Production Data

WM2148

WOLFSON MICROELECTRONICS LTD

PD Rev 1.1 February 2001

3

PIN

NAME

TYPE

DESCRIPTION

27

D2

Digital I/O

Data Bit 2

28

D1

Digital I/O

Data Bit 1

29

D0

Digital I/O

Data Bit 0

30

DVDDLOGIC

Supply

Positive Supply Voltage for Logic Block

31

DVDDCLK

Supply

Positive Supply Voltage for Clock

32

CLK

Digital Input

Sample Clock

33

DGNDCLK

Supply

Ground for Clock

34

DGNDCTRL

Supply

Ground for Control Pins

35

OEB

Digital Input

Output Enable (active low)

36

WRB

Digital Input

Write Signal (active low)

37

CSB

Digital Input

Chip Select (active low)

38

NC

Test Output

This pin must be left unconnected

39

NC

Test Output

This pin must be left unconnected

40

A1

Digital Input

Address Bit 1

41

A0

Digital Input

Address Bit 0

42

DVDDCTRL

Supply

Positive Supply for Control Pins

43

AVDD1

Supply

Positive Supply for ADC

44

AGND1

Supply

Ground for ADC

45

AVSUB

Substrate

ADC substrate

46

AGND2

Supply

Positive Supply for ADC Op-amps

47

AVDD2

Supply

Ground for ADC Op-amps

48

IN+

Analogue Input

Positive Differential Analogue Input

Note:

1.

It is recommended that each pair of supply pins, especially the analogue supplies, have a separate decoupling

capacitor. The most critical are pins 46 and 47. The ADC substrate (pin 45) should be as noise free as possible.