TDA7419_09 Datasheet, PDF (15/40 Pages) STMicroelectronics – 3 band car audio processor

TDA7419
Description of the audio processor
– programmable Q factor for different visual appearance
– analog output
– controlled by external serial clock
● Speaker
– 4 independent soft-step speaker controls, +15dB to -79dB with 1dB steps
– Independent programmable mix input with 50% mixing ratio for front speakers
– direct mute
● Subwoofer
– 2nd order low pass filter with programmable cut off frequency
– single-ended mono output independent soft-step level control, +15dB to -79dB
with 1dB steps
● Mute functions
– direct mute
– digitally controlled Soft-mute with 3 programmable mute-
times(0.48ms/0.96ms/123ms)
● Effect
– gain effect, or high pass effect with fixed external components
4.2
4.2.1
4.2.2
Input stages
In the basic configuration, one stereo quasi-differential and three (two in case of HPS
applications) single ended stereo inputs are available.
Quasi-differential stereo input (QD)
The QD input is implemented as a buffered quasi-differential stereo stage with 100 kΩ input-
impedance at each input. The attenuation is fixed to -3 dB in order to adapt the incoming
signal level.
Single-ended stereo input (SE1, SE2, SE3/AC2IN)
The input impedance at each input is 100 kΩ and the attenuation is fixed to -3dB for
incoming signals. The input for SE3 is also configurable as part of the interface for external
filters in HPS applications (AC2IN)
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