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PDF GA3219 Data sheet ( Hoja de datos )
| Número de pieza | GA3219 | |
| Descripción | Pre-configured DSP System | |
| Fabricantes | ON Semiconductor | |
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VENTURE GA3219
Pre-configured DSP System
for Hearing Aids
Description
VENTURE GA3219 combines the power capabilities of an
advanced platform with advanced research, delivering cutting-edge
features and high performance.
This hardware platform is ON Semiconductor’s industry−leading
programmable digital signal processing platform. Adaptive
Algorithms is a methodology developed by ON Semiconductor that
couples state−of−the−art acoustic algorithms to ensure high−fidelity
digital sound quality.
Venture GA3219’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 GA3219’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 GA3219 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.
Features
• Adaptive Algorithms:
♦ 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
• 95 dB Input Dynamic Range with HRXt Headroom Extension
• 1, 2 or 4 Channel WDRC Compression
• 8−Band Graphic EQ
• Eight Biquadratic Filters
• Drives Zero−Bias 2−Terminal Receivers
• Four Analog Inputs
• Two Memory Select Pads
www.onsemi.com
16 PAD
HYBRID
CASE TBD
FMIC
PAD CONNECTION
MGND
15 16
1
VREG
RMIC
14
2 TIN
VC
SDA
13
12
GND
11
PGND
10
3 DAI
4 MS
5 MS2
6 VB
98
7
OUT+ OUT−
(Bottom View)
VBP
MARKING DIAGRAM
GA3219D−E1
XXXXXX
GA3219D
E1
XXXXXX
= Specific Device Code
= RoHS Compliant Hybrid
= Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 12 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
August, 2015 − Rev. 4
1
Publication Order Number:
GA3219/D
1 page  
VENTURE GA3219
TYPICAL APPLICATIONS
VB
1
Voltage
Regulator
15 A/D
3k9
14 MIC/
3k9 M A/D TCOIL
2U
Comp
1k 3 X
1k
16
12
Programming
Interface
Clock
Generator
54
Memory
Select
Post
Biquad
Filters
FrontWave
Feedback
Canceller
AGCO
Pre
Biquad
Filters
Frequency
Band
Analysis
128 bands
Tone
Generator
Cross
Fader
Volume
Control
6
POR
Circuitry
Peak
Clipper
D/A
HBridge
Post
Biquad
Filters
Wideband
Gain
Frequency
Band
Synthesis
Control
A/D
WDRC (1,2,4 channels)
Noise Reduction (128 bands)
Graphic EQ (8 bands)
EEPROM
7
OUT
8 LP
9 Filter
10
13
200 k
Note: All resistors in ohms and all capacitors in farads, unless otherwise stated.
11
Figure 2. Test Circuit
VB
1
Voltage
Regulator
15
14
M
2U
X
3
A/D
A/D
MIC/
TCOIL
Comp
16
12
Programming
Interface
Clock
Generator
54
Memory
Select
Tone
Generator
Post
Biquad
Filters
Cross
Fader
6
POR
Circuitry
Peak
Clipper
D/A
HBridge
FrontWave
Pre
Biquad
Filters
Feedback
Canceller
AGCO
Volume
Control
Post
Biquad
Filters
Wide−
band
Gain
Control
A/D
Frequency
Band
Analysis
128 bands
Frequency
Band
Synthesis
WDRC (1,2,4 channels)
Noise Reduction (128 bands)
Graphic EQ (8 bands)
EEPROM
Knowles or
Sonion
7 zero−bias
receiver
8
9
10
13
11
Figure 3. Typical Application Circuit
www.onsemi.com
5
5 Page 
VENTURE GA3219
(if enabled), and after switching to the next memory, the
audio signal is faded back in. The memory switch fader is
also used when turning the Tone Generator on or off, and
during SDA programming.
Power−On/Power−Off Behaviour and Low Battery
Indicator
During power−on, the Venture GA3219 hybrid is held in
a reset state until the supply voltage (Vb) reaches a turn−ON
threshold. A small portion of the hybrid’s internal control
logic turns on and monitors the voltage to determine if the
supply is stable. Once the supply is stable, the entire hybrid
is activated and loads its configuration. Finally, the audio
output turns on by smoothly transitioning to the expected
output level.
During normal operation, when a low battery condition is
detected, the Venture GA3219 hybrid sends out a series of
one to seven beeps (each beep is 512 ms ON and 512 ms
OFF) to indicate the battery is low. This is repeated every
five minutes until the device reaches the turn−OFF
threshold. The low battery threshold is programmable in
IDS between 1.0 V and 1.2 V in 10 mV increments.
If Vb drops below the turn−OFF threshold, then the
Venture GA3219 hybrid is returned to its reset state and the
audio output is muted. After a reset due to a low battery or
a sudden supply transient, the recovery behaviour of the
Venture GA3219 is determined by the selectable reset mode
through ARKonline.
There are four selectable reset modes as follows:
• Shallow−reset mode − After a low battery shutdown or
transient shutdown, it allows the Venture GA3219
hybrid to immediately restart when the supply voltage
rises above the turn−ON threshold. The device restarts
in the memory that was last active when the shut down
occurred. In summary, the device functions until the
supply voltage drops below the turn−OFF threshold,
and recovers when the device rises above the turn−ON
threshold again.
• Deep−reset mode − After a low battery shutdown or
transient shutdown, it does not allow the Venture
GA3219 hybrid to restart. When a shutdown occurs
(i.e., the supply voltage drops below the turn−OFF
threshold), the device remains off until the supply
voltage drops below approximately 0.3 V and
subsequently rises above the turn−ON threshold. For
the supply to drop below 0.3 V, the battery should be
disconnected. Upon reconnecting the battery
(preferably a new battery) the supply voltage rises
above the turn−ON threshold, and depending if the
supply is stable, the device restarts.
• Mixed mode − A combination of the first two modes.
The device starts up in shallow−reset mode initially,
then transitions to deep reset mode after five minutes.
• Advanced reset mode (recommended) − A more
advanced combination of the first two modes, plus
some additional intelligence. The device starts up in
shallow−reset mode initially, so that after a low battery
shutdown or a transient shutdown, the device
immediately restarts when the supply voltage rises
above the turn−ON threshold. When the device restarts,
deep−reset mode is applied and the device operates in
the memory that was last active when the shut down
occurred. Additionally, the maximum output level is
reduced through a 2 dB reduction of the AGC−O and
peak clipper. This operating condition is defined as
transient reboot mode. The device operates in transient
reboot mode (i.e., deep−reset mode and maximum
output reduction are applied) while monitoring the
supply voltage. If the supply voltage remains above the
turn−ON threshold for at least 30 secs, the device is
allowed to exit transient reboot mode. The device
returns to shallow−reset mode and the maximum output
is restored.
Generally, any low battery shutdown or transient
shutdown that occurs while in shallow−reset mode (or while
in the shallow−reset mode component of mixed mode or
advanced reset mode) results in the Venture GA3219 hybrid
restarting into the memory that was last active when the shut
down occurred. The Venture GA3219 hybrid has this
memory restart capability for up to three memories. A restart
in any memory beyond the first three memories causes the
device to restart in the initial memory, similar to the
behaviour when a battery is first connected. The transient
reboot mode described above also applies to up to three
memories. Any additional memories would use the
shallow−reset mode behaviour, and would restart in the
initial memory after a shutdown.
In any of the above reset modes, the Venture GA3219
hybrid can be configured through ARKonline to reduce the
gain as the battery voltage drops. When the supply voltage
falls below the low battery threshold, low battery tones are
emitted and the wideband gain is reduced by 3 dB. As the
battery voltage continues to drop, the low battery tones
continue and the wideband gain continues to be reduced.
Once the turn−OFF threshold is reached, the device shuts
down.
Software and Security
Venture GA3219 incorporates the following security
features to protect the device from cloning and against
software piracy:
• DLL protection by password − prevents a third party
from using IDS to reconfigure parts.
• Hybrid authentication by 128−bit fingerprint to identify
parts in application software − prevents a third party
from cloning a device’s EEPROM because the
fingerprint cannot be overwritten. Special functions can
be used in fitting software to reject parts that do not
match the expected fingerprint. This would prevent the
piracy of fitting software.
• DLL to hybrid pairing by using a software key in ARK
to match product libraries with client software − a part
www.onsemi.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GA3219.PDF ] | |
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