MS1 10
9
8
VB
MS2
(Bottom View)
MARKING DIAGRAM
SB3230âE1
XXXXXX
SB3230 = 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, 2014
1
November, 2014 â Rev. 3
Publication Order Number:
SB3230/D
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