WM8729

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WOLFSON MICROELECTRONICS LTD

PP Rev 1.2 April 2001

13

RECOMMENDED EXTERNAL COMPONENTS

DVDD

DGND

AGND

AVDD

VMID

C

9

C

8

AGND

6

5

Hardware Control

WM8729

Notes:

1. AGND and DGND should be connected as close to the WM8729 as possible.

2. C

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

recommended for optimum performance.

VREFP

VREFN

C

3

C

4

C

5

C

2

DVDD

C

1

16

FORMAT

15

DEM

VOUTR

10

C

6

VOUTL

C

7

AC-Coupled

VOUTR/L

to External LPF

14

MUTEB

7

AVDD

4

MCLK

3

BCKIN

2

DIN

Audio Serial Data I/F

DGND

AGND

1

LRCIN

9

13

8

12

+

11

+

+

Figure 17 External Component Diagram

RECOMMENDED EXTERNAL COMPONENTS VALUES

COMPONENT

REFERENCE

SUGGESTED

VALUE

DESCRIPTION

C1 and C5

10

µF

De-coupling for DVDD and AVDD/VREFP

C2 to C4

0.1

µF

De-coupling for DVDD and AVDD/VREFP

C6 and C7

10

µF

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

C8

0.1

µF

C9

10

µF

Reference de-coupling capacitors for VMID pin.

Table 6 External Components Description