BA7760 Rohm Semiconductor, BA7760 Datasheet
BA7760
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BA7760 Summary of contents
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... 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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... MIC AMP CH 1 – MIC AMP CH 2 – Function Base (NPN) // 15k Base (NPN) // 120k Base (NPN) Base (NPN) ~ 450 Push-pull Base (NPN) // 65k Push-pull Push-pull Base (NPN) ~ 450 Base (NPN) Base (NPN) // 120k Fig.1 BA7760 / BA7760F Pin type — — ...
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... B 8.3 10.5 — 50.0 66.5 — inB — – 110 – 100 B 2.12 2.62 3.12 BA7760 / BA7760F Unit Conditions mA — – 70dBV IN dBV Rg = 2.2k , DIN AUDIO V = – 40dBV IN % B.W. = 0.4 ~ 30kHz THD = 1% dBV B.W. = 0.4 ~ 30kHz – ...
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... F 2.2k • Circuit operation (Refer to “Application Example”) The BA7760 and BA7760F are dual microphone ampli- fiers. The audio signals from the microphones are input to pins 3 and 12. The gain at this time is determined by attached resistors and R6 / R7. By attaching capacitors to pins 5 and 10, the microphone amplifiers can be given frequency characteristics like those shown below ...
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... For DC loads, this volume control (VR) should be set above 4.5k to assure proper performance of the IC’s internal driver. • Application example 10k (VR 220 4 Mode MUTE MUTE MIX BF + – – – BA7760 / F Fig. 4 BA7760 / BA7760F Control signal Operation L Muted H Normal operation (VR 220 ...
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... Multimedia ICs • External dimensions (Units: mm) BA7760 19.4 0 2.54 0.5 0.1 DIP14 6 BA7760F 7. BA7760 / BA7760F 8.7 0 1.27 0.4 0.1 0.3Min. SOP14 0.15 ...