BA3853 Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BA3853 Datasheet PDF : 11 Pages
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Audio ICs
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
BA3853BFS
(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.
800
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