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Multimedia ICs
Microphone Amplifier
BA7760 / BA7760F
The BA7760 and BA7760F are dual microphone amplifiers designed for audio signal amplification. These are low
noise amplifiers with a low -122dBV (typically) equivalent input noise voltage. Each IC has an internal mixer buffer
amplifier for the mixing of signals from two channels. When used with the BA7725S or BA7725FS, the BA7726AS or
BA7726AFS and BU9252S or BU9252F, these ICs simplify the configuration of digital echo systems with two inputs
(for karaoke duets, for instance).
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Features
1) Internal 2-channel low noise microphone amplifier.
2) Internal mixer buffer amplifier with mute function.
3) Available in 2 types of packages: DIP 14-pin or SOP
14-pin.
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Applications
Audio equipment with karaoke features, VCRs, LDs, etc.
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Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Applied voltage 15 V
BA7760
mW
BA7760F
Operating temperature °C
Storage temperature °C
VCC
Power
dissipation
600
* 1
450
* 2
Pd
Topr – 25 ~ + 75
– 55 ~ + 125Tstg
*
1 Unmounted. Reduced by – 6.0mW for each increase in Ta of 1°C over 25°C.
*
2 Unmounted. Reduced by – 4.5mW for each increase in Ta of 1°C over 25°C.
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Recommended operating conditions
Parameter Symbol Limits Unit
Power supply voltage VCC 6 ~ 14 V