BA7760F

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). Applications Audio equipment with karaoke features, VCRs, LDs, etc. 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. Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Power dissipation BA7760 BA7760F Symbol VCC Pd Topr Tstg Limits 15 600∗1 450∗2 – 25 ~ + 75 – 55 ~ + 125 Unit V mW °C °C Operating temperature Storage temperature ∗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. Recommended operating conditions Parameter Power supply voltage Symbol VCC Limits 6 ~ 14 Unit V 1 Multimedia ICs BA7760 / BA7760F Block diagram 3 MIC IN Ch1 ( + ) 1 RIPPLE FILTER 4 MIC IN Ch1 ( – ) 6 MIC OUT Ch1 5 FILTER Ch1 7 MIX IN 2 GND MUTE CTRL 13 – MIX BF + + – MIC AMP CH 1 MIC AMP CH 2 + – FILTER Ch2 10 MIC IN Ch...