Page 1
ICs for Audio Common Use
■ Overview
The AN7062N is a high voltage integrated circuit designed for pre-driver of 60W-class Hi-Fi audio amp.
Stereo operation is enabled due to two amplifiers built-in.
■ Features
•
High voltage
•
Low noise : V
ni
= 2.5µV (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)
■ 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
Page 2
ICs for Audio Common Use
AN7062N
■ Absolute Maximum Ratings (Ta= 25˚C)
+ 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
■ Electrical Characteristics (V
CC
= ± 70V, f = 20kHz, Ta = 25˚C)
Plus Side Supply Current
Minus Side Supply Current
I
tot – 1
I
tot – 2
Vi = 0mV
V
i
= 0mV
2.5
1.5
5
2.8
7.5
4.5mAmA
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
Vi = 0mV, Rg = 0Ω
V
O
= 30V
V
O
= 30V
V
i
= 0mV, Rg = 0Ω,
DIN – A Filter, f = 20Hz ~ 20kHz,
–12dB/OCT
0.14
0.5
0.003
95
1.5
0.01
mV
%
dB
1 mV
PD – Ta
0
0
0.6
0.8
1.0
Ambient Temperature Ta (˚C)
Power Dissipation P
D
(W)
0.4
0.2
40 120 160 200
80
Page 3
ICs for Audio Common Use
AN7062N
THD – f
0
10
0.006
0.008
0.010
0.020
100
Frequency f (Hz)
Total Harmonic Distortion THD (%)
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
(Ω)
Total Harmonic Distortion THD (%)
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
■ 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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