AD6640

REV. 0

–5–

PIN FUNCTION DESCRIPTIONS

Pin No.

Name

Function

1, 2, 36, 37, 40, 41

+3.3 V/+5 V Power Supply (Digital). Powers output stage only.

3

ENCODE

Encode Input. Data conversion initiated on rising edge.

4

ENCODE

Complement of ENCODE. Drive differentially with ENCODE or bypass to

Ground for single-ended clock mode. See Encoding the AD6640 section.

5, 6, 13, 14, 17, 18, 21,

22, 24, 34, 35, 38, 39

GND

Ground.

7

AIN

Analog Input.

8

AIN

Complement of Analog Input.

Internal Voltage Reference. Nominally +2.4 V. Bypass to Ground with

0.1

µF + 0.01 µF microwave chip capacitor.

10

C1

Internal Bias Point. Bypass to ground with 0.01

µF capacitor.

11, 12, 15, 16, 19, 20

+5 V Power Supply (Analog).

23

NC

No Connect.

25

D0 (LSB)

Digital Output Bit (Least Significant Bit).

26–33

D1–D8

Digital Output Bits.

42, 43

D9–D10

Digital Output Bits.

44

Digital Output Bit (Most Significant Bit).

NOTE

PIN CONFIGURATION

3

4

5

6

7

1

2

10

11

8

9

40 39 38

41

42

43

44

36

35 34

37

29

30

31

32

33

27

28

25

26

23

24

12 13

14 15

16 17 18 19 20 21 22

PIN 1

TOP VIEW

(Not to Scale)

D8

D7

D6

D5

D4

D3

D2

AD6640

ENCODE

ENCODE

GND

GND

AIN

NC = NO CONNECT

C1

D1

D0 (LSB)

GND

NC

AIN