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BA3853BFS Datasheet(PDF) 10 Page - Rohm |
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BA3853BFS Datasheet(HTML) 10 Page - Rohm |
10 / 11 page 800 Audio ICs BA3853BFS FApplication notes (1) Power supply voltage range Operation of the basic functions of the application exam- ple circuit are guaranteed if operated within the stipulated power supply voltage and ambient temperature ranges. Rohm cannot guarantee the ratings for the electrical characteristics, but these will not change radically if the circuit is operated within the stipulated power supply volt- age and ambient temperature ranges. (2) Mute circuits Both the main volume and fader volume circuits have a built-in mute circuit. Mute is applied to all output pins. Mute logic (3) Loudness control (1) The loudness circuit is designed to work together with the main volume. (2) Maximum loudness change occurs when the signal attenuation is *30dB or lower. Up to a signal attenuation of *10dB, the circuit is designed to have a change in loudness of 0dB. (3) For signal attenuation between *10dB to *30dB, the change in loudness is smaller approaching *10dB, and gets larger approaching *30dB. (4) When loudness is operated during tone adjustment, if the amount of boost due to the combined tone boost and loudness exceeds the maximum boost, the circuit design ensures that the amount of loudness change will not exceed the maximum amount of tone boost (see Figs. 6 and 7). (5) Loudness is on when the pin voltage is below 2.5V, and off above 2.5V. (4) Balance / fader (1) Balance control curve The balance control curve has been designed so that at above 2.8V, channel 1 (1-Fr, 1-Rr) is attenuated, and at below 2.2V, channel 2 (2-Fr, 2-Rr) is attenuated. (2) Fader control curve The fader control curve has been designed so that at be- low 2.2V, the front (1-Fr, 2-Fr) is attenuated, and at above 2.8V, the rear (1-Rr, 2-Rr) is attenuated. (5) Input / output circuits Buffers are used before and after the signal input and output pins. |
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