BA7725 ROHM Electronics, BA7725 Datasheet - Page 3

• Manufacturer Part Number: BA7725
• Description: Analog Compander for Karaoke echo Systems
• Manufacturer: ROHM Electronics

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Multimedia ICs
BA7725S
Pin descriptions
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
9
Pin No.
BA7725FS
10
11
12
13
14
15
16
17
18
19
20
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1
2
3
4
5
6
7
8
9
LINE OUT
LINE IN
N.C.
ECHO LEV CTRL
GND
LOOP GAIN CTRL
EXP DET
EXP DET CT
EXP BF OUT
EXP BF IN
DLY BF OUT
DLY BF IN
CMP BF OUT
CMP BF IN
CMP OUT
CMP DET CT
CMP DET
RIPPLE FITER
V
N.C.
MIC AMP OUT
MIC AMP IN
CC
Pin name
Line output
Line input
Microphone turns off when voltage drops below 1V.
Set echo signal damping ratio between 2-9V (Vcc = 9.0V).
Ground
Setting the loop damping ratio. Set between
2-9V (Vcc = 9.0V).
Expand detection
Setting expand attack / recovery time
Attack (R) = 5.6k , recovery (R) = 85.6k
LPF BF output (expansion)
LPF BF input (expansion)
Echo signal input BF output
Echo signal input BF input
LPF BF output (compression)
LPF BF input (compression)
Compression output
Setting the compression attack / recovery time
Attack (R) = 5.6k , recovery (R) = 85.6k
Compression detection
Attached ripple rejection capacitor
V
Microphone amplifier output
Microphone amplifier input
CC
Function
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BA7725S / BA7725FS
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