WM9709

Production Data

w

PD Rev 1.3 February 2003

14

RECOMMENDED EXTERNAL COMPONENTS

3

DVDD

DGND

19

20

AGND

AVDD

DVDD

AVDD

DGND

AGND

CAP

XTLOUT

5

XTLIN

4

13

SDATAOUT

6

BITCLK

7

SDATAIN

9

SYNC

10

RESETB

1

AC-LINK

DGND

C4

C9

XT

C10

C1

Notes:

1. C1 to C5 should be as close to

WM9709 as possible.

2. AGND and DGND should

be connected as close to

WM9709 as possible.

14

STEREO

OUTPUT

16

LINEOUTL

17

LINEOUTR

C7

C8

+

+

NC

NC

NC

15

12

8

11

AGND

C2

C3

18

NC

AGND

C6

+

C5

2

ID

Figure 11 External Components Diagram

RECOMMENDED EXTERNAL COMPONENT VALUES

COMPONENT

REFERENCE

SUGGESTED

VALUE

DESCRIPTION

C1 to C4

0.1

µF + 1uF

De-coupling for DVDD and AVDD

C5

0.1

µF

C6

10

µF

Reference de-coupling capacitors for DAC

C7 to C8

10

µF

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

C9 and C10

22pF

Optional capacitors for better crystal frequency stability.

XT

24.576 MHz

WM9709 master clock frequency. A bias resistor is not required, but if connected will not

affect operation if value is large (above 1M

Ω).

Table 2 External Component Recommendations