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GA3219 / GA3218 / GA3217
VentureTM Digital DSP System
GA3219 / GA3218 / GA3217 Preliminary Data Sheet
Proprietary and Confidential
32718 - 2
February 2005
1 of 24
Features
SoundDesignTM Advanced Research
128-band adaptive noise reduction
adaptive feedback cancellation
128-bit fingerprint security system and other
security features to protect against device cloning
and software piracy
soft acoustic fade between memory changes
FRONTWAVE directional processing
high fidelity audio CODEC
20-bit audio precision
95dB input dynamic range with HRXTM Headroom
Extension
1, 2 or 4 channel WDRC compression
8-band graphic EQ
8 biquadratic filters
drives zero-bias 2-terminal receivers
4 analog inputs
4 fully configurable memories with audible memory
change indicator
2 memory select pads
internal or external volume control
AGCo with variable threshold, time constants, and
optional adaptive release
16kHz or 8kHz bandwidth
optimized programming speed
thinSTAXTM packaging
thinSTAX PACKAGING
Hybrid typical dimensions:
0.215 x 0.124 x 0.065in.
5.46 x 3.15 x 1.65mm
Description
Venture is Gennum's premiere DSP product designed
on the VoyageurTM platform. Combining the power and
capabilities of Voyageur together with SoundDesign
Advanced Research, Venture delivers cutting-edge
features and high performance.
Voyageur is Gennum's industry-leading programmable
digital signal processing platform. SoundDesign
Advanced Research is a Gennum developed
methodology that couples state-of-the-art acoustic
algorithms to ensure high-fidelity digital sound quality.
Venture's adaptive noise reduction preserves perceived
speech levels without causing distortion. It monitors
noise levels independently in 128 individual bands. This
strategy also employs advanced psychoacoustic
models to eliminate audible noise and reduce the
amount of perceptible artifacts introduced by the noise
reduction process.
Based on a phase cancellation method, Venture's
adaptive feedback reduction algorithm provides
increased maximum stable gain unlike other feedback
strategies. Additionally, it features rapid adjustment for
dynamic feedback situations and resistance to tonal
inputs.
In addition to these adaptive algorithms, Venture also
supports the following features: FRONTWAVE
directional processing, cross fading between audio
paths for click-free memory changes, 8-band graphic
equalizer, 8 generic biquad filters (configurable as
parametric or other filter types), programming speed
enhancements, optional peak clipping, flexible
compression adjustments, programmable tones for
memory change and low battery indicators, wideband
gain, volume control and industry-leading security
features to avoid cloning and software piracy.
Available Venture configurations:
GA3219: Adaptive noise reduction and adaptive
feedback canceller
GA3218: Adaptive noise reduction
GA3217: Adaptive feedback canceller
GA3219 / GA3218 / GA3217 Preliminary Data Sheet
Proprietary and Confidential
32718 - 2
February 2005
3 of 24
Contents
Features ........................................................................................................................1
thinSTAX PACKAGING.................................................................................................1
Description ....................................................................................................................1
1. Pad Connection.........................................................................................................4
2. Absolute Maximum Rating ........................................................................................4
3. Electrical Characteristics...........................................................................................5
4. Typical Applications ..................................................................................................7
5. Venture Overview......................................................................................................9
6. Signal Path..............................................................................................................10
7. Functional Block Description...................................................................................11
7.1 Adaptive Feeback Canceller .........................................................................11
7.2 Adaptive Noise Reduction .............................................................................11
7.3 A/D and D/A Converters ...............................................................................12
7.4 HRX Head Room Expander ..........................................................................12
7.5 FRONTWAVE Directionality .........................................................................12
7.6 Channel Processing ......................................................................................13
7.7 Telecoil Path .................................................................................................14
7.8 Graphic Equalizer .........................................................................................14
7.9 Biquad Filters ................................................................................................14
7.10 Volume Control ...........................................................................................15
7.11 AGCo and Peak Clipper ..............................................................................15
7.12 Memory Select Switches .............................................................................16
7.12.1 Momentary Switch on MS..................................................................16
7.12.2 Momentary Switch on MS, Static Switch on MS2
(jump to last memory) ...................................................................................16
7.12.3 Static Switch on MS and MS2 ...........................................................17
7.12.4 Static Switch on MS, Static Switch on MS2
(jump to last memory) ...................................................................................17
7.13 Audible Memory Change Indicator ..............................................................18
7.14 Tone Generator ...........................................................................................19
7.15 Cross Fader ................................................................................................19
7.16 Power-On/Power-Off Behavior and Low Battery Indicator ..........................19
7.17 Software And Security ................................................................................21
7.18 SDA Communication ...................................................................................21
7.19 Power Management ....................................................................................21
8. Package Dimensions ..............................................................................................22
8.1 Pad Location .................................................................................................23
9. Revision History ......................................................................................................24
GA3219 / GA3218 / GA3217 Preliminary Data Sheet
Proprietary and Confidential
32718 - 2
February 2005
4 of 24
1. Pad Connection
Figure 1-1: Pad Connection
2. Absolute Maximum Rating
VREG
TIN
DAI
MS
MS2
VB
VBP
OUT-
OUT+
PGND
GND
SDA
VC
RMIC
FMIC
MGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Parameter
Value
Operating Temperature Range
0C to 40C
Storage Temperature Range
-20C to 70C
Absolute Maximum Power Dissipation
25mW
Maximum Operating Supply Voltage
1.5VDC
Absolute Maximum Supply Voltage
2VDC
GA3219 / GA3218 / GA3217 Preliminary Data Sheet
Proprietary and Confidential
32718 - 2
February 2005
5 of 24
3. Electrical Characteristics
Table 3-1: Electrical Characteristics
Conditions: V
BAT
= 1.25V Temperature = 25C
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Hybrid Current
I
AMP
With adaptive features
8kHz bandwidth
925
A
I
AMP
With adaptive features
16kHz bandwidth
1150
A
Minimum Operating Supply Voltage
V
BOFF
Ramp down
0.93
0.95
0.97
V
Supply Voltage Turn On Threshold
V
BON
Ramp up
1.06
1.1
1.16
V
EEPROM Burn Cycles
100k
cycles
Low Frequency System Bandwidth
125
Hz
High Frequency System Bandwidth
32kHz sampling rate
16
kHz
Total Harmonic Distortion
THD
V
IN
= -40dBV
1
%
THD at Maximum Input
THD
M
V
IN
= -15dBV, HRX - ON
3
%
Clock Frequency
f
clk
1.945
2.048
2.151
MHz
Regulator
Regulator Voltage
V
REG
0.87
0.90
0.93
V
Input
Input Referred Noise
IRN
Bandwidth 100Hz - 8KHz
-106
dBV
Input Impedance
Z
IN
16
k
Anti-aliasing Filter Rejection
=
CLK
- 8kHz, V
IN
= -40dBV
80
dB
Maximum Input Level
-15
dBV
Input Dynamic Range
HRX - ON Bandwidth 100Hz - 8KHz
95
dB
A/D Dynamic Range
Bandwidth 100Hz - 8KHz
86
dB
Output
D/A Dynamic Range
83
dBV
Output Impedance
Z
OUT
15
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