ICs for Audio Common Use
s
Overview
The AN7337N is a graphic equalizer IC for high perfor-
mance Hi-Fi developed for deck. It incorporates output
buffer circuit and 7 resonance buffer circuits, can set res-
onance frequency by external capacitor.
s
Features
Low noise : V
no
= 4Vrms typ.
Low distortion : THD = 0.002% typ. (at V
O
= 1Vrms)
High output power : V
O
(max.)
= 9.5Vrms typ. (at. THD =
0.1%)
Wide operating supply voltage range : V
CC (opr.)
= 4 ~
18V
AN7337N
7-Element Graphic Equalizer IC for Hi-Fi
1
2
3
4
5
6
7
8
9
10
25.0
0.3
1.22
0.25
3 ~15
20
19
18
17
16
15
14
13
12
11
6.35
0.3
0.5
0.25
2.54
3.85
0.25
3.0
0.25
0.6
0.25
7.62
0.25
3.25
0.3
0.25
+ 0.1
0.05
20-Lead DIP Package (DIP020-P-0300A)
Unit : mm
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
+
+
+
+
+
+
+
V
CC
GND
+V
CC
Output Buffer
Resonance
Section7
Resonance
Section6
Resonance
Section5
Resonance
Section4
Resonance
Section3
Resonance
Section2
Resonance
Section1
+
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Block Diagram
AN7337N
ICs for Audio Common Use
s
Absolute Maximum Ratings
(Ta= 25C)
V
CC
I
CC
P
D
T
opr
T
stg
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
mA
mW
C
C
Parameter
Symbol
Rating
Unit
18
50
1,000
20 ~ + 75
55 ~ +150
Parameter
Symbol
Range
Operating Supply Voltage Range
V
CC
4V ~
18V
s
Recommended Operating Range
(Ta = 25C)
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Total Circuit Current
Voltage Gain FLAT
Voltage Gain BOOST
Voltage Gain CUT
Total Harmonic Distortion
Max. Output Voltage
Output Noise Voltage
Output Noise Voltage
I
CC
G
V (FLAT)
G
V (Boost)
G
V (CUT)
THD
V
O (max.)
V
no
V
no (max.)
V
in
= 0mV
f= 1kHz, V
in
= 10dBm
FLAT V
O
= 0dB,
V
in
= 10dBm
FLAT V
O
= 0dB,
V
in
= 10dBm
f= 1kHz, V
O
= 1Vrms
f= 1kHz, THD= 0.1%
Input Short, DIN/AUDIO
Input Short, ALL Boost
12
0.3
12
12
0.002
9.5
4
31
16
0
14
10.4
0.03
35
100
mA
dB
dB
dB
%
Vrms
Vrms
Vrms
8
0.6
10.4
14
8
s
Electrical Characteristics
(V
CC
=
15V, Ta = 25C)
V
O
= 1Vrms
Ta = 25C
THD V
CC
0.1
0.05
0.03
0.02
0.01
0.005
0.003
0.002
0.001
Supply Voltage V
CC
(V)
T
o
t
a
l
H
a
r
m
o
n
i
c
D
i
s
t
o
r
t
i
o
n
T
H
D
(
%
)
15
0
5
10
30
25
20
V
CC
V
no
Input Short
DIN/AUDIO
Total Flat
V
no
V
CC
10
8
6
4
2
0
Supply Voltage V
CC
(V)
O
u
t
p
u
t
N
o
i
s
e
V
o
l
t
a
g
e
V
n
o
(
V
)
12
0
4
8
24
20
16
THD V
O
1
0.3
0.1
0.03
0.01
0.003
Output Voltage V
O
(dBV)
T
o
t
a
l
H
a
r
m
o
n
i
c
D
i
s
t
o
r
t
i
o
n
T
H
D
(
%
)
20
0
40
20
V
CC
=
15V
f = 1kHz
Ta = 25C
CUT
Boost
FLAT
s
Characteristics Curve
AN7337N
ICs for Audio Common Use
Equivalent Circuit
Pin Name
Pin No.
Pin Voltage (V)
Description
1, 3,
5, 7,
9, 11,
13
Input
Center electric
potential (GND)
Resonance circuit input pin
2, 4,
6, 8,
10, 12,
14
Negative Feedback
Center electric
potential (GND)
Non Inverting Input
Center electric
potential (GND)
15
Output buffer circuit non-inverting
input pin
Inverting Input
16
Output buffer circuit inverting
input pin
Output
17
Output buffer circuit putput pin
Positive Power Supply
+15
18
Positive supply pin
GND
0
19
GND pin
Negative Feedback
15
20
Negative supply pin
1
V
CC
+ V
CC
1
2
16
V
CC
+ V
CC
IN
15
16
+V
CC
V
CC
33k
33
F
IN
17
V
CC
+V
CC
OUT
+
Resonance circuit negative feed-
back pin
Center electric
potential (GND)
Center electric
potential (GND)
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Pin Descriptions
Center electric
potential
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