ETC GS3027

DynamEQ® II
WDRC System
GS3027/GS3028 - DATA SHEET
FEATURES
DEVICE DESCRIPTION
• dual channel signal processing
The DynamEQ® II hybrid family is a second generation Wide
Dynamic Range Compression (WDRC) system.
• 2nd (4th) order state variable filter
GS3027 (GS3028) Hybrid incorporates 12 dB/oct (24 dB/
oct) filtering and is designed to accommodate CIC and ITC
size requirements.
• adjustable crossover frequency
• adjustable compression ratio from 1:1 to 4:1
The gain and frequency response is dependant on the user’s
environment.
• independent compression ratio adjustment for
low and high frequency band
Twin averaging detector circuits are optimized for sound
quality during normal listening without sacrificing comfort
during sudden loud inputs.
• adjustable AGC threshold levels
• unique twin average detectors
All input signals to DynamEQ® II, are processed by 2:1
compression before subsequent band splitting.
• handles high input levels
The 12 dB/oct (24 dB/oct) band split filter ahead of the
expander/compressor circuits allows for independent
compression ratio adjustment (1:1 to 4:1) in high and low
frequency channels.
• low THD and IMD distortion
• drives class D Integrated Receivers
• MPO range externally adjustable
The gain setting stage is followed by a class D Integrated
Receiver preamplifier stage. Symmetrical peak clipping is
used to achieve MPO adjustment.
STANDARD PACKAGING
Hybrid Typical Dimensions
0.180 in x 0.110 in x 0.080 in
(4.57 mm x 2.79 mm x 2.03 mm)
VB
1
CSAD
1:1
2:1
9
13
16
C5
4:1
RHI
RLO
11
12
10
10n
1M
VREG
REGULATOR
8
C1
0µ1
RTH
SLOW
AVERAGE
DETECTOR
1M
FAST
AVERAGE
DETECTOR
1
CONTROL
15
RECTIFIER
X
50k
VB
RAGC_IN
48k
RH
C2
IN
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
10k
-A
7
0µ2
C4
High Frequency
Expander / Compressor
-B
12k
5
14 OUT
0µ1
RL
48k
8k4
Low Frequency
Expander / Compressor
GND
-C
14k
17 MPO
C3
GS3027
(GS3028)
0µ1
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
Patent Pending
Revision Date: May 1998
6
4
3
Rƒc
FOUT
BIN
2
BOUT
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 34 - 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
1:1
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
13
13
OUT
14
RLO
RHI
4:1
12
11
10
10
RTH
Rth
2:1
2:1
MPO
15
16
16
17
17
CSAD
VREG
9
8
77
IN
55
CAUTION
CLASS 1 ESD SENSITIVITY
ELECTRICAL CHARACTERISTICS
1
2
3
VB
BOUT
BIN
4
FOUT
66
Rƒc
GND
Conditions: Supply Voltage VB = 1.3 V, Frequency = 1 kHz, Temperature = 25°C
PARAMETER
SYMBOL
CONDITIONS
IAMP
Hybrid Current
Minimum Voltage
MIN
-
Vb
TYP
370
MAX
UNITS
530
µA
1.1
-
-
V
Total Harmonic Distortion
THD
VIN = -40dBV at 1kHz
-
0.2
1.0
%
THD with Maximum Allowable Input
THDM
VIN = -23dBV, Rvc = 47kΩ
-
2
10
%
-
3.0
-
µVRMS
Input Referred Noise
IRN
Aweight
Total System Gain
AV
VIN = -90dBV
46
49
52
dB
Regulator Voltage
VREG
ILOAD = 30µA
890
930
1000
mV
AGC
Lower Threshold
THLO
-91
-87
-83
dBV
Upper Threshold
THHI
-36
-32
-28
dBV
Compression Gain Range
∆A
Gain(-90dBVIN) -Gain(-30dBVIN)
37.5
40.5
43.5
dB
A60
VIN =-60dBV
26
29
32
dB
0.9
1.0
1.1
Ratio
3.6
4.0
4.3
Ratio
System Gain in Compression
Min. Compression Ratio
CMP1 :1
VIN=3kHz, -60dBV to -40dBV,
Rhp=1:1 Rlp=1:1
Max. Comp. Ratio
CMP4 :1
VIN =3kHz, -60dBV to -40dBV,
Rhp=4:1, Rlp=4:1
Fast Detector Time Constant
τFAST
-
10
-
ms
Slow Detector Time Constant
τSLOW
-
220
-
ms
3.9
-
kHz
FILTER
Maximum Cross-over Frequency
ƒc_0
Rƒc=0Ω
3.0
Nominal Cross-over Frequency
ƒc_22
Rƒc=22kΩ
1.5
1.9
2.3
kHz
Minimum Cross-over Frequency
ƒc_220
Rƒc=220kΩ
-
0.9
1.4
kHz
-
12
-
dB/oct
dB/oct
Filter Rolloff Rate (GS3027)
(GS3028)
STAGE A and B
-
24
-
-
-
-
Open Loop Gain (B)
AOL_B
-
52
-
dB
Input Impedance (A)
RIN
9
11
13
kΩ
7
9
11
dB
-14.5
-12.5
-10.5
13
15
17
dB
-
24
-
kΩ
OUTPUT STAGE
Stage Gain
Max Output Level
MPO Range
Output Resistance
AC
MPO
∆MPO
VIN=-30dBV
RVC=220kΩ,VIN=-25dBV
RMPO=0Ω to 50kΩ
ROUT
All conditions and parameters remain as shown in Test Circuit unless otherwise stated in "Conditions" column.
521 - 34 - 03
2
dBV
VB
0µ22
1
9
13
C5
10
16
11
12
10n
1M
SLOW
AVERAGE
DETECTOR
REGULATOR
8
C1
0µ1
2µ2
1M
FAST
AVERAGE
DETECTOR
1
CONTROL
15
RECTIFIER
X
R =∞
TH
50k
VB
RAGC_IN
48k
RH
C2
3.9k
VIN
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
10k
-A
7
0µ2
C4
High Frequency
Expander / Compressor
-B
0µ1
RL
48k
12k
50k
8k4
Low Frequency
Expander / Compressor
5
14
-C
14k
17
C3
GS3027
(GS3028)
0µ1
6
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
4
Rƒc = 22k
3
R
0µ22
R
=0
MPO
2
=100k
VC
Fig. 1 Production Test Circuit
RHI
200k Linear
VB
RLO
200k Linear
0µ22
1
9
13
C5
10
16
11
12
10n
1M
REGULATOR
8
C1
0µ1
RTH
100k
Log
1M
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
CONTROL
15
RECTIFIER
X
50k
48k
RH
C2
0µ2
Any Knowles
or
Microtronics
microphone
12k
5
C4
High Frequency
Expander / Compressor
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
10k
-A
7
VB
VB
RAGC_IN
-B
14
-C
0µ1
RL
Low Frequency
Expander / Compressor
Any
Knowles
Class D
receiver
2µ2
48k
8k4
14k
17
R
MPO
50k
Log
C3
GS3027
0µ1
(GS3028)
6
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
4
2
3
R
ƒc
100k Log
0µ22
R
VC
100k Log
Fig. 2 Maximum Flexibility Hearing Instrument Application
3
521 - 34 - 03
VB
0µ22
1
9
13
C5
10
16
11
12
10n
1M
REGULATOR
8
C1
0µ1
1M
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
CONTROL
15
RECTIFIER
X
50k
RAGC_IN
48k
RH
C2
-A
0µ2
12k
5
C4
High Frequency
Expander / Compressor
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
10k
7
Any Knowles
or
Microtronics
microphone
VB
VB
-B
14
-C
0µ1
RL
Low Frequency
Expander / Compressor
Any
Knowles
Class D
receiver
48k
8k4
14k
17
C3
GS3027
0µ1
(GS3028)
6
4
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
2
3
R
0µ22
VC
100k Log
Fig. 3 Minimum Component Hearing Instrument Application
VB=1.3V
RHI1 = 200k
RHI2 = 0
RLO1 = 200k
RLO2 = 0
0µ22
1
13
9
16
10
11
12
C5
10n
1M
REGULATOR
8
C1
0µ1
2µ2
SLOW
AVERAGE
DETECTOR
1M
FAST
AVERAGE
DETECTOR
1
CONTROL
15
RECTIFIER
X
R
TH
50k
=∞
VB
RAGC_IN
48k
RH
3.9k
C2
Pink Noise
Generator
or
1kHz for I/O
5
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
10k
-A
7
0µ2
C4
High Frequency
Expander / Compressor
-B
14
-C
0µ1
48k
8k4
RL
50k
Low Frequency
Expander / Compressor
12k
14k
17
C3
GS3027
0µ1
(GS3028)
6
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
4
R
=100k
ƒc
3
0µ22
Fig. 4 Characterization Circuit (Used to generate typical curves)
521 - 34 - 03
4
2
R
VC
=100k
R
MPO
=0
0µ22
RLO
12
1:1
13
RHI
11
CSAD
9
4:1
10
VREG
8
MICROPHONE
OUT
14
RTH
15
VB
1
BOUT
2
2:1
16
MPO
17
BIN
3
FOUT
4
GND
5
Rƒc
6
0µ22
VOLUME
CONTROL
RECEIVER
+
IN
7
-
+
BATTERY
+
Fig. 5 Typical Assembly Diagram
TYPICAL PERFORMANCE CURVES
-10
50
2:1
3:1
-30
40
VIN = -60dBV
4:1
30
-40
GAIN (dB)
OUTPUT LEVEL (dBV)
VIN = -96dBV
VIN = -80dBV
-20
1.5:1
-50
1.2:1
-60
20
VIN = -40dBV
VIN = -20dBV
10
1:1
-70
0
-80
-90
-100
-90
- 80
-70
-60
-50
-40
-30
-10
20
-20
100
VIN = -60dBV
RVC = 220kΩ
40
0.8
RVC = 100kΩ
0.7
30
GAIN (dB)
RHI1
RHI1+RHI2
)
0.9
(
20k
50
1.0
0.6
0.5
RLO1
10k
Fig. 7 Frequency Response for Different Input Levels
Fig. 6 I/O Transfer function for Different Compression Ratios
RLO1+RLO2
1k
FREQUENCY (Hz)
INPUT LEVEL (dBV)
0.4
RVC = 47kΩ
RVC = 22kΩ
20
RVC = 10kΩ
10
0.3
0.2
0
0.1
-10
20
0.0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
100
1k
10k
20k
COMPRESSION RATIO (RATIO)
FREQUENCY (Hz)
Fig. 8 Compression Settings Resistor Ratio for High Pass
Channel (RHI1 & RHI2) and Low Pass Channel (RLO1 & RLO2)
Fig. 9 Frequency Response for Different RVC Values
5
521 - 34 - 03
-10
-10
COMPRESSION 1:1
RM PO = 0Ω
RM PO = 10kΩ
OUTPUT LEVEL (dBV)
OUTPUT LEVEL (dBV)
-20
-20
RM PO = 22kΩ
RM PO = 50kΩ
-30
-40
-30
RTH = ∞
RTH = 0Ω
-40
RTH = 10kΩ
-50
RTH = 22kΩ
RTH = 47kΩ
-60
RTH = 100kΩ
-50
-50
-40
-30
-70
-100
-20
-90
-80
INPUT LEVEL (dBV)
Fig. 10 I/O Transfer Function for
Fig. 11
Different RMPO Resistors
-50
-40
30
-20
30
-20
I/O Transfer Function for
10000
RH & RL RESISTORS VALUES (kΩ)
198kΩ
100
9kΩ
10
-90
-80
-70
-60
-50
-40
30
1.6MΩ
1000
1:1
100
72kΩ
2:1
4:1
15kΩ
10
-100
-20
-90
-80
-70
-60
-50
-40
INPUT LEVEL (dBV)
INPUT LEVEL (dBV)
Fig. 12 Stage A Compressor Feedback Resistor Value
Fig. 13 Expander / Compressor Resistors Values
GAIN (dB)
50
50
Crossover
Frequency
Rƒc = ∞
40
40
30
30
20
GAIN (dB)
RAGC RESISTOR VALUE (kΩ)
-60
Different RTH Resistors
1000
1
-100
-70
INPUT LEVEL (dBV)
4:1 in Low Frequency
1:1 in High Frequency
10
Crossover
Frequency
Rƒc = ∞
20
10
4:1 in Low Frequency
1:1 in High Frequency
1:1 in Low Frequency
4:1 in High Frequency
0
-10
20
521 - 34 - 03
0
VIN = -80dBV
100
1k
10k
-10
20
20k
1:1 in Low Frequency
4:1 in High Frequency
100
1k
VIN = -80dBV
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
Fig. 14 Crossover Frequency Representation
Fig. 15 Crossover Frequency Representation
for GS3027 Processor
for GS3028 Processor
6
20k
50
50
1:1 in Low Frequency Gain
4:1 in High Frequency
1:1 in Low Frequency Gain
4:1 in High Frequency
40
40
Rƒc=∞
100kΩ
30
30
47kΩ
20
22kΩ
10kΩ
10
47kΩ
GAIN (dB)
GAIN (dB)
Rƒc=∞
100kΩ
20
22kΩ
10
0Ω
0Ω
0
0
-10
20
VIN = -80dBV
100
1k
10k
-10
20
20k
VIN = -80dBV
100
1k
10k
20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Fig. 16 GS3027 Frequency Response
Fig. 17 GS3028 Frequency Response
for Different Rƒc Resistor Values
for Different Rƒc Resistor Values
10
10
ƒ= 1 kHz
THD & NOISE (%)
VIN = -40dBV
THD & NOISE (%)
10kΩ
GS3028
1
1
GS3028
GS3027
0.1
100
1000
0.1
-80
10000
GS3027
-70
-60
-50
-40
-30
FREQUENCY (Hz)
INPUT LEVEL (dBV)
Fig. 18 THD and Noise vs Frequency
Fig. 19 THD and Noise vs Input Level
-20
10
10
VIN = -40dBV
∆ƒ = 200Hz
ƒ = 4kHz
∆ƒ = 200Hz
IMD (%)
IMD (%)
1
1
GS3027
GS3027
0.1
GS3028
0.1
3000
GS3028
10000
0.01
-80
100000
-70
-60
-50
-40
-30
FREQUENCY (Hz)
INPUT LEVEL (dBV)
Fig. 20 Intermodulation Distortion (CCIF) vs Frequency
Fig. 21 Intermodulation Distortion
-20
(CCIF) vs Input Level
7
521 - 34 - 03
0.180
(4.57)
XXXXXX
GS3027
0.090 MAX
(2.28)
0.110
(2.79)
13
12
11
10
14
15
16
17
9
8
7
5
2
1
3
4
6
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 ± 0.003 (± 0.08) unless otherwise stated.
Smallest pad 0.0195 x 0.025 (0.50 x 0.64)
Largest pad 0.020 x 0.063 (0.50 x 1.60)
XXXXXX - work order number.
Component name - either GS3027 or GS3028.
Fig. 22
Hybrid Layout & Dimensions
GENNUM CORPORATION
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.
MAILING ADDRESS:
P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814
SHIPPING ADDRESS:
970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5
REVISION NOTES:
GENNUM JAPAN CORPORATION
Updated to Data sheet
C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081,
Japan
Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839
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 April 1995 Gennum Corporation.
All rights reserved.
521 - 34 - 03
8
Printed in Canada.