TDA7461 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

TDA7461

Car radio signal processor

STMicroelectronics 

Description of the audio processor part

TDA7461

3.3.4

3.3.5

3.3.6

3.3.7

Figure 9. Soft step timing

VOUT

2dB

1dB

-1dB

10ms

Time

-2dB

D97AU635

1. For steps more than 1dB the soft step mode should be deactivated because it could generate a 1dB error

during the blend-time.

Bass

There are three parameters programmable in the bass stage (see Figure 10, 11, 12, 13):

● Attenuation

● Center Frequency (60, 70, 80 and 100 Hz)

● Quality Factors (1, 1.25, 1.5 and 2)

DC mode

In this mode the DC gain is increased by 4.4 dB. In addition the programmed center

frequency and quality factor is decreased by 25 % which can be used to reach alternative

center frequencies or quality factors.

Treble

There are two parameters programmable in the treble stage (see Figure 14, 15):

● Attenuation

● Center frequency (10, 12.5, 15 and 17.5 kHz).

Speaker attenuator

Due to practical aspects the steps in the speaker attenuator are not linear over the full

range. At attenuations more than 24 dB the steps increase from 1.5 dB to 10 dB (please see

data byte specification).

18/48

Share Link: