WM8739 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8739

Stereo Audio ADC

Wolfson Microelectronics plc 

WM8739

RECOMMENDED EXTERNAL COMPONENTS

3.3V

10µF

7

DBVDD

0.1µF

1.5V - 3.3V

10µF

6 DGND

0.1µF

5

DCVDD

Advanced Information

AVDD 14

0.1µF

3.3V

AGND 15

10µF

Audio Serial Data I/F

3-wire Interface 3.3V 10kΩ

2-wire Interface

3-wire or 2-wire

MPU Interface

11 ADCDAT

12 ADCLRC

8 BCLK

WM8739

ADC

+

LLINEIN 18

470nF

47pF

5KΩ

5KΩ

RLINEIN

+

17

470nF

47pF

5KΩ

5KΩ

19 MODE

20 CSB

1 SDIN

2 SCLK

XTI/MCLK XTO

3

4

VMID 16

0.1µF

+

10µF

15pF

15pF

Notes:

1. AGND and DGND should be connected as close to the WM8739 as possible.

2. 0.1µF capacitors should be positioned as close the the WM8739 as possible.

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

are recommended for optimum performance.

Figure 29 External Components Diagram

AI Rev 2.2 September 2001

32

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