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WM8569

w

PP Rev 1.1 December 2005

33

APPLICATIONS INFORMATION

RECOMMENDED EXTERNAL COMPONENTS

Figure 31 Recommended 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.

C8 and C9

1

µF

Analogue input high pass filter capacitors

C6 and C10

0.1

µF

C7 and C11

10

µF

Reference de-coupling capacitors for VMID and ADCREF pin.

C12

10

µF

Filtering for VREFP. Omit if AVDD low noise.

R1

33

Ω

Filtering for VREP. Use 0

Ω if AVDD low noise.

Table 11 Recommended External Components Description

Note: Further details for filtering on reference pins are available in Wolfson Application Note WAN0144.