WM8746

Advance Information

PP Rev 1.4 November 2001

27

RECOMMENDED EXTERNAL COMPONENTS

12

DVDD

DGND

ML/I2S

AGND1

AVDD1

CAP

C

13

C

12

AGND

1

11

Software I/F or

Hardware Control

WM8746

Notes:

1.

AGND and DGND should be connected as close to the WM8746 as

ibl

2.

C

ibl

3.

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

i performance.

AVDD2

AGND2

GR0

C

3

C

4

C

5

C

2

DVDD

C

1

13

MC/IWL

14

MD/DM

OUT0R

25

C

6

OUT0L

C

7

AC-Coupled

OUT0R/L

to External LPF

8

MODE

9

MUTE

27

AVDD

2

SCKI

3

BCKIN

4

LRCIN

6

DIN1

7

DIN2

Audio Serial Data I/F

DGND

AGND

GR1

GR2

OUT1R

21

C

8

OUT1L

C

9

AC-Coupled

OUT1R/L

to External LPF

23

OUT2R

17

C

10

OUT2L

C

11

AC-Coupled

OUT2R/L

to External LPF

19

10

LRCIN2

5

DIN0

28

15

20

24

+

26

22

18

+

+

+

+

+

+

16

+

+

Software/hardware

control mode select

Figure 24 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 15 External Components Description