WM8756

Advance Information

AI Rev 1.3 October 2001

35

RECOMMENDED EXTERNAL COMPONENTS

DVDD

DGND

AGND1

AVDD1

CAP

C

13

C

12

AGND

44

15

WM8756

NOTES:

1.

AGND and DGND should be connected as close to the WM8756 as possible.

2.

C

3.

Capacitor types should be carefully chosen. Capacitors with very low ESR are recommended for optimum performance.

AVDD2

AGND2

GR0

C

3

C

4

C

5

C

2

DVDD

C

1

OUT0R

34

C

6

OUT0L

C

7

AC-Coupled

OUT0R/L

to External LPF

36

AVDD

AGND

GR1

GR2

OUT1R

30

C

8

OUT1L

C

9

AC-Coupled

OUT1R/L

to External LPF

32

OUT2R

25

C

10

OUT2L

C

11

AC-Coupled

OUT2R/L

to External LPF

27

40

21

28

29

+

35

31

26

23

+

+

45

SCKI

46

BCKIN

47

LRCIN

1

DIN1

2

DIN2

Audio PCM Data I/F

48

DIN0

3

DSD0

4

DSD1

5

DSD2

7

DSD4

8

DSD5

Audio DSD Data I/F

6

DSD3

9

DSDCLK64

ML/I2S

Software I/F or

Hardware Control

Pins 20, 22, 24,

37-39 and 41are

no connects

DSDCLK128

10

AGND3

11

MODE

12

MUTE

DGND

16

17

MC/IWL

18

MD/DM

14

DSDB

13

LRCIN2

19

CSB

33

DMSLV

42

DMCKSEL

43

Figure 30 External Components Diagram

RECOMMENDED EXTERNAL COMPONENTS VALUES

COMPONENT

REFERENCE

SUGGESTED

VALUE

DESCRIPTION

C1 and C5

10

µF

De-coupling for DVDD and AVDD.

C2 to C4

0.1

µF

De-coupling for DVDD and AVDD.

C6 to C11

10

µF

Output AC coupling caps to remove midrail DC level from outputs.

C12

0.1

µF

C13

10

µF

Reference de-coupling capacitors for CAP pin.

Table 24 External Components Description