■
IU01 (BA7790LS)
1. FUNCTION
(1) Circuit essential for a standard sound signal processing system as a PB AMP, REC AMP, ALC circuit, EQ selecting
switch and high voltage head switch have been intergrated onto a single 1 chip.
(2) Built-in LINE/TUNER INPUT selecting switch.
(3) Built-in summary 3 mode EQ switch and it can be obtained EQ carateristics of each mode.
(4) PB AMP is low noise and high performance.
(5) Built-in ALC circuit with variable ALC level for setting.
(6) No shock noise or ALC attack noise is generated when power source is turned ON or the mode is changed by means
of a ALC loop outside mute system.
2. Absolute Maximum Ratings (Ta = 25°C)
※
Derate 4.0mW/°C for the operating above Ta = 25°C
3. Recommended Operational Conditions (Ta = 25°C)
55
PIN MODE
STOP
REC
PLAY
REW/FWD
REV/FF
PAUSE
STILL
1
0
0
0
0
0
0
0
2
4.6
4.6
4.6
4.6
4.6
4.6
4.6
3
0
0
0
0
0
0
0
4
0
0
0
0
0
0
0
5
11.2
11.2
11.2
11.2
11.2
11.2
11.2
6
4.7
4.7
4.7
4.7
4.7
4.7
4.7
7
11.4
11.4
11.4
11.4
11.4
11.4
11.4
8
4.7
4.7
4.7
4.7
4.7
4.7
4.7
9
0
0
3.8
0
3.7
0
0
10
4.7
4.7
4.7
4.7
4.7
4.7
4.7
11
0.6
0.6
5.2
0.6
5.2
0.6
5.2
12
5.3
5.3
5.3
5.3
5.3
5.3
5.3
13
4.6
4.6
4.6
4.6
4.6
4.6
4.6
14
0.6
0.6
0
0.5
0
0.5
0
15
5.4
5.4
5.3
5.4
5.3
5.4
5.4
16
5.3
5.3
5.3
5.3
5.3
5.3
5.3
17
0
0
0
0
5
0
5
18
5.3
5.3
5.3
5.3
5.3
5.3
5.3
19
5.4
5.4
5.3
5.3
5.4
5.4
5.4
20
0
0
0
0
0
0
0
21
5.4
5.4
5.3
5.4
5.4
5.4
5.4
22
5.4
5.4
5.3
5.4
5.4
5.3
5.3
23
0
0
0
1
0
0
0
24
0.5
5.2
0.5
0.5
0
0.5
0.5
Parameter
Symbol
Limits
Unit
Supply voltage
Vcc
13
V
Power dissipation
Pd
※
400
mW
Operating temperature
Topr
-10~+65
°C
Storage temperature
Tstg
-55~+125
°C
Parameter
Symbol
Range
Unit
Power supply voltage
Vcc
7.5~12.5
V
AUDIO IC BA7790LS
4. Pin Opertion
