TDA7402 データシートの表示（PDF） - STMicroelectronics

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TDA7402

Car Radio Signal Processor

STMicroelectronics 

TDA7402

Audioprocessor part

3.4.3

Peak frequency

Figure 5 shows the four possible peak-frequencies at 200, 400, 600 and 800Hz

Figure 5. Loudness center frequencies @ Attn. = 15dB.

0.0

-5.0

dB

) -10.0

uct(s -15.0

uct(s) - Obsolete Prod 3.4.4

-20.0

10.0

100.0

1.0K

Hz

10.0K

Loudness order

Different shapes of 1st and 2nd-order loudness

Figure 6. 1st and 2nd order loudness @ Attn. = 15dB, fP=400Hz

0.0

Prod -5.0

letedB

Obso -10.0

-15.0

-20.0

10.0

100.0

Hz

1.0K

10.0K

3.4.5

Flat mode

In flat mode the loudness stage works as a 0dB to -19dB attenuator.

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