AD9840A

–6–

REV. 0

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)

AUX1IN

AVSS

AUX2IN

AVDD2

BYP4

NC

CCDIN

DRVSS

DRVSS

(LSB) D0

D1

D2

NC = NO CONNECT

D3

D4

D5

D6

BYP2

BYP1

AVDD1

AVSS

AD9840A

D7

AVSS

D8

(MSB) D9

PIN FUNCTION DESCRIPTIONS

Pin Number

Name

Type

Description

1, 2

DRVSS

P

Digital Driver Ground

3–12

D0–D9

DO

Digital Data Outputs

13

DRVDD

P

Digital Output Driver Supply

14

DRVSS

P

Digital Output Driver Ground

15, 18, 24, 41

DVSS

P

Digital Ground

16

DATACLK

DI

Digital Data Output Latch Clock

17

DVDD1

P

Digital Supply

19

PBLK

DI

Preblanking Clock Input

20

CLPOB

DI

Black Level Clamp Clock Input

21

SHP

DI

CDS Sampling Clock for CCD’s Reference Level

22

SHD

DI

CDS Sampling Clock for CCD’s Data Level

23

CLPDM

DI

Input Clamp Clock Input

25, 26, 35

AVSS

P

Analog Ground

27

AVDD1

P

Analog Supply

28

BYP1

AO

Internal Bias Level. Decoupling

29

BYP2

AO

Internal Bias Level Decoupling

30

CCDIN

AI

Analog Input for CCD Signal

31

NC

NC

Leave Floating or Decouple to Ground with 0.1

F

32

BYP4

AO

Internal Bias Level Decoupling

33

AVDD2

P

Analog Supply

34

AUX2IN

AI

Analog Input

36

AUX1IN

AI

Analog Input

37

CML

AO

Internal Bias Level Decoupling

38

VRT

AO

A/D Converter Top Reference Voltage Decoupling

39

VRB

AO

A/D Converter Bottom Reference Voltage Decoupling

40

DVDD2

P

Digital Supply

42

THREE-STATE

DI

Digital Output Disable. Active High

43

NC

NC

May be tied High or Low. Should not be left floating.

44

STBY

DI

Standby Mode, Active High. Same as Serial Interface Standby Mode

45

NC

NC

Internally Not Connected. May be tied high or low

46

SL

DI

Serial Digital Interface Load Pulse

47

SDATA

DI

Serial Digital Interface Data

48

SCK

DI

Serial Digital Interface Clock

TYPE: AI = Analog Input, AO = Analog Output, DI = Digital Input, DO = Digital Output, P = Power.