TDA7719 datasheet(15/45 Pages) STMICROELECTRONICS

Numer części	TDA7719

Szczegółowy opis	3 band car audio processor

PDF	45 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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15 / 45 page

TDA7719

Description

15/45

Figure 3.

QD and FD configuration of QD4/FD4

4.2

Mixing

The device provides mixing function which allows the mixing source mixed into front and

rear speaker output independently. The mixing source can be any single-ended input,

mono-differential input or beep input (Mono single-ended input when DC offset detector is

not used). In order to adjust the level of mixing signal, the mixing selector is followed with a

0dB~-31dB attenuator. The maximum mixing input signal level is 1.6Vrms for single-ended

input and mono-differential input. For beep input, the maximum input signal level is about

1.4Vrms. The block diagram of the mixing function is shown below.

Figure 4.

Block diagram of mixing stage

FULL DIFFERENTIAL

100k

FD4L+

FD4L-

100k

FD4R+

FD4R-

QUASI DIFFERENTIAL

100k

QD4L

OUTL

OUTR

OUTL

OUTR

QD4G

100k

QD4G

QD4R

Mixing

Selector

SE Inputs

MD Inputs

Beep

0~-31dB

Speaker

Attenuator

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