Patent pending
DATA SHEET
Programmable
DynamEQ
II
- GM3038
FEATURES
DynamEQ
II flexibility
five programmable parameters
24 dB/oct state variable filter
twin average detectors
handles high input levels
drives class D integrated receivers
STANDARD PACKAGING
Hybrid typical dimensions:
0.250 in x 0.115 in x 0.120 in
(6.35 mm x 2.92 mm x 3.05 mm)
DESCRIPTION
The GM3038 programmable hybrid is composed of a
DynamEQ
II Wide Dynamic Range Compression signal
processor and the ER102 controller memory chip. The
hybrid incorporates 24 dB/oct filtering.
The gain and frequency response are dependent on the user's
environment. The Twin Average Detector circuit is optimized
for sound quality during normal listening without sacrificing
comfort during sudden loud sounds.
The GM3038 features five programmable parameters:
independent compression ratio adjustment in the High and
Low frequency channels, threshold adjustment, crossover
frequency adjustment and MPO adjustment.
The ER102 controller memory chip is supported by a variety
of programmers available on the market.
The output stage is designed as a preamplifier for the class D
integrated receiver.
BLOCK DIAGRAM
V
B
OUT
V
REG
IN
GND
SDA
B
OUT
B
IN
0
22
0
22
C1
GM3038
C2
C6
C5
C4
C3
C7
0
1
0
1
0
1
0
2
10n
R2
150k
R3
150k
R4
300k
ER102
R6
600k
R5
1M
R2R
V
SS
SDA
R3R
R4R
R5S
R5R
R6S
R6R
V
DD
2
3
4
8
5
6
7
1
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CONTROL
10k
RECTIFIER
V
B
50k
REGULATOR
48k
48k
8k4
1M
1M
14k
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
Low Frequency
Expander / Compressor
R
AGC_IN
R
H
RL
53.5k
85.6k
R
LO
R
HI
4:1
1:1A
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
1:1B
C
FAD
V
B
V
REG
IN
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
All resistors in ohms, all capacitors in farads
unless otherwise stated.
Revision Date: August 1999
Document No. 521 - 62 - 04
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
GM3038
2
521 - 62 - 04
GM3038
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Hybrid Current
I
AMP
-
370
530
A
Minimum Voltage
Vb
1.1
-
-
V
Total Harmonic Distortion
THD
V
IN
= -40dBV at 1kHz
-
0.6
1.25
%
THD with Maximum Allowable Input
THD
M
V
IN
= -23dBV, Rvc = 47k
-
2
10
%
Input Referred Noise
IRN
A Weighted Filter
-
3.0
-
V
RMS
Total System Gain
A
V
V
IN
= -90dBV
46
49
52
dB
Regulator Voltage
V
REG
I
LOAD
= 30
A
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(-90dBV
IN
) -Gain(-30dBV
IN
)
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
V
IN
=3kHz, -60dBV to -40dBV,
R5 - set 31; R6 - set 15
0.9
1.0
1.1
Ratio
Max. Comp. Ratio
CMP
4 :1
V
IN
=3kHz, -60dBV to -40dBV,
R5 - set 0; R6 - set 0
3.6
4.0
4.3
Ratio
Fast Detector Time Constant
FAST
-
10
-
ms
Slow Detector Time Constant
SLOW
-
220
-
ms
FILTER
Maximum Crossover Frequency
c_0
R4 - set 0
3.0
3.9
-
kHz
Nominal Crossover Frequency
c_22
R4 - set 7
1.38
1.8
2.18
kHz
Minimum Crossover Frequency
c_220
R4 - set 13
-
0.9
1.4
kHz
Filter Rolloff Rate
-
24
-
dB/oct
Refer to ER102 Data Sheet for GM3038 communication and SDA pin Electrical Characteristics
Conditions: Supply Voltage V
B
= 1.3 V, Frequency = 1 kHz, Temperature = 25
C
The programmable parameters are adjusted to the following set values unless otherwise specified.
(MPO) R2 - set 0; (TH) R3 - set 15; (FC) R4 - set 7; (HP) R5 - set 0; (LP) R6 - set 0
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE / UNITS
Supply Voltage
2VDC
Power Dissipation
25 mW
Operating Temperature Range
-10
C to 40
C
Storage Temperature Range
-20
C to 70
C
Voltage on SDA pad
16V
PAD CONNECTION
V
B
OUT
B
OUT
B
IN
GND
V
REG
IN
SDA
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
3
521 - 62 - 04
GM3038
3.9k
2
2
R
VC
100k
V
B
SDA
B
OUT
B
IN
0
22
0
22
C1
C6
C5
GM3038
C2
C4
C3
C7
0
1
0
1
0
1
0
2
10n
R2
150k
R3
150k
R4
300k
ER102
R6
600k
R5
1M
R2R
V
SS
SDA
R3R
R4R
R5S
R5R
R6S
R6R
V
DD
2
3
4
8
5
6
7
1
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CONTROL
10k
RECTIFIER
V
B
50k
REGULATOR
48k
48k
8k4
1M
1M
14k
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
Low Frequency
Expander / Compressor
R
AGC_IN
R
H
RL
53.5k
85.6k
R
LO
R
HI
4:1
1:1A
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
1:1B
C
FAD
V
B
V
REG
IN
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
V
B
50k
All resistors in ohms, all capacitors in farads unless otherwise stated
Fig. 1 Production Test Circuit
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STAGE A and B
-
-
-
Open Loop Gain (B)
A
OL_B
-
52
-
dB
Input Impedance (A)
R
IN
9
11
13
k
OUTPUT STAGE
Stage Gain
A
C
V
IN
=-30dBV
7
9
11
dB
Max Output Level
MPO
R
VC
=220k
,V
IN
=-25dBV
-14.5
-12.5
-10.5
dBV
MPO Range
MPO
R2 - set 0 to set 11
13
15
17
dB
Output Resistance
R
OUT
-
24
-
k
ELECTRICAL CHARACTERISTICS continued
Table of Defaults
R2 - set 0
R3 - set 15
R4 - set 7
R5 - set 0
R6 - set 0
Refer to ER102 Data Sheet for GM3038 communication and SDA pin Electrical Characteristics
Conditions: Supply Voltage V
B
= 1.3 V, Frequency = 1 kHz, Temperature = 25
C
The programmable parameters are adjusted to the following set values unless otherwise specified. (MPO) R2 - set 0; (TH) R3 - set 15;
(FC) R4 - set 7; (HP) R5 - set 0; (LP) R6 - set 0
All conditions and parameters remain as shown in the Test Circuit unless otherwise specified in the CONDITIONS column.
4
521 - 62 - 04
GM3038
R
VC
100k
V
B
B
OUT
B
IN
0
22
0
22
C1
C6
C5
GM3038
C2
C4
C3
C7
0
1
0
1
0
1
0
2
10n
R2
150k
R3
150k
R4
300k
ER102
R6
600k
R5
1M
R2R
V
SS
SDA
R3R
R4R
R5S
R5R
R6S
R6R
V
DD
2
3
4
8
5
6
7
1
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CONTROL
10k
RECTIFIER
V
B
50k
REGULATOR
48k
48k
8k4
1M
1M
14k
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
Low Frequency
Expander / Compressor
R
AGC_IN
R
H
RL
53.5k
85.6k
R
LO
R
HI
4:1
1:1A
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
1:1B
C
FAD
V
B
V
REG
IN
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
V
B
= 1.3V
2
2
50k
to programmer
Pink
Noise
Generator
V
IN
=
-80dBV
V
B
R
VC
2
2
100k
LOG
V
B
OUT
V
REG
IN
GND
SDA
B
OUT
B
IN
0
22
0
22
C1
C6
C5
GM3038
C2
C4
C3
C7
0
1
0
1
0
1
0
2
10n
R2
150k
R3
150k
R4
300k
ER102
R6
600k
R5
1M
R2R
V
SS
SDA
R3R
R4R
R5S
R5R
R6S
R6R
V
DD
2
3
4
8
5
6
7
1
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CONTROL
10k
RECTIFIER
V
B
50k
REGULATOR
48k
48k
8k4
1M
1M
14k
12k
1
X
- B
- A
- C
24 dB / Oct
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
Low Frequency
Expander / Compressor
R
AGC_IN
R
H
RL
53.5k
85.6k
R
LO
R
HI
4:1
1:1A
C
SAD
MPO
R
TH
B
OUT
B
IN
R
FC
F
OUT
A
OUT
REC
OUT
1:1B
C
FAD
V
B
V
REG
IN
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
V
B
Any
Knowles or
Microtronic
microphone
Any
Knowles
class D
integrated
receiver
Fig. 3 Characterization Circuit (Used to generate typical curves)
All resistors in ohms, all capacitors
in farads, unless otherwise stated
Fig. 2 Typical Application Circuit
All resistors in ohms, all capacitors
in farads, unless otherwise stated
Table of Defaults
R2 - set 0
R3 - set 15
R4 - set 15
R5 - set 31
R6 - set 15
5
521 - 62 - 04
GM3038
TYPICAL PERFORMANCE CURVES
OUTPUT LEVEL (dBV)
-20
-30
-40
-50
-60
-70
-80
-90
-100 -90 - 80 -70 -60 -50 -40 -30 -20
INPUT LEVEL (dBV)
Fig. 5 I/O Transfer Function for Different Compression Ratios
(High Frequency Channel)
48
44
40
36
32
28
24
20
16
12
8
4
0
GAIN (dB)
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 31
R5 RESISTOR SET ON ER102 DIE
(set 0 - short, set 31- open)
Fig. 6 High Frequency Gain (Compression Ratio Adjustment)
-100 -90 -80 -70 -60 -50 -40 -30 -20
INPUT LEVEL (dBV)
Fig. 7 I/O Transfer Function for Different Compression Ratios
(Low Frequency Channel)
GAIN (dB)
V
IN
= -80dBV
-20
-30
-40
-50
-60
-70
-80
-90
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R6 RESISTOR SET ON ER102 DIE
(set 0 - short, set 15- open)
Fig. 8 Low Frequency Gain (Compression Ratio Adjustment)
R5 - set 0
Fig. 4 Typical Assembly Diagram
Used
Settings
0
9
12
14
V
IN
= -80dBV
R6 - set 0
R6 - set 15
OUTPUT LEVEL (dBV)
48
44
40
36
32
28
24
20
16
12
8
4
0
R5 - set 31
16
17
18
19
20
21
23
24
26
28
30
31
+
MICROPHONE
TO PROGRAMMER
+
RECEIVER
BATTERY
2
2
+
-
VOLUME
CONTROL
= 1kHz
= 1kHz
R4 - set 15
R4 - set 0
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