BA3430F Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BA3430F

Stereo pre-amplifiers with mute detection circuits for car stereos

ROHM Semiconductor 

Audio ICs

BA3430S / BA3430F / BA3430FS

5) Gain settings for the mute detection circuit

The gain settings for the mute detection circuit are shown below. The reference voltage of the comparator circuit is set

at VCC / 30.

As an example, when VCC = 9V and f = 5kHz, the mute

detection level during playback is obtained as follows:

a. The reference voltage of the comparator circuit is V =

VCC / 30 = 0.3V, therefore, the circuit will operate at an AC

input of 0.3 / 2Vrms = *13.5dBV or more.

b. From the above chart, the gain at 5kHz during play-

back is 80dB.

c. Therefore, the output / input level of mute detection is

*13.5 * 80 = *93.5dBV.

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