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EN 42
9.
VAD 8031
IC7408,7409 BA5995: Servo Board, 4-channel BTL driver
IC actuator and motor drive
28
27
PreV
CC
1
2
Pin name
Pin No.
1
BIAS IN
Input for bias-amplifier
2
OPIN1 (+)
Non inverting input for CH1 OP-AMP
3
OPIN1 ( )
Inverting input for CH1 OP-AMP
4
OPOUT1
Output for CH1 OP-AMP
5
IN2
Input for CH2
6
MUTE
Input for CH1 mute control
7
STBY2
Input for CH2 stand by control
8
GND
Substrate ground
9
PowV
1
V
CC
10
PowV
2
V
CC
11
V
( )
Inverted output of CH2
O2
12
V
(+)
Non inverted output of CH2
O2
13
V
( )
Inverted output of CH1
O1
14
V
(+)
Non inverted output of CH1
O1
Note) Symbol of + and
(output of drivers) means polarity to input pin.
(For example if voltage of pin4 high, pin14 is high.)
Circuit Descriptions, Abbreviation List, and Datasheets
26
25
24
23
22
20k
10k
10k
+
+
+
+
10k
20k
10k
MUTE
STBY
ch1
ch2
3
4
5
6
7
Function
for CH1 power block
CC
for CH2 power block
CC
21
20
19
PowV
CC
STAND BY
(ch3 / 4)
ch1 / 3 / 4
20k
10k
20k
10k
PowV
PowV
CC
CC
(ch1)
(ch2)
8
9
10
Pin No.
Pin name
15
V
(+)
O4
16
V
( )
O4
17
V
(+)
O3
18
V
( )
O3
19
PowV
3
CC
20
STBY1
21
GND
22
OPOUT3
23
OPIN3 ( )
24
OPIN3 (+)
25
OPOUT4
26
OPIN4 ( )
27
OPIN4 (+)
28
PreV
CC
18
17
16
15
10k
10k
10k
10k
ch3
ch4
10k
10k
10k
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
10k
10k
10k
ch2
ch1
10k
10k
10k
10k
11
12
13
14
Resistor unit : [ ]
Function
Non inverted output of CH4
Inverted output of CH4
Non inverted output of CH3
Inverted output of CH3
V
for CH3/4 power block
CC
Input for CH1/3/4 stand by control
Substrate ground
Output for CH3 OP-AMP
Inverting input for CH3 OP-AMP
Non inverting input for CH3 OP-AMP
Output for CH4 OP-AMP
Inverting input for CH4 OP-AMP
Non inverting input for CH4 OP-AMP
V
for pre block
CC
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