CS4922

27

8

PIN DESCRIPTIONS

Power Supplies

VD1, VD2, VD3, VD4 - Positive Digital Power Supply, PINS 7, 17, 25, 43.

The +5V supply is connected to these pins to power the various digital subcircuits on the chip.

See decoupling section in this data sheet for decoupling recommendations.

DGND1, DGND2, DGND3, DGND4 - Digital Ground, PINS 6, 18, 26, 42.

Digital power supply ground.

VA+ - Positive Analog Power Supply, PIN 34.

The analog +5V supply for the analog-to-digital converter and the PLL. Analog performance is

highly dependent on the quality of this supply. See decoupling section in this data sheet for

decoupling recommendations.

AGND1, AGND2 - Analog Ground, PIN 33, 36.

Analog power supply ground.

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18

20

22

24

26

28

1

2

4

640

42

44

12

8

10

14

16

7

9

11

13

15

17

29

31

33

35

37

39

34

30

32

36

38

CDIN

CS

SCK/SCL

REQ

SDA/CDOUT

TX

DGND1

VD1

AUXOUT

AUXIN

AUXLR

AUXCLK

DBCLK

DBDA

XF4

XF3

XF2

VD2

DGND2

90_CLK

XF1

SDATA

SCLK

VD4

DGND4

RESET

BOOT

AOUTR

AOUTL

AOUTM

AGND2

NC

VA+

AGND1

NC

FLT

PIO

EXTCK

ALTCLK

CLKIN

DGND3

VD3

CLKOUT

FSYNC

CS4922