TDA7404DTR Datasheet, PDF (15/35 Pages) STMicroelectronics – Car radio signal processor

TDA7404
Description of functionality
4.4
4.4.1
Loudness
There are four parameters programmable in the loudness stage:
Attenuation
Figure 5 shows the attenuation as a function of frequency at f_C = 400 Hz.
Figure 5. Loudness attenuation @ f_C = 400 Hz
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0
-5
- 10
- 15
4.4.2
- 20
10
100
1K
10K
Center frequency
Figure 6 shows the three possible peak-frequencies 400 Hz, 800 Hz and 2.4 kHz.
Figure 6. Loudness center frequencies @ Attn. = 15 dB
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