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器件描述：FOUNDATION-TM Digital Single or Dual Channel DSP Compression System
器件厂商：GENNUM [Gennum Corporation]
厂商主页：http://www.gennum.com
文件大小：233.49KB
文件页数：14
PDF阅读：GA3216.pdf (点击阅读器件资料)
摘要：
GA3216 PRELIMINARY DATA SHEET
GA
32
16
Doc.No.24501 - 3 [Rev. February 2004] 1 of 14
FEATURES
? efficient, high fidelity 1 or 2-channel WDRC signal
processing
fully programmable via serial data interface
SOUNDDESIGN? high-fidelity audio quality
four trimmer inputs plus volume control
flexible trimmer/parameter assignments
optional two-terminal or three-terminal trimmers
choice of wideband or independent 2-channel level
detection
choice of two strategies for AGC-I parametric
adjustment
6, 12 or 24 dB/octave band split filter or configurable
as single-channel compressor.
in-channel, low level squelch control (1:2 expansion)
output compression limiting (AGC-O)
flexible pre- and post-emphasis filters
four independent memories
pulse-density-modulated output stage drives zero-
bias 2-terminal receivers
thinSTAX? PACKAGING
Hybrid typical dimensions:
0.190 x 0.123 x 0.060in
(4.82 x 3.12 x 1.52mm)
DESCRIPTION
The GA3216 hybrid is a trimmer-configurable DSP system
based on a two-channel compression circuit. It can
efficiently replace traditional hearing-aid compression
circuits without compromising fundamental performance
requirements.
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
interface provides full programmability both at the factory
and in the field.
The GA3216 includes in-channel squelch to attenuate
microphone and circuit noise in quiet environments. It also
includes low-distortion compression limiting and
programmable high and low cut filters as well as five
configurable equalization filters. Unused blocks can be
powered down to save battery current, for example, when
using the device in single-channel mode.
The GA3216 Hybrid code programmed into the GC5020
controller chip is '1'.
This datasheet is part of a set of documents available for
this product. Please refer to Getting Started with Foundation
Digital, document #25786 for a list of other documents.
BLOCK DIAGRAM
MGND
GND1
IN
T
VREG
SDAMSMS2
TR4TR3TR2TR1VC
VB
GND2
PGND
OUT -
OUT+
VBP
VREG2
A/D
SQUELCH
SQUELCH
HP
LP
TRIMMER INTERFACE
24db/oct
BAND SPLIT
FILTER
COMPRESSOR
COMPRESSOR
PROGRAMMING
INTERFACE
EEPROM
REGULATOR
TWIN DETECTOR
PEAK
CLIPPING
D/A
HBRIDGE
TONE
GENERATOR
GA3216
EQ1
EQ2
EQ5
VC GAINEQ3
AGC-O
TWIN DETECTOR
EQ4
T-coil EQ
1st or 2nd
ORDER
1st to 3rd
ORDER
LC
HC
TWIN DETECTOR
TWIN DETECTOR
Σ
19
14 13 12
1
16
17
15
205 23418 6
7
9
8
10
11
FOUNDATION? Digital
Single or Dual Channel
DSP Compression System
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