TDA7406T Datasheet, PDF (11/49 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

TDA7406T
2.3 Loudness
There are four parameters programmable in the loudness stage:
s Attenuation: 0 to -19dB attenuation in 1dB steps vs. frequency (see the response at f_P = 400Hz in Figure 2).
s Peak Frequency: Four programmable peak frequencies: 200,400,600 and 800Hz (see Figure 3).
s Filter Order: First or second order frequency response (see Figure 4).
s Flat mode: Selectable flat-mode. In flat mode the loudness stage works as a 0dB to -19dB attenuator.
Figure 2. Loudness Attenuation @ f_P = 400Hz.
0.0
-5.0
-10.0
dB
-15.0
-20.0
-25.0
10.0
100.0
1.0K
Hz
10.0K
Figure 3. Loudness Center frequencies @ Attn. = 15dB
0.0
-5.0
dB
-10.0
-15.0
-20.0
10.0
100.0
1.0K
Hz
10.0K
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