ETC GS3023

CIC Size DynamEQ® I
Dynamic Equalizer - Class D
GS3023 - DATA SHEET
FEATURES
This WDRC (Wide Dynamic Range Compression) system can
be easily configured to provide either a TILL (Treble Increases
at Low Level) or wideband response.
• unique twin average detectors
• dual channel signal processing
• adjustable AGC threshold levels
Twin averaging detector circuits drastically reduce the pumping effects associated with traditional fast attack/slow release
systems. The fast detection circuitry cuts in to control the
output level during impulsive sounds, but quickly backs out of
the way during normal operation.
• MPO range externally adjustable
• handles high input levels (up to 100 mVRMS)
cleanly
• designed for CIC instruments
• 2:1 compression of high frequencies
Low distortion, large signal handling capabilities and constant
corner frequncy make it ideal for providing loudness growth
compensation for many of the mild to moderate cases.
• designed to drive class D integrated receivers
• 65% smaller by volume than DynamEQ® I (GS3011)
The size of the hybrid and variety of electrical access points,
offers system design flexibility perfect for ITC and CIC
applications.
• 50% smaller by volume than DynamEQ® I (GS3021)
STANDARD PACKAGING
• Hybrid Typical Dimensions
0.180 in x 0.115 in x 0.080 in
(4.57 mm x 2.92 mm x 2.03 mm)
Stage A is a highpass channel with 2:1 compression, Stage B
is a wideband unity gain buffer. The sum of the two paths gives
a high frequency boost to low level signals, which gradually
compresses to a flat response at high input levels. Stage C is
used for volume control adjustment, while stage D is a fixed
gain stage with MPO control designed to drive class D
integrated receivers.
DESCRIPTION
DynamEQ® I (GS3023) hybrid is a dual channel level dependent
input compression amplifier.
VB
CSAD
13
CFAD
11
14
C6
0µ1
100k
VREG 1
REGULATOR
FAST
AVERAGE
DETECTOR
2:1
COMPRESSION
CONTROL
CURRENT
REFERENCE
RTH 12
100k
SLOW
AVERAGE
DETECTOR
68k
RECTIFIER
VB
CHP 10
48k
C1
-A
IN 9
3n9
-C
12k
D
48k
C2
0µ1
5 OUT
-B
50k
C5
47n
8k4
50k
50k
MGND 6
4 MPO
50k
C4
GND 8
C3
0µ1
82n
GS3023
All resistors in ohms, all capacitors in farads unless otherwise stated.
Patent Pending.
7
ABOUT
2
CIN
3
COUT
FUNCTIONAL BLOCK DIAGRAM
Revision Date: May 1998
Document No. 521 - 15 - 03
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: [email protected]
PAD CONNECTION
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE / UNITS
Supply Voltage
3 VDC
Power Dissipation
25 mW
Operating Temperature Range
-10° C to 40° C
Storage Temperature Range
-20° C to 70° C
MGND
VREG
CIN
1
2
6
7
OUT
MPO
3
4
5
GND
8
14
ABOUT
CAUTION
CLASS 1 ESD SENSITIVITY
COUT
CFAD
9
10
11
12
13
IN
CHP
CSAD
R TH
VB
ELECTRICAL CHARACTERISTICS
Conditions: Input Level VIN = -97dBV, Frequency = 5 kHz, Temperature = 25°C, Supply Voltage VB = 1.3 V
PARAMETER
SYMBOL
CONDITIONS
Hybrid Current
I AMP
Minimum Voltage
VB
Total Harmonic Distortion
THD
RVC= 15kΩ; VIN= -40dBV at1kHz
Input Referred Noise
IRN
NFB 0.2 to 10kHz at 12dB/oct
Total System Gain
AV
VIN = 0VRMS , R MPO = 50kΩ
MIN
TYP
MAX
UNITS
120
230
380
µA
1.1
-
-
V
-
0.1
1
%
µVRMS
-
2.5
-
45
48
51
1.74:1
1.95:1
2.11:1
Ratio
dB
AGC
Compression Ratio
COMP
VIN= -60dBV & -80dBV
Compression Gain Range
ARANGE
RVC= 10kΩ; Note 1
High Pass Corner Frequency
ƒHPC
CHP - Not Connected
System Gain in Compression
A80
VIN = -80dBV
Maximum Output Level
MPO
MPO Range
∆MPO
Stage D Gain
AD
Threshold
-
-94
-
dBV
26
28
-
dB
-
3.4
-
kHz
38
40
42
dB
VIN = -20dBV, RMPO = 0Ω
-14.3
-12.3
-10.3
dBV
VIN = -20dBV, RMPO = 0 to 50kΩ
13.8
15.8
17.8
dB
-
16
-
dB
0.89
0.94
0.99
OUTPUT STAGE
REGULATOR
Regulator Voltage
VREG
All parameters remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column
Notes:
521 - 15 - 03
1. A RANGE = V P3 [VIN = -97dBV] - V P3 [VIN = -20 dBV] + 77dBV
2
V
1.3V
2µ2
13
11
14
C6
0µ1
100k
1
100k
SLOW
AVERAGE
DETECTOR
REGULATOR
FAST
AVERAGE
DETECTOR
2µ2
2:1
COMPRESSION
CONTROL
CURRENT
REFERENCE
12
68k
RECTIFIER
VB
10
CHP=0µ1
48k
C1
9
-A
3n9
-C
12k
D
5
3k9
48k
C2
VIN
-B
0µ1
C5
47n
50k
8k4
50k
50k
50k
6
4
50k
C4
8
0µ1
C3
RMPO=0
82n
GS3023
3
2
7
RVC
All resistors in ohms, all capacitors in farads unless otherwise stated.
100k
Fig.1 Production Test Circuit
1.3V
RECOMMENDATIONS: 2.2µF capacitor connected to pin11
No components connected to pin 14
2µ2
13
11
14
C6
0µ1
100k
1
REGULATOR
100k
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
2µ2
2:1
COMPRESSION
CONTROL
CURRENT
REFERENCE
12
68k
RECTIFIER
VB
1.3V
10
48k
C1
-A
9
EM3046
or
MODEL 39
3n9
-C
C5
D
12k
5
ES3126
47n
2µ2
48k
C2
0µ1
-B
50k
8k4
50k
50k
6
4
50k
C4
8
82n
C3
0µ1
7
GS3023
3
2
RVC
All resistors in ohms, all capacitors in farads unless otherwise stated.
100k
Fig. 2 Typical Hearing Instrument Application
3
521 - 15 - 03
VOLUME
CONTROL
BATTERY
+
-
RMPO
2µ2
+
1
2
3
REC
5
4
ES3126
2µ2
+
MIC
6
7
9
10
14
8
EM3046
or
MODEL 39
11
12
13
2µ2
Fig. 3 Typical Assembly Diagram
1.3V
2µ2
13
11
14
C6
0µ1
100k
1
REGULATOR
2µ2
SLOW
AVERAGE
DETECTOR
RTH = ∞
FAST
AVERAGE
DETECTOR
2:1
COMPRESSION
CONTROL
CURRENT
REFERENCE
12
100k
68k
RECTIFIER
VB
10
CHP
(normally not
connected)
9
48k
C1
3n9
-A
-C
12k
D
5
3k9
C2
VIN
0µ1
48k
-B
C5
47n
50k
50k
6
4
50k
C4
8
0µ1
C3
82n
GS3023
7
All resistors in ohms, all capacitors in farads unless otherwise stated.
3
2
RVC
15k
Fig. 4 Characterization Circuit (used to generate typical curves)
521 - 15 - 03
50k
8k4
50k
4
-10
35
VIN=-96dBV
30
-20
VIN =-88dBV
25
-30
OUTPUT LEVEL (dBV)
VIN=-80dBV
20
GAIN (dB)
VIN=-70dBV
15
V IN=-60dBV
10
5
V IN=-40dBV
0
VIN=-20dBV
-5
-40
2kHz
-50
RTH = ∞
5kHz
-60
1kHz
-70
2kHz
-80
-10
5kHz
RTH = 0
-90
-100
-15
20
100
1k
10k
20k
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
FREQUENCY (Hz)
INPUT LEVEL (dBV)
Fig. 5 Frequency Response for Different Input Levels
Fig. 6 I/O Transfer Function for Different Test
Frequencies. Shown for Min/Max RTH Resistors Values
30
35
RVC=100kΩ
25
V IN = -50dBV
VIN=-96dBV
30
RVC=47kΩ
25
20
GAIN (dB)
RVC=22kΩ
15
GAIN (dB)
1kHz
10
RVC=15kΩ
5
CHP=100nF
20
CHP=68nF
15
CHP=33nF
10
CHP=10nF
5
CHP= No capacitor
0
0
-5
V IN=-20dBV
-5
-10
-10
-15
20
100
1k
10k
-15
20k
20
FREQUENCY (Hz)
100
1k
10k
20k
FREQUENCY (Hz)
Fig. 7 Frequency Response for Different RVC Values
Fig. 8 Corner Frequency vs C HP Capacitor Value
35
30
GAIN (dB)
25
RTH = ∞
= 100kΩ
= 47kΩ
20
= 22kΩ
15
=0
10
5
0
-5
-10
VIN=-96dBV
-15
20
100
1k
10k
20k
FREQUENCY (Hz)
Fig. 9 Frequency Characteristics for Different
RTH Values
5
521 - 15 - 03
-10
-12
RMPO=0Ω
-14
-20
-16
-18
-30
ƒ = 5kHz
-20
-40
-50
OUTPUT (dBV)
OUTPUT LEVEL (dBV)
ƒ = 5kHz
RTH = 0Ω
-60
22kΩ
47kΩ
100kΩ
RTH = ∞
-70
-80
RMPO=10kΩ
-22
-24
RMPO=22kΩ
-26
-28
RMPO=33kΩ
RMPO=50kΩ
-30
-32
-34
-36
-38
-40
-90
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
-50
0
-45
-40
-35
-30
-25
-20
-15
-10
-5
INPUT LEVEL (dBV)
INPUT LEVEL (dBV)
Fig. 10 I/O Transfer Function for Different R TH Resistors
Fig. 11 I/O for Various RMPO Settings
1
0
10
THD & NOISE (%)
THD & NOISE (%)
VIN=-40dBV
CHP =0.1µF
ƒ=1kHz
No Capacitor
1
CHP =0.1µF
No Capacitor
0.1
100
0.1
1k
10k
-80
-70
-60
FREQUENCY (Hz)
-50
-40
-30
-20
INPUT LEVEL (dBV)
Fig. 12 THD & Noise vs Frequency
Fig. 13 THD & Noise vs Input Level
1
1.0
IMD (%)
ƒ =4kHz
∆ ƒ=200Hz
IMD (%)
No Capacitor
No Capacitor
0.1
CHP=0.1µF
CHP =0.1µF
VIN=-40dBV
∆ ƒ=200Hz
0.1
0.01
3k
10k
100k
-80
FREQUENCY (Hz)
-60
-50
-40
-30
INPUT LEVEL (dBV
Fig. 14 Intermodulation Distortion (CCIF)
Fig. 15 Intermodulation Distortion (CCIF)
vs Level
vs Frequency
521 - 15 - 03
-70
6
-20
0.180
(4.57)
0.115
(2.92)
GS3023
XXXXXX
0.090 MAX
(2.29)
13
11
12
8
5
4
10
9
14
7
6
3
2
1
Dimension units are in inches.
Dimensions in parenthesis are in millimetres converted
from inches and include minor rounding errors.
1.0000 inches = 25.400 mm.
Dimension ±0.005 (+0.13) unless otherwise stated.
Pad numbers for illustration purposes only.
Smallest pad 0.025 x 0.025 (0.64 x 0.64)
Largest pad 0.025 x 0.065 (0.64 x 1.65)
XXXXXX - work order number.
This hybrid is designed for point to point soldering.
Fig. 16 Hybrid Layout & Dimensions
DOCUMENT IDENTIFICATION: DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
REVISION NOTES:
Updated to Data sheet
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright January 1995 Gennum Corporation.
All rights reserved.
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Printed in Canada.
521 - 15 - 03