TDA7462 データシートの表示（PDF） - STMicroelectronics

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TDA7462

DUAL AUDIOPROCESSOR WITH COMPANDER AND SUBWOOFER OUTPUT

STMicroelectronics 

TDA7462

Subwoofer Application

Figure 14. Subwoofer Application with LPF

80/115Hz and HPF 90/130Hz

dB

0.0

-10.0

-20.0

-30.0

-40.0

-50.0

10.0

100.0

1.0K

10.0K Hz

VoiceBand Application

Figure 15. VoiceBand Application with HPF

180/260Hz and LPF 3k/6kHz

dB

0.0

-10.0

-20.0

-30.0

-40.0

-50.0

10.0

100.0

1.0K

10.0K Hz

Figure 16. Switchable configuration for Front/Rear processing

80Hz/115Hz

Speaker Attenuator

Due to practical aspects the steps in the speak-

erattenuators are not linear over the full range. At

attenuations more than 24dB the steps increase

from 1.5dB to 10dB (see data byte specification).

Subwoofer

The Subwoofer output is a differential mono out-

put with 6dB gain. The outgoing signal generated

by adding the left and the right channel. The at-

tenuator is exactely the same like the other

speakers.

In some applications it could be helpful to change

the phase of this output by software. For this pur-

pose a bit is available in the subwoofer byte to

change the phase from 0° to 180°.

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