®

PCM1720

13

AC-3 APPLICATION

Figure 13 shows the typical circuit diagram for Dolby AC-3, 5.1 channel system.

FIGURE 13. Connection Diagram for a 6-Channel AC-3 Application.

15

14

16

2

SCKO

LRCKO

SERO_0

SERO_1

SERO_2

SYSCKI

BCKIN

LRCIN

DIN

SCKI

ML

MC

MD

RSTB

V

CAP

V

ZERO

Master Clock

Generator

or

PLL

Reset

µP

STRB

SCKO

SDO

+5V Analog

Post

Low Pass

Filter

10µF

+

Three-wire I/F

(Serial I/O)

3

20

PCM1720

PCM1720

PCM1721

19

DGND

AC-3

Audio

Decoder

V

DD

AGND

V

CC

4

5

6

7

9

8

12

13

Analog

Mute

Analog Out

Post

Low Pass

Filter

Analog

Mute

Analog Out

Mute

Control

+5V Analog

10

11

200

Ω

15

14

16

2

BCKIN

LRCIN

DIN

SCKI

ML

MC

MD

RSTB

V

CAP

V

ZERO

+5V Analog

Post

Low Pass

Filter

10µF

+

20

19

DGND

V

DD

AGND

V

CC

4

5

6

7

9

8

12

13

Analog

Mute

Analog Out

Post

Low Pass

Filter

Analog

Mute

Analog Out

Mute

Control

+5V Analog

10

11

200

Ω

17

16

18

BCKIN

LRCIN

DIN

SCKO

SCKI

MCKI

ML

MC

MD

V

CAP

V

ZERO

+5V Analog

Post

Low Pass

Filter

10µF

+

22

23

21

3

DGND

PGND

V

DD

V

DP

AGND

RSTB

V

CC

6

7

8

9

11

10

14

15

2

4

1

Analog

Mute

Analog Out

Post

Low Pass

Filter

Analog

Mute

Analog Out

Mute

Control

+5V Analog

12

13

200

Ω

19

+

10µF

+

3.3µF

10µF

+

3.3µF

+

10µF

+

3.3µF

+

Not Recommended For New Designs