GS3034 - DATA SHEET
Revision Date: December 1998
Linear Class H
CIC Size Hybrid
FEATURES
complete linear system
current mode class H output stage
current drive power amp
low distortion / low noise
low amplifier current 190
A typical
small size for CIC applications
STANDARD PACKAGING
Hybrid Typical Dimensions (0.180in x 0.075in x 0.055in)
(4.57mm x 1.91mm x 1.40mm)
Hybrid View
DESCRIPTION
The GS3034 hybrid offers Gennum's new innovative class H
output stage along with two low noise inverting preamplifiers,
in a CIC size package.
This new breed of output stage adapts the bias current of the
receiver to the user's listening environment. In relatively loud
environments the receiver will be fully biased similar to a
traditional class A amplifier. However, as the loudness of the
environment decreases, the bias current of the receiver adjusts
to a minimum level required to cleanly pass the signal. At the
same time the system maintains adequate "headroom" should
the amplitude of the signal suddenly increase. By adapting
the bias of the output stage to the requirements of the signal
being processed, significant current savings can be realized
compared to traditional class A amplifiers.
The rate at which the bias adapts is associated with a capacitor
connected from pad CC of the hybrid to ground. For optimum
performance it is recommended that a 0.22
F capacitor be
used.
The two low noise preamplifiers Stage A and Stage B, can be
used as Volume Control and Gain Trim elements or Stage A as
a filter shaping element and Stage B as the Volume Control. As
the output stage is current drive, frequency shaping is relatively
easy via the addition of a capacitor across the receiver.
V
REG
V
REG
GND
IN
B
OUT
B
IN
A
OUT
A
IN
R
E
V
B
CC
B
RIN
OUT
- A
C1
170
24k
12k
-
C2
0
1
CONTROL
REGULATOR
V
B
V
B
C3
0
1
12k
B
+
-
+
-
C
0
1
C4
15n
GS3034
10
5
9
8
3
2
1
12
11
7
6
4
All resistors in ohms, all capacitors
in farads unless otherwise stated.
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 51 - 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
2
521 - 51 - 04
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
OVERALL
Amplifier Current
I
AMP
80
190
300
A
Minimum Operating Voltage
V
B
-
-
1.1
V
Overall Gain
A
V
44
47
50
dB
Distortion
THD
V
IN
= -40 dBV
-
0.2
1
%
R
GT
= R
VC
=
10 k
Input Referred Noise
IRN
A Weighted Filter
-
-
2.5
V
RMS
VOLTAGE REGULATOR
Regulator Voltage
V
REG
I
LOAD
= 30
A
870
920
970
mVDC
Output Noise
A Weighted Filter
-
2.9
-
V
RMS
STAGE A and STAGE B
Input Bias Current
I
BIAS
R
VC
= R
GT
=
1 M
-25
0
25
nA
DC Voltage Gain Stage A
A
OL -A
38
52
-
dB
Stage B
A
OL -B
30
40
-
dB
Current Source Capabilities
I
SOURCE
15
30
-
A
Output Voltage Swing - Low
V
SINK
200
280
-
mV
STAGE C & CONTROL CIRCUIT
Maximum Current Sinking
I
SINK
R
E
grounded, V
OUT
= 1.3 V
3
6
-
mA
Output Impedance
R
OUT
20
24
-
k
Minimum Emitter Voltage
V
RE-MIN
2
5
9
mV
Maximum Emitter Voltage
V
RE-MAX
68
73
80
mV
Minimum Transducer Current
I
T-MIN
2
20
50
A
Maximum Transducer Current
I
T-MAX
300
400
500
A
Maximum/Minimum Transducer
I
RANGE
15
28
-
dB
Current Ratio
Dynamic Headroom
Headroom
Note 1
14
17
22
dB
Time Constant
T
C
C
CC
= 0.22
F
-
130
-
mS
All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column.
PAD CONNECTION
CAUTION
CLASS 1 ESD SENSITIVITY
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE / UNITS
Supply Voltage
5 VDC
Power Dissipation
25 mW
Operating Temperature Range
-10
C to 40
C
Storage Temperature Range
-20
C to 70
C
Conditions: Frequency = 5 kHz, Temperature 25
C, Voltage Supply = 1.3 VDC
ELECTRICAL CHARACTERISTICS
Notes:
1.
Headroom = 20 Log (V
RE DC
/ V
REACRMS
) [V
IN
=
-79 dBV]
12
11
10
9
8
7
6
5
4
3
2
1
B
OUT
GND
V
REG
IN
BR
IN
B
IN
RE
A
OUT
A
IN
V
B
OUT
CC
3
521 - 51 - 04
V
REG
- A
C1
170
* Minimum 10 nF
capacitor needed
for correct operation
24k
-
170 x V
REMAX
170 x
I
BIAS
- V
REMAX
CONTROL
REGULATOR
V
B
R
E
I
BIAS
V
B
V
B
C3
0
1
12k
B
+
-
+
-
C
0
1
C4
15n
GS3034
10
5
9
8
3
2
1
12
11
7
6
4
100k
100k
Any Knowles or
Microtronic
Class A receiver
(e.g. EH3052)
Any Knowles or
Microtronic
Microphone
(e.g. EM5046
or Model 39)
C
CC
C
P
12k
0
22
10n
R
GT
R
VC
=
*
All resistors in ohms, all capacitors
in farads unless otherwise stated.
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 1 ProductionTest Circuit
Fig. 2 Typical Hearing Instrument Application
V
REG
- A
C1
170
24k
1k
100k
100k
3k9
1.3V
2.6V
-
C2
0
1
CONTROL
REGULATOR
V
B
C
CC
V
IN
R
GT
R
VC
C3
0
1
12k
12k
B
+
-
+
-
C
0
1
10n
C4
15n
GS3034
10
5
9
8
3
2
1
12
11
7
6
4
This capacitor value is not suitable
for actual Hearing Instrument Designs.
Values other than 0
22 can result
in significantly increased distortion
4
521 - 51 - 04
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 4 Characterization Circuit
Fig. 3 Typical Assembly Diagram
VOLUME
CONTROL
BATTERY
+
-
REC
+
MIC
0
22
R
GT
+
12
11
10
9
8
7
6
5
4
3
2
1
10n
V
REG
- A
C1
170
325
24k
12k
-
C2
0
1
CONTROL
REGULATOR
V
B
V
B
C3
0
1
12k
B
+
-
+
-
C
0
1
C4
15n
GS3034
10
5
9
8
3
2
1
12
11
7
6
4
1.8k
100k
100k
3k9
1.3V
2.6V
C
CC
V
IN
V
OUT
0
22
R
GT
R
VC
5
521 - 51 - 04
5
0
-10
-20
-30
-40
-50
-60
-70
-80
2k2
1M
10
1M
V
O
10
55
50
45
40
35
30
25
20
15
10
50
45
40
35
30
25
20
15
10
5
0
60
50
40
30
20
10
0
GAIN (dB)
GAIN (dB)
OUTPUT (dBV)
-120 -100 -80 -60 -40 -20 -0
INPUT LEVEL (dBV)
Fig. 5 Input vs Output
R
VC
=100k
R
VC
=33k
20 100 1k 10k 20k
FREQUENCY (Hz)
Fig. 6 Gain vs Frequency
V
IN
=-60dBV
TRANSDUCER CURRENT (
A)
1k
100
60
-120 -100 -80 -60 -40 -20
INPUT (dBV)
Fig. 7 Transducer Current vs Input
THD (%)
10 100 1k 10k 100k
FREQUENCY (Hz)
Fig. 9 Stage A and Stage B Open Loop Gain
R
VC
=10k
R
VC
=3k3
R
VC
=1k
R
VC
=100k
R
VC
=33k
R
VC
=10k
R
VC
=3k3
R
VC
=1k
R
VC
=33k
R
VC
=100k
R
VC
=10k
R
VC
=3k3
R
VC
=1k
-90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20
INPUT (dBV)
Fig. 8 Distortion vs Input
Stage B
Stage A
R
VC
=33k
R
VC
=100k
R
VC
=10k
R
VC
=3k3
R
VC
=1k
= 3kHz
6
521 - 51 - 04
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.
Pad sizes 0.021 x 0.029 (0.53 x 0.74).
Dimension tolerances:
0.003 (+0.08) unless otherwise stated.
Pad numbers for illustration only.
XXXXXX - work order number.
This hybrid is designed to be reflowable for Gennum's reflow process profile.
For more information contact Gennum Corporation.
Fig. 10 Hybrid Layout & Dimensions
0.180
(4.57)
0.075
(1.91)
12
11
10
9
8
7
6
5
4
3
2
1
B
OUT
GND
V
REG
IN
BR
IN
B
IN
RE
A
OUT
A
IN
V
B
OUT
CC
Max 0.064
(1.63)
XXXXXX
34
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.
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 1996 Gennum Corporation. All rights reserved. Printed in Canada.
REVISION NOTES:
Correction to Typical Assembly Diagram.
GENNUM CORPORATION
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
GENNUM JAPAN CORPORATION
C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081,
Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839
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