ICs for Audio Common Use
s
Overview
The AN7384N is a volume control IC for recording level
adjustment of cassette deck and mini component stereo.
s
Features
High input dynamic range
Low output noise voltage
Capable of selecting two kinds of control mode
(1) L, R, independent volume
(2) Coalition volume + L, R balance
Reference voltage source for control voltage built-in
AN7384N
Electronic Volume IC for Cassette Deck
1
2
3
4
5
6
7
8
3.8
0.25
(3.45)
0.51min
2.54
1.2
0.25
0.5
0.1
Unit : mm
6.3
0.25
16
15
14
13
12
11
10
9
21.7
0.3
3 ~ 15
0.3
+ 0.1
0.05
7.62
0.25
16-Lead DIP Package (DIP016-P-0300E)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
VCA
VCA
Buf.
Buf.
VCA Control
V
REF
GND3
V
EE
(SUB)
GND2
GND1
V
CC
Mode
SW.
NC
s
Block Diagram
AN7384N
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
12
30
800
20 ~ + 70
55 ~ +150
7V ~
11V
s
Recommended Operating Range
(Ta = 25C)
Parameter
Symbol
Range
Operating Supply Voltage Range
V
CC
Positive Side Circuit Current
Negative Side Circuit Current
Attenuation 1
Attenuation 2
Channel Balance 1
Distortion Rate 1
Distortion Rate 2
Noise Output Voltage 1
Noise Output Voltage 2
Channel Balance 2
Max. Input Voltage
Max. Output Voltage
Control Voltage Range
Volume Mode Switching Voltage
Balance Mode Switching Voltage
Balance Mode Control Gain (Lch.)
Balance Mode Channel Balance
I
CC
I
EE
ATT 1 *
1
ATT 2 *
1
CB 1 *
1
THD 1 *
1
THD 2 *
1
V
no
1 *
1
V
no
2 *
1
CB 2 *
1
V
i (max.)
*
1
V
O (max.)
*
1
V
cont
*
1
V
10 (V)
V
10 (B)
ATT
BG
CB 3
V
in
= 0dBV, Volume mode, V
cont
= V
ref
V
in
= 0dBV, Volume mode, V
cont
= V
ref
V
in
= 0dBV, Volume mode, V
cont
= V
ref
V
in
= 0dBV, Volume mode, V
cont
= 0V
V
in
= 0dBV, Volume mode, V
cont
= V
ref
V
in
= 20dBV, Volume mode, V
cont
= V
ref
V
in
= 0dBV, Volume mode, at V
cont
= 20dB
Without input (R
g
=
0
), Volume mode, V
cont
=
V
ref
, A curve
Without input (R
g
=
0
), Volume mode, V
cont
=
0V, A curve
V
in
= 0dBV, Volume mode, at ATT= 20dB
THD= 3%, ATT= 20dB
THD= 3%, V
cont
= V
ref
Volume mode, Input 20dBV V
cont
to Pin5, V
7
= 0.5V
ref
Volume mode, Input 20dBV V
cont
to Pin5, V
7
= 0.5V
ref,
L/R
20
1
2
3
14.8
1.5
0
0
3.5
22
3
12
9.1
0
85
0
0.05
0.15
106
0
16
20
0
20
1
80
2
0.1
0
100
110
3
V
ref
1.5
4.8
18
3
mA
mA
dBV
dBV
dB
%
%
dBV
dBV
dB
dBV
dBV
V
V
V
dBV
dB
Parameter
Symbol
Condition
min.
typ.
max.
Unit
*1 2-channel
*2 Filter of 18dB/oct should be used at measurement.
*
2
*
2
s
Electrical Characteristics
(V
CC
=
10V, Ta = 25C)
Independent Volume Mode Attenuation Characteristics
0
20
40
60
80
V
cont
(V)
A
t
t
e
n
u
a
t
i
o
n
(
d
B
)
2
0
1
5
4
3
V
in
= 0dB 1kHz
Balance Mode Attenuation Characteristics
0
10
20
30
40
50
60
70
80
90
Pinu V (V)
A
t
t
e
n
u
a
t
i
o
n
(
d
B
)
2
0
1
5
4
3
V
IN
= 0dBV
f= 1kHz
V
cont.1
SLO
(Without Enter)
V
Out
= 0dBV
V
Out
= 40dBV
V
Out
= 20dBV
V
REF
s
Characteristics Curve
ICs for Audio Common Use
AN7384N
s
Application Circuit
15
16
14
13
12
11
10
9
2
1
3
4
5
6
7
8
+
+
V
EE
(SUB)
10 (V)
47
F
V
INB
24k
47
F
B.P.
2
4
k
VCA
VCA
GND3
V
out
B
B.P.
47
F
GND2
N.C.
V
REF
Bal mode
Vol. mode
V
REF
Mode
SW.
VCA Control
Buf.
Buf.
GND1
V
CC
+
10 (V) 47
F
V
IN
A
24
k
47
F
B.P.
24k
47
F
B.P.
V
out
A
10kB
B typ.
10kB
B typ.
1. Voltage of Pin 7 becomes center at 1/2 V
REF
in case of using at balance mode.
2. Coupling capacitor of output can be excluded according to system specifications.
Description
Equivalent Circuit
Pin No.
Pin Name
Positive Side Power Supply
2
15
Input Pin
4
13
Output Pin
5
A-ch. Control
Voltage Input
1
A-ch. GND
3
7
B-ch. Control
Voltage Input
Each channel input pin
Pin2 ch. A
Pin15 ch. B
Each channel output pin
Pin4 A-ch.
Pin13 B-ch.
Control DC input pin
Pin11Low A-ch. side independent control
Pin11Low A, B-ch. balance control
Positive side supply voltage pin
A-ch. side VCA system GND pin
Control DC input pin
Pin11High B-ch. side independent control
Pin11High A, B-ch. balance control
1.8k
2
15
20
A
4
13
1.8k
5
30
A
Impedance
s
Pin Descriptions
AN7384N
ICs for Audio Common Use
Equivalent Circuit
Impedance
Description
Pin No.
Pin Name
NC
10
Volume Mode/Balance
Mode Switching
6
A-ch. Control
Voltage Output
9
GND
12
8
B-ch. Control
Voltage Output
Control mode switching pin
Low independent volume control
High coalition volume balance control
mode
Control DC voltage buffer output pin
Control system GND pin
Control voltage buffer output input to
Pin7
11
Reference voltage output pin
B-ch. GND
14
B-ch. side VCA system GND pin
Negative Side Power Supply
16
Negative side supply pin
6
8
10
V
ref
2
11
Reference Voltage
Output
s
Pin Descriptions (Cont.)
Supplementary Explanation
Electrical Caracteristics Design Reference Value
Crosstalk
Control Voltage at 20dB
Attenuation Characteristics
Attenuation Characteristics Balance
The ratio of V
cont.1
to V
ref
Control Power Supply
CT
V
cont1
SLO
ATTB
ATTV
V
ref
V
in
= 0dBV, V
cont
= V
ref
V
in
= 0dBV, V
out
= 20dBV
V
in
= 0dBV, V
cont.1
V
cont.
0.5V
V
in
= 0dBV, V
cont.
= V
cont.1
V
cont.
0.5V
1.8
15.5
1.4
0.25
4.8
85
2
12
0
0.4
5
80
2.2
9.5
1.4
0.55
5.2
dBV
V
dB
dB
dB
V
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Pin No.
5
7
Volume Mode
Volume Control
Volume Control
Balance Mode
Volume Control
Balance Control
Mode
Volume Mode
Operation Description
Control each channel independently
Control volume at Pin5 simultaneously.
Control right and left balance at Pin6
Balance Mode
Note) Center at 1/2V
ref
Operation Mode and Control Pin
This IC is an integrated circuit for +, 2 power supply.
When user use this IC at power supply, making reference voltage outside with OP amp. is needed.
As this IC is apt to be influenced by supply impedance, it needs capacitors of more than 47
F between V
CC
and GND, more
than 47
F between V
EE
and GND.
Precautions on Use
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