TDA7402 datasheet(15/59 Pages) STMICROELECTRONICS

No. de pieza	TDA7402

Descripción Electrónicos	CARRADIO SIGNAL PROCESSOR

PDF	59 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

Logo

15 / 59 page

15/59

TDA7402

1.6 SoftStep-Volume

When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks

could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audiosignal.

With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. The

blend-time from one step to the next is programmable in four steps.

Figure 6. SoftStep-Timing

Note: For steps more than 0.5dB the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time.

1.7 Bass

There are four parameters programmable in the bass stage:

1.7.1 Attenuation

Figure 7 shows the attenuation as a function of frequency at a center frequency of 80Hz.

Figure 7. Bass Control @ fC = 80Hz, Q = 1

1dB

0.5dB

-0.5dB

-1dB

SS Time

-1 5.0

-1 0.0

-5. 0

0.0

5.0

10.0

15.0

10 .0

10 0.0

1.0K

10 .0K

TDA7402 Datasheet(PDF) 15 Page - STMicroelectronics