REV. 0

AD9218

–7–

PIN FUNCTION DESCRIPTIONS

Pin No.

Mnemonic

Description

1, 12, 16, 27, 29, 32, 34, 45

GND

Ground

Analog Input for Channel A

3

AINA

Analog Input for Channel A (Complementary)

4

DFS/GAIN

Data Format Select and Analog Input Gain Mode. (Low = offset binary out-

put available, 1 V p-p supported; high = two’s complement output available,

1 V p-p supported; floating = offset binary output available, 2 V p-p supported;

5

Reference Voltage Input for Channel A

6

Internal Reference Voltage

7

Reference Voltage Input for Channel B

8

S1

User Select #1 (Refer to Table I)

9

S2

User Select #2 (Refer to Table I)

10

AINB

Analog Input for Channel B (Complementary)

11

Analog Input for Channel B

13, 30, 31, 48

Analog Supply (3 V)

14

Clock Input for Channel B

15, 28, 33, 46

Digital Supply (2.5 V to 3.6 V)

17–26

35–44

47

Clock Input for Channel A

PIN CONFIGURATION

36

35

34

33

32

31

30

29

28

27

26

25

13 14 15 16 17 18 19 20 21 22 23 24

1

2

3

4

5

6

7

8

9

10

11

12

48 47 46 45 44

39 38 37

43 42 41 40

PIN 1

IDENTIFIER

TOP VIEW

(Not to Scale)

GND

GND

GND

DFS/GAIN

S1

S2

GND

GND

AD9218

GND