TDA7719TR データシートの表示（PDF） - STMicroelectronics

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TDA7719TR

3 band car audio processor

STMicroelectronics 

TDA7719

Description

Figure 3. QD and FD configuration of QD4/FD4

FULL DIFFERENTIAL

QUASI DIFFERENTIAL

FD4L+

1

QD4L

1

100k

100k

+

+

OUTL

-

-

FD4L-

2

100k

QD4G

2

100k

OUTL

FD4R+

1

100k

FD4R-

2

100k

1

QD4G

100k

+

OUTR

-

QD4R

2

100k

+

OUTR

-

4.1.2 Direct path

The input pins can be configured as direct path mode by setting Byte1 Bit5~Bit7. In direct

path mode the input pins are connected to dedicated mono fader directly, all the filters and

volume are bypassed. Below is described the assignment of the input pins and output fader

in direct path mode:

Pin5/QD2L

--> OUTLF

Pin6/QD2R

--> OUTRF

Pin7/QD3L

--> OUTLR

Pin9/QD3R

--> OUTRR

Pin10/FDL+_QD4L --> OUTL2

Pin13/FDR+_QD4R--> OUTR2

Note: 1 The configurations CFG2, CFG3 and CFG5 are not recommended in direct path mode.

Because in these 3 configurations SE4L/MD1+ and SE5R/MD2+ are connected to OUT2_L

and OUT2_R fader separately. In this case left and right channel of OUT2 belongs to

different input sources.

2 If the direct path is chosen, the input pins have to be used as single ended pins. In case of

differential inputs the ground or minus pins must be connect to GND by AC short.

3 Inputs in direct path mode are also selectable with front and rear selector.

Doc ID 13698 Rev 5

15/46

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