TDA7404 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7404

Car radio signal processor

STMicroelectronics 

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 fC = 400 Hz.

Figure 5. Loudness attenuation @ fC = 400 Hz

5

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

5

0

-5

-10

-15

-20

10

100

1K

10K

15/35

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