WM8706

Product Preview

WOLFSON MICROELECTRONICS LTD

PP Rev 1.2 April 2001

22

RECOMMENDED EXTERNAL COMPONENTS

28

DVDD

DGND

MLIIS

AGND

AVDD

VMID

C

9

C

8

AGND

8

7

Software I/F or

Hardware Control

WM8706

Notes:

1. AGND and DGND should be connected as close to the WM8706 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

27

MCDM1

26

MDDM0

VOUTR

16

C

6

VOUTL

C

7

AC-Coupled

VOUTR/L

to External LPF

24

MODE

25

MUTEB

13

AVDD

5

XTI

3

BCKIN

2

DIN

Audio Serial Data I/F

DGND

AGND

1

LRCIN

15

20

14

19

+

18

+

+

Software/hardware

control mode select

21

ZERO

23

CSBIWO

Figure 22 External Components Diagram

RECOMMENDED EXTERNAL COMPONENT 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 24 External Components Description