Gennum Corporation GA3202 Datasheet
OUT
V
REG
IN
GND
B
OUT
B
IN
7n4
0µ14
C2
C1
C14
80n
81n
92n
81n
37k
FAST
AVERAGE
DETECTOR
SLOW
AVERAGE
DETECTOR
CONTROL
10k
R2
R1
R3
R4
RECT.
V
B
3k3
85k6
42k8
REGULATOR
48k
48k
11k
2M
1M
13k1
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Exp'der / Comp'r
Low Frequency
Exp'der / Comp'r
R
AGC_IN
R
H
R
L
R
LO
R
HI
4:1
1:1
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
C
FAD
83n
C6
V
REF
V
REG
IN
GND
C4
C7
C3
100k
2:1
GA3202
12k
R
TH
Rƒ
C
198k
MPO
R
LO
R
HI
4:1
1:1
2:1
V
B
C8
8n5
V
BA
T
8
1
2
13
14
15
3
10
4
5
9
12
11
6
7
8n
C5
All resistors in ohms, all capacitors in farads, unless otherwise stated.
Patent Pending
DynamEQ®II
WDRC System - GA3202
FEATURES
• dual channel signal processing
• reflowable hybrid
• 4th order state variable filter
• adjustable crossover frequency
• adjustable compression ratio from 1:1 to 4:1
• independent compression ratio adjustment for
low and high frequency band
• adjustable AGC threshold levels
• unique twin average detectors
• > 95dB dynamic range
• low THD and IMD distortion
• drives class D integrated receivers
• MPO range externally adjustable
thinSTAX
™
PACKAGING
Hybrid Typical Dimensions:
0.190 x 0.105 x 0.050in.
(4.83 x 2.67 x 1.27mm)
DEVICE DESCRIPTION
The DynamEQ
®
II hybrid family is a second generation Wide
Dynamic Range Compression (WDRC) system.
The small hybrid design makes it particularly suitable for
CIC applications. GA3202 hybrid incorporates 24dB/oct
filtering. The gain and frequency response is dependant on
the user's environment.
Twin averaging detector circuits are optimized for sound
quality during normal listening, without sacrificing comfort
during sudden loud inputs.
All input signals to DynamEQ
®
II are processed by 2:1
compression before subsequent band splitting.
The 24 dB/oct band split filter ahead of the expander/
compressor circuits allows for independent compression ratio
adjustments (1:1 to 4:1) in high and low frequency channels.
The gain setting stage is followed by a class D integrated
receiver preamplifier stage. Symmetrical peak clipping is
used to achieve MPO adjustment.
The GA3202 is designed as a CIC alternative to GS3032,
GR3032 and GS3028 with MPO adjustment range modifications.
PRELIMINARY DATA SHEET
BLOCK DIAGRAM
Document No. 521 - 91 - 03
Revision Date: September 1999
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
GA3202
2
521 - 91 - 03
GA3202
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Hybrid Current I
AMP
- 380 530 µA
Minimum Voltage Vb - - - V
Total Harmonic Distortion THD V
IN
= -40dBV at 1kHz - 0.2 1.0 %
THD with Maximum Allowable Input THD
M
V
IN
= -23dBV, Rvc = 47kΩ -2-%
Input Referred Noise IRN Aweight - 3.0 - µV
RMS
Total System Gain A
V
V
IN
= -90dBV 45 48 51 dB
Regulator Voltage V
REG
I
LOAD
= 30µA 890 930 1000 mV
AGC
Lower Threshold TH
LO
-91 -87 -83 dBV
Upper Threshold TH
HI
-36 -32 -28 dBV
Compression Gain Range ∆A Gain(-90dBVIN) -Gain(-30dBVIN) 37.5 40.5 43.5 dB
System Gain in Compression A
60
V
IN
=-60dBV 26 29 32 dB
Min. Compression Ratio CMP
1 :1
VIN=3kHz, -60dBV to -40dBV,
Rhp=1:1 Rlp=1:1
0.9 1.0 1.1 Ratio
Max. Comp. Ratio CMP
4 :1
VIN =3kHz, -60dBV to -40dBV,
Rhp=4:1, Rlp=4:1
3.6 4.0 4.3 Ratio
Fast Detector Time Constant τ
FAST
-8-ms
Slow Detector Time Constant τ
SLOW
- 180 - ms
FILTER
Maximum Cross-over Frequency ƒ
c_0
Rƒc=0Ω 3.0 3.9 - kHz
Nominal Cross-over Frequency ƒ
c_22
Rƒc=22kΩ 1.5 1.9 2.3 kHz
Minimum Cross-over Frequency ƒ
c_220
Rƒc=220kΩ - 0.9 1.4 kHz
Filter Rolloff Rate - 24 - dB/oct
STAGE A and B --Open Loop Gain (B) A
OL_B
-52-dB
Input Impedance (A) R
IN
-11- kΩ
OUTPUT STAGE
Stage Gain A
C
VIN=-30dBV 7.0 9 11.0 dB
Max Output Level MPO RVC=220kΩ,VIN=-25dBV -16 -14 -12 dBV
MPO Range ∆MPO R
MPO
=0Ω to 100kΩ 17 19 21 dB
Output Resistance R
OUT
-24-kΩ
ABSOLUTE MAXIMUM RATINGS
PARAMETER VALUE
Supply Voltage 3 VDC
Power Dissipation 25 mW
Operating Temperature Range -10° C to 40° C
Storage Temperature Range -20° C to 70° C
PAD CONNECTION
Conditions: Supply Voltage VB = 1.3 V, Frequency = 1 kHz, Temperature = 25°C
All conditions and parameters remain as shown in Test Circuit unless otherwise stated in "Conditions" column.
V
B
B
IN
OUT
IN
MPO
B
OUT
R
TH
R
ƒC
R
HI
4:1
1:1 GND
V
REG
R
LO
7
2:1
1
23
4
6
7
8
9
10
11
12
13
14
5
5
15
GND
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
ELECTRICAL CHARACTERISTICS
3
521 - 91 - 03
GA3202
Fig. 1 Production Test Circuit
Fig. 2 Typical Application Circuit
R
VC
100k Log
2µ2
V
B
R
MPO
100k
Log
Any
Knowles
Class D
receiver
V
B
GND
7n4
0µ14
C2
C1
C14
80n
81n
92n
81n
37k
FAST
AVERAGE
DETECTOR
SLOW
AVERAGE
DETECTOR
CONTROL
10k
R2
R1
R3
R4
RECT.
V
B
3k3
85k6
42k8
REGULATOR
48k
48k
11k
2M
1M
13k1
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Exp'der / Comp'r
Low Frequency
Exp'der / Comp'r
R
AGC_IN
R
H
R
L
R
LO
R
HI
4:1
1:1
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
C
FAD
83n
C6
V
REF
V
REG
IN
C4
C7
C3
100k
2:1
GA3202
12k
198k
C8
8n5
V
BA
T
8
1
2
13
14
15
3
10
4
5
9
12
11
6
7
8n
C5
All resistors in ohms, all capacitors in farads, unless otherwise stated.
Any Knowles
or
Microtronics
microphone
R
TH
100k
Log
R
ƒc
100k Log
200k Linear
R
HI
200k Linear
R
LO
V
B
Rƒc=22k
RVC=100k
R
MPO
=0
50k
GND
7n4
0µ14
C2
C1
C14
80n
81n
92n
81n
37k
FAST
AVERAGE
DETECTOR
SLOW
AVERAGE
DETECTOR
CONTROL
10k
R2
R1
R3
R4
RECT.
V
B
3k3
85k6
42k8
REGULATOR
48k
48k
11k
2M
1M
13k1
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Exp'der / Comp'r
Low Frequency
Exp'der / Comp'r
R
AGC_IN
R
H
R
L
R
LO
R
HI
4:1
1:1
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
C
FAD
83n
C6
V
REF
V
REG
IN
C4
C7
C3
100k
2:1
GA3202
12k
198k
C8
8n5
V
BA
T
8
1
2
13
14
15
3
10
4
5
9
12
11
6
7
8n
C5
All resistors in ohms, all capacitors in farads, unless otherwise stated.
R
TH
=
∞
3.9k
2µ2
V
IN
2µ2
V
B
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