ICs for Audio Common Use
s
Overview
The AN7062N is a high voltage integrated circuit de-
signed for pre-driver of 60W-class Hi-Fi audio amp.
Stereo operation is enabled due to two amplifiers built-in.
s
Features
High voltage
Low noise : V
ni
= 2.5V (typ.)
Low distortion : THD = 0.003% (typ.)
Good channel separation
Wide operating supply voltage range
AN7062N
High Voltage Input Amplifier Circuit for Hi-Fi Power Amplifier
1
2
3
4
5
6
7
8
3 ~ 15
7.62
0.25
0.3
+ 0.1
0.25
3.8
0.25
(3.45)
0.51min.
2.54
1.2
0.25
0.5
0.1
Unit : mm
6.3
0.25
18
17
16
15
14
13
12
11
21.7
0.3
9
10
18-Lead DIP Package (DIP018-P-300E)
s
Block Diagram
4
5
6
7
8
9
11
12
13
14
15
16
17
1
18
10
3
2
GND
V
CC1
+V
CC
V
CC2
(L.F.B)
(L.F.B)
Current Mirror
Cascade
Bootstrap
Emitter
Follower
Differential
Amplifier
Current Mirror
Cascade
Bootstrap
Differential
Amplifier
Emitter
Follower
Current Mirror
Current Source
ICs for Audio Common Use
AN7062N
s
Absolute Maximum Ratings
(Ta= 25C)
+ V
CC
V
CC
I
CC
P
D
T
opr
T
stg
Supply Voltage
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
V
mA
mW
C
C
Parameter
Symbol
Rating
Unit
+ 74
16
10
800
25 ~ + 75
55 ~ + 150
s
Electrical Characteristics
(V
CC
=
70V, f
= 20kHz, Ta = 25C)
Plus Side Supply Current
Minus Side Supply Current
I
tot 1
I
tot 2
V
i
= 0mV
V
i
= 0mV
2.5
1.5
5
2.8
7.5
4.5
mA
mA
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Output Noise Voltage
Total Harmonic Distortion
Open Circuit Voltage Gain
Output Noise Voltage
V
no2
THD
G
VO
V
no1
V
i
= 0mV, R
g
= 0
V
O
= 30V
V
O
= 30V
V
i
= 0mV, R
g
= 0
,
DIN A Filter, f
= 20Hz ~ 20kHz,
12dB/OCT
0.14
0.5
0.003
95
1.5
0.01
mV
%
dB
1
mV
P
D
Ta
0
0
0.6
0.8
1.0
Ambient Temperature Ta (C)
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
P
D
(
W
)
0.4
0.2
40
120
160
200
80
ICs for Audio Common Use
AN7062N
THD f
0
10
0.006
0.008
0.010
0.020
100
Frequency f (Hz)
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
(
%
)
0.004
0.002
1k
10k
100k
V
CC
=
70V
V
O
= 30V
0.012
0.014
0.016
0.018
THD R
S
0
10
0.006
0.008
0.010
0.020
100
Source Resistance R
S
(
)
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
(
%
)
0.004
0.002
1k
10k
100k
0.012
0.014
0.016
0.018
V
CC
=
70V
V
O
= 30V
f
= 20kHz
Pin No.
Pin Name
1
2
3
4
5
6
7
8
9
GND
Input (Ch.1)
N.F.B (Ch.1)
Phase Compensation (Ch.1)
Phase Compensation (Ch.1)
Linear Feedback (Ch.1)
Linear Feedback (Ch.1)
Output (Ch.1)
+V
CC
s
Pin Descriptions
Pin No.
Pin Name
10
11
12
13
14
15
16
17
18
V
CC2
Output (Ch.2)
Linear Feedback (Ch.2)
Linear Feedback (Ch.2)
Phase Compensation (Ch.2)
Phase Compensation (Ch.2)
N.F.B (Ch.2)
Input (Ch.2)
V
CC1
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