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Multimedia ICs

Analog compander with vocal fader

for KARAOKE

BA7726AS / BA7726AFS

The BA7726AS and BA7726AFS are analog companders for karaoke echo systems and have internal logarithmic

compression and expansion circuits, a stereo line mixer amplifier, vocal fader function, vocal detection function,

microphone ALC, microphone ON / OFF switch, and output switch. When used together with the BU9252 8-bit digital

delay, these ICs form a high-grade karaoke echo system with minimum components.

1) Internal stereo line mixer amplifier, allowing selec-

tion of through output, left output, or right output.

2) Internal vocal elimination function, suitable for vocal

faders and left and right output.

3) Echo level and loop ratio are DC-adjustable with the

internal electronic volume control (EVR).

4) Internal microphone ON / OFF switch.

5) Vocal detection.

6) Internal microphone ALC function.

7) Internal anti-popping circuit.

Portable CD stereos with karaoke functions, VCRs, mini component stereo systems, LD players

Parameter

Symbol

Limits

Unit

Power supply voltage

14

V

Power dissipation

BA7726AS

mW

BA7726AFS

Operating temperature

Topr

°C

Storage temperature

Tstg

°C

Pd

– 10 ~ + 70

– 55 ~ + 125

Parameter

Symbol

Min.

Typ.

Max.

Unit

Power supply voltage

4.5

9.0

12.0

V