GA3284 Datasheet, PDF (5/15 Pages) ON Semiconductor – Pre-configured DSP System

INSPIRIA GA3284
TYPICAL APPLICATIONS
Note: All resistors in ohms and all capacitors in farads, unless otherwise stated.
V_B
1
Voltage
Regulator
15
A/D
3k9
14
3k9
1k
M
A/D
2
U
X
3
1k
16
MIC/
TCOIL
Comp
Programming
12
Interface
Clock
Generator
5
4
Memory
Select
Adaptive
*
Directional
Microphone
**
or
FrontWave
Post
Biquad
Filters
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 (12 bands)
EEPROM
11
* If Input Mode = 1 mic omni, mic + telecoil, mic + DAI
** If Input Mode = 2 mic omni, directional, telecoil, rear mic only, DAI only, adaptive directional.
Figure 2. Test Circuit
V_B
7
OUT
8
LP
9
Filter
10
13
200 k
1
Voltage
Regulator
15
A/D
14
M
2
U
3
X
A/D
MIC/
TCOIL
Comp
16
Programming
12
Interface
Clock
Generator
5
4
Memory
Select
Adaptive
*
Directional
Microphone
**
or
FrontWave
Post
Biquad
Filters
Feedback
Canceller
AGCO
Tone
Generator
Cross
Fader
Volume
Control
Pre
Biquad
Filters
Frequency
Band
Analysis
128 bands
6
POR
Circuitry
Peak
Clipper
D/A
HBridge
Post
Biquad
Filters
Wide−
band
Gain
Frequency
Band
Synthesis
Control
A/D
WDRC (1,2,4 channels)
Noise Reduction (128 bands)
Graphic EQ (12 bands)
EEPROM
11
* If Input Mode = 1 mic omni, mic + telecoil, mic + DAI
** If Input Mode = 2 mic omni, directional, telecoil, rear mic only, DAI only, adaptive directional.
Figure 3. Typical Application Circuit
Knowles or
Microtronic
7 ^{zero−bias}
receiver
8
9
10
13
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5