GENNUM CORPORATION P.O. Box 489, Stn A, Burlington Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
Web Site: www.gennum.com E-mail: hipinfo@gennum.com
FEATURES
low & high frequency gain adjustment
adjustable high frequency compression ratio
(1:1 to 4:1)
fixed low frequency compression ratio (3:1)
twin average detectionTM
24dB/octave band split filter
8:1 output compression limiting
notch filter to minimize acoustic feedback
pre & post emphasis circuitry
low level squelch control (1:2 expansion)
multi memory (4)
8 programmable parameters
thinSTAXTM PACKAGING
Hybrid typical dimensions:
0.200 x 0.128 x 0.060in.
(5.08 x 3.25 x 1.52mm)
DESCRIPTION
The GA3203 programmable hybrid is composed of a
DynamEQ
III Wide Dynamic Range Compression signal
processor and the GP523 controller memory chip.
The hybrid has 8 programmable parameters including Low
Frequency Gain, High Frequency Gain, High Frequency
Compression Ratio, Band Split Filter Crossover Frequency,
AGC-I Threshold Kneepoint, AGC-O Threshold, Volume Control
and Notch Feedback Control.
The DynamEQ
III includes a squelch circuit which attenuates
microphone and circuit noise in quiet environments and high
gain conditions. It also includes low distortion compression
limiting AGC-O, pre and post emphasis circuitry, and an
acoustic feedback notch filter.
The GA3203 hybrid code programmed into the GP523 is "4".
PRELIMINARY DATA SHEET
GA3203 Programmable
DynamEQ
III
BLOCK DIAGRAM
Revision Date: May 2001
Document No. 522 - 13 - 04
GA3203
IN
GND
MS
C3
C1
C19
C20
1
FAST
DETECTOR
CONTROL
RECTIFIER
REGULATOR
5
C6
3
GP523
2
COMPRESSOR
R2
C13
GA3203
7
C18
C2
8
B
IN
B
OUT
RECTIFIER
9
C17
C21
45k5
80n
80n
8n
20n
150n
20n
100n
10n
100n
8n
SQUELCH
DETECTOR
SDA
10
C4
15n
R5
92k
1
X
1
X
R6
185k
R8
92k
R3
185k
NOTCH
AGC-O
R7
460k
SW
C15
4n
C14
100n
Rsquelch
Ragc
R1
24 dB / Oct
BAND SPLIT
FILTER
Lp
Hp
64k
OUT
6
C16
30n
R4
184k
18k
I REF
R9
- A
- B
- C
4
V
REG
GND
SLOW
DETECTOR
COMPRESSOR
V
B
All resistors in ohms, all capacitors in farads, unless otherwise stated.
V
REF
2
522 - 13 - 04
GA3203
ABSOLUTE MAXIMUM RATINGS
PARAMETER VALUE
PAD CONNECTION
ELECTRICAL CHARACTERISTICS
Conditions: Supply Voltage V
B
= 1.3VDC, Frequency = 3kHz, Temperature = 25C
The programmable parameters are adjusted to the following set values unless otherwise specified:
(FC) R1 - Tap 15; (TH) R2 - Tap 15; (G
HI
) R3 - Tap 0; (CR
HI
) R4 - Tap 15; (MPO) R5 - Tap 4; (G
LO
) R6 - Tap 15;
(NOTCH) R7 - Tap 24; (VC) R8 - Tap 23; (Squelch) SW - CLOSED (0).
Supply Voltage
2VDC
Power Dissipation
25mW
Operating Temperature Range
-10C to 40C
Storage Temperature Range
-20C to 70C
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC FREE WORKSTATION
NOTE 1: Measured at output of Stage B
2
5
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522 - 13 - 04
GA3203
ELECTRICAL CHARACTERISTICS (CONTINUED)
Conditions: Supply Voltage V
B
= 1.3VDC, Frequency = 3kHz, Temperature = 25C
The programmable parameters are adjusted to the following set values unless otherwise specified:
(FC) R1 - Tap 15; (TH) R2 - Tap 15; (G
HI
) R3 - Tap 0; (CR
HI
) R4 - Tap 15; (MPO) R5 - Tap 4; (G
LO
) R6 - Tap 15;
(NOTCH) R7 - Tap 24; (VC) R8 - Tap 23; (Squelch) SW - CLOSED (0).
NOTE 1: Measured at output of Stage B
SUPPORT SOFTWARE
All support software for the GA3203 and the GP523 is
available from Gennum's website:
www.gennum.com/hip/software
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.
0
z
H
k
n
o
i
t
a
u
n
e
t
t
A
h
c
t
o
N
N
F
N
T
T
A
3
2
p
a
T
-
7
R
7
2
1
7
1
B
d
4
522 - 13 - 04
GA3203
Fig. 1 Test Circuit
Fig. 2 Typical Application circuit
C3
C1
C19
C20
1
FAST
DETECTOR
CONTROL
RECTIFIER
REGULATOR
5
C6
3
GP523
2
COMPRESSOR
R2
C13
GA3203
7
C18
C2
8
RECTIFIER
9
C17
C21
45k5
80n
80n
8n
20n
150n
20n
100n
10n
100n
8n
SQUELCH
DETECTOR
10
C4
15n
R5
92k
1
X
1
X
R6
185k
R8
92k
R3
185k
NOTCH
AGC-O
R7
460k
SW
C15
4n
C14
100n
Rsquelch
Ragc
R1
24 dB / Oct
BAND SPLIT
FILTER
Lp
Hp
64k
6
C16
30n
R4
184k
18k
I REF
R9
- A
- B
- C
4
SLOW
DETECTOR
COMPRESSOR
V
B
50k
3k9
All resistors in ohms, all capacitors in farads, unless otherwise stated.
C3
C1
C19
C20
1
FAST
DETECTOR
CONTROL
RECTIFIER
REGULATOR
5
C6
3
GP523
2
COMPRESSOR
R2
C13
GA3203
7
C18
C2
8
RECTIFIER
9
C17
C21
45k5
80n
80n
8n
20n
150n
20n
100n
10n
100n
8n
SQUELCH
DETECTOR
10
C4
15n
R5
92k
1
X
1
X
R6
185k
R8
92k
R3
185k
NOTCH
AGC-O
R7
460k
SW
C15
4n
C14
100n
Rsquelch
Ragc
R1
24 dB / Oct
BAND SPLIT
FILTER
Lp
Hp
64k
6
C16
30n
R4
184k
18k
I REF
R9
- A
- B
- C
4
SLOW
DETECTOR
COMPRESSOR
V
B
V
B
22
**
All resistors in ohms, all capacitors in farads, unless otherwise stated.
*
*Any Knowles or Microtronic microphone
**Any Knowles Class D integrated receiver
5
522 - 13 - 04
GA3203
Fig. 3 Characterization circuit (used to generate typical curves)
TABLE OF DEFAULTS
R1 - Tap 15
R2 - Tap 15
R3 - Tap 0
R4 - Tap 15
SW - CLOSED
R5 - Tap 4
R6 - Tap 0
R7 - Tap 24
R8 - Tap 23
Fig. 4 Typical Assembly Diagram
C3
C1
C19
C20
1
FAST
DETECTOR
CONTROL
RECTIFIER
REGULATOR
5
C6
3
GP523
2
COMPRESSOR
R2
C13
GA3203
7
C18
C2
8
RECTIFIER
9
C17
C21
45k5
80n
80n
8n
20n
150n
20n
100n
10n
100n
8n
SQUELCH
DETECTOR
10
C4
15n
R5
92k
1
X
1
X
R6
185k
R8
92k
R3
185k
NOTCH
AGC-O
R7
460k
SW
C15
4n
C14
100n
Rsquelch
Ragc
R1
24 dB / Oct
BAND SPLIT
FILTER
Lp
Hp
64k
6
C16
30n
R4
184k
18k
I REF
R9
- A
- B
- C
4
SLOW
DETECTOR
COMPRESSOR
V
B
= 1.3V
50k
3k9
to
programmer
All resistors in ohms, all capacitors in farads, unless otherwise stated.
TO PROGRAMMER
MEMORY
SELECT
1
2
3
4
5
6
7
8
9
10
VREG
IN
GND
GND
MS
SDA
B
OUT
B
IN
VB
OUT
BATTERY
+
_
+
MICROPHONE
22
+
RECEIVER
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