TDA7419_09 Datasheet, PDF (26/40 Pages) STMicroelectronics – 3 band car audio processor

Description of the audio processor
Figure 20. Timing of the spectrum analyzer
TDA7419
4.11
AC coupling
In some applications additional signal manipulations are desired, such as additional band
equalizations. For this purpose, an AC coupling can be placed before the loudness
attenuator or speaker-attenuators, which can be activated or internally shorted by I²C bus.
In short condition, the input-signal of the speaker-attenuator is available at the AC outputs.
The input-impedance of this AC inputs is 50 kΩ.
Figure 21. Diagram of AC coupling
ACOUTL ACOUTR
ACINL
ACINR
From Input MUX
InGain
Filters
Speakers
To Output
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