WM8738EDR 参数 Datasheet PDF下载

WM8738

APPLICATIONS INFORMATION

RECOMMENDED EXTERNAL COMPONENTS

Production Data

DVDD

1

+

C

1

C

2

14

DGND

DVDD

AVDD

AGND

9

C

3

10

C

4

AVDD

+

AGND

DVDD

4

R

FMT

LIN

8

C

5

R

C

6

1

Hardware

Control

2

WM8738

DVDD

11

R

3

NOHP

RIN

7

C

7

R

C

8

4

13

Audio Serial Data I/F

3

12

2

MCLK

BCLK

LRCLK

SDATO

VREF

6

C

9

C

10

+

CAP

5

C

11

AGND

C

12

+

AGND

Notes:

1. AGND and DGND should be connected as close to the WM8738 as possible.

2. C

2

, C

3

, C

9

and C

11

should be positioned as close to the WM8738 as possible.

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

performance.

Figure 9 External Components Diagram

RECOMMENDED EXTERNAL COMPONENTS VALUES

COMPONENT

REFERENCE

C1 and C4

C2 and C3

C5 and C7

C6 and C8

R2 and R3

R1 and R4

C9

C10

C11

C12

SUGGESTED

VALUE

10µF

0.1µF

1µF

4.7nF

10kΩ

680Ω

0.1µF

10µF

0.1µF

10µF

Reference de-coupling capacitors for CAP pin

DESCRIPTION

De-coupling for DVDD and AVDD

De-coupling for DVDD and AVDD

Analogue input AC coupling caps

Analogue input filtering (RC) capacitor

Current limiting resistors

Analogue input filtering (RC) resistor

Reference de-coupling capacitors for VREF pin

Table 3 External Components Description

w

PD Rev 4.3 November 2004

13