PARAGON
™
DIGITAL
Four Channel
DSP System with
F
RONT
W
AVE
®
GB3215/GB3225 PRELIMINARY DATA SHEET
FEATURES
• highly configurable, versatile DSP platform
• high fidelity multi-channel AGC signal processing
• 95dB input dynamic range with HRX™ Headroom
Extension
• fully programmable via serial data interface
• high performance data converters - dual, over-
sampled A/Ds; over-sampled D/A with efficient
switched-mode output power amp
• SOUNDDESIGN™ high-fidelity audio quality
• drives zero-bias 2-terminal receivers
• multiple communication rates up to 85.3kb/s
• thinSTAX™ packaging - CIC size
• multi-memory
• internal/external volume control
• volume control taper determined by external VC
• tri-state memory select operation
• audible memory change indicator
thinSTAX™ PACKAGING
Hybrid typical dimensions:
0.227 x 0.125 x 0.060 in
(5.76 x 3.18 x 1.52 mm)
DESCRIPTION
The GB3215 (GB3225) hybrid is a programmable DSP
system based on a multi-channel compression circuit. It
can be used as a platform for a wide range of hearing aid
applications. Its extensive programmability and compact
size make it ideal for sophisticated CIC applications. The
reflowable thinSTAX™ packaging enables easy integration
into BTE applications. This very versatile DSP hybrid is
capable of multiple configurations and has a wide range of
functions.
The GB3215 hybrid contains the GC5051 controller chip
and the GA3225 hybrid contains the GC5057 controller
chip. The only difference between the GC5051 and the
GC5057 is in their Power On Reset (POR) behaviour.
For a detailed description of the POR behaviour of the
GC5051 and GC5057 controller chips, please refer to
Document
#20143.
The GB3215 and the GB3225 hybrid code programmed
into the GC5051 and the GC5057 controller chips is “9”.
This data sheet is a part of a set of documents available for
this product. Please refer to “Getting
information note for a list of other
documents.
GB3215 / GB3225
VC
4
205n
RREG
FREG
FMIC
7
8
9
70n
A/D
REGULATOR
SDA
3
MS
12
VB
13
GB3215
(GB3225)
13n
VC
A/D
INTERFACE
EEPROM
CHANNEL 1
FRONTWAVE
CHANNEL 2
S
D/A
HBRIDGE
14
OUT+
1
OUT-
70n
RMIC
T
6
A/D
CHANNEL 3
11
60n
CHANNEL 4
FGND
10
RGND
5
2
All resistors in ohms, all capacitors in farads unless otherwise stated.
PGND
BLOCK DIAGRAM
Doc.No. 22735 - 3 [Rev. December 2003]
1 of 6
GENNUM [ GENNUM CORPORATION ]
