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What is GA3285?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "Preconfigured DSP System".


GA3285 Datasheet PDF - ON Semiconductor

Part Number GA3285
Description Preconfigured DSP System
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 


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INSPIRIA GA3285
Pre-configured DSP System
for Hearing Aids
Description
The INSPIRIA GA3285 is ON Semiconductor’s premiere DSP
product designed on an advanced hardware platform. Combining the
power and capabilities of the hardware platform together with
Advanced Research, the Inspiria GA3285 delivers cuttingedge
features and high performance.
The hardware platform is ON Semiconductor’s industryleading
programmable digital signal processing platform. Advanced
Research, developed by ON Semiconductor, is a methodology that
couples stateoftheart acoustic algorithms to ensure highfidelity
digital sound quality.
The Inspiria GA3285 iLogt Datalogging feature records various
parameters every 15 minutes during use of the device. Once these
parameter values are read from the device, they can be used to counsel
the user and fine tune the fitting.
The Inspiria GA3285’s Adaptive Noise Reduction monitors noise
levels independently in 128 individual bands and employs advanced
psychoacoustic models to provide user comfort.
Based on a phase cancellation method, Inspiria GA3285’s adaptive
feedback reduction algorithm provides an increase in added stable
gain. It features rapid adjustment for dynamic feedback situations and
resistance to tonal inputs.
ON Semiconductor’s Automatic Adaptive Directional Microphone
(ADM) algorithm is a twomicrophone processing scheme. The
algorithm automatically reduces the level of sound sources that
originate from behind or the side of the hearingaid wearer without
affecting sounds from the front by adjusting the null in the microphone
polar pattern to minimize the noise level at the output of the ADM. To
reduce current consumption, the algorithm can switch automatically
between 1 mic omni and ADM depending on the acoustic
environment.
The Inspiria GA3285 is equipped with a noise source that can be
used in treating tinnitus. The Tinnitus Treatment noise can be shaped
and attenuated and then summed into the audio path either before or
after the volume control.
The Narrowband Noise Stimulus feature allows the user to
generate stimuli from the device that can be used for in situ
audiometry.
In addition to these adaptive algorithms, the Inspiria GA3285 also
supports the following features: up to 8 channel WDRC,
FRONTWAVE® directional processing, cross fading between audio
paths for clickfree memory changes, 16band 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, volume control, and industryleading
security features to avoid cloning and software piracy.
www.onsemi.com
16 PAD
HYBRID
CASE TBD
FMIC
RMIC
VC
SDA
GND
PGND
PAD CONNECTION
MGND
15 16
1
14 2
13 3
12
4
11
5
10
6
98
7
OUT+ OUT
(Bottom View)
VREG
TIN
DAI
MS
MS2
VB
VBP
MARKING DIAGRAM
GA3285AE1
XXXXXX
GA3285A = Specific Device Code
E1 = RoHS Compliant Hybrid
XXXXXX = Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 14 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
August, 2015 Rev 3
1
Publication Order Number:
GA3285/D

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GA3285 equivalent
INSPIRIA GA3285
TYPICAL APPLICATIONS
VB
1
Voltage
Regulator
15 A/D
3k9
3k9
1k
1k
14
2
3
16
M
U
X
A/D
MIC/
TCOIL
Comp
12
Programming
Interface
Clock
Generator
54
Memory
Select
Adaptive
Directional
Microphone
or
FrontWave
*
**
Post
Biquad
Filters
Feedback
Canceller
AGCO
Pre
Biquad
Filters
Frequency
Band
Analysis
128 bands
Tone
Generator
6
POR
Circuitry
Σ Cross
Peak
D/A
Fader
Clipper
HBridge
Noise Generator
and Shaper
7
8
9
10
OUT
LP
Filter
Volume
Control
Σ
Wide
band
Gain
Post
Biquad
Filters
Frequency
Band
Synthesis
Control
A/D
200 k
13
Data
Logging
WDRC (1,2,4,6 or 8 channels)
Noise Reduction (128 bands)
Graphic EQ (16 bands)
EEPROM
* If Input Mode = 1 mic omni, mic + telecoil, mic + DAI
11
** If Input Mode = 2 mic omni, rear only, directional
Note: All resistors in ohms and all capacitors in farads, unless otherwise stated.
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
6
Memory
Select
Adaptive
Directional
Microphone
or
FrontWave
*
**
Post
Biquad
Filters
Feedback
Canceller
AGCO
Tone
Generator
S Cross
Fader
POR
Circuitry
Peak
Clipper
D/A
HBridge
Noise Generator
and Shaper
Volume
Control
S
Wide
band
Gain
Control
A/D
Pre
Biquad
Filters
Environmental
Classification
Post
Biquad
Filters
Knowles or
Microtronic
7 zerobias
receiver
8
9
10
13
Frequency
Band
Analysis
128 bands
Frequency
Band
Synthesis
Data
Logging
WDRC (1,2,4,6 or 8 channels)
Noise Reduction (128 bands)
Graphic EQ (16 bands)
EEPROM
* If Input Mode = 1 mic omni, mic + telecoil, mic + DAI
11
** If Input Mode = 2 mic omni, rear only, directional
Note: All resistors in ohms and all capacitors in farads, unless otherwise stated.
Figure 3. Typical Application Circuit
www.onsemi.com
5


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