BA7725 データシートの表示（PDF） - ROHM Semiconductor
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コンポーネント説明
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BA7725 Datasheet PDF : 8 Pages
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Multimedia ICs
•Pin descriptions
Pin No.
BA7725S BA7725FS
Pin name
1
1
LINE OUT
2
2
LINE IN
3
—
N.C.
4
3
ECHO LEV CTRL
5
4
GND
6
5
LOOP GAIN CTRL
7
6
EXP DET
8
7
EXP DET CT
9
8
EXP BF OUT
10
9
EXP BF IN
11
10
DLY BF OUT
12
11
DLY BF IN
13
12
CMP BF OUT
14
13
CMP BF IN
15
14
CMP OUT
16
15
CMP DET CT
17
16
CMP DET
18
17
RIPPLE FITER
19
18
VCC
20
—
N.C.
21
19
MIC AMP OUT
22
20
MIC AMP IN
BA7725S / BA7725FS
Function
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) = 5.6kΩ, recovery (R) = 85.6kΩ
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) = 5.6kΩ, recovery (R) = 85.6kΩ
Compression detection
Attached ripple rejection capacitor
VCC
—
Microphone amplifier output
Microphone amplifier input
3
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