VSP1021

3V, 10BIT, 25MSPS, LOW POWER

AREA CCD ANALOG FRONT END

SLES016C− FEBRUARY 2002 − REVISED MARCH 2004

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

TYPE

DESCRIPTION

NAME

NUMBER

TYPE

DESCRIPTION

ADCCLK

16

I

ADC clock input

AVDD

24, 27, 33,

40

Analog-supply voltage, 3 V

AVSS

25, 26, 35,

41

Analog ground

BLKG

19

I

Control input. The CDS operation is disabled when BLKG is pulled low.

CLAMP

23

I

CCD signal clamp-control input

CLREF

28

O

Clamp reference-voltage output

CS

46

I

Chip select. A logic low on this input enables the VSP1021 serial port.

DACO1

34

O

Digital-to-analog converter output 1

DACO2

36

O

Digital-to-analog converter output 2

DIN−

29

I

Negative input signal from CCD

DIN+

30

I

Positive input signal from CCD

DIVDD

13

Digital-interface-circuit supply voltage, 1.8 V to 3.6 V

DIVSS

14

Digital-interface-circuit ground

DVSS

15

Digital ground

DVDD

17

Digital-supply voltage, 3 V

D0−D9

3−12

O

10-bit, 3-state ADC output data or offset DACs test data

NC

1, 2, 18

Not connected

OBCLP

20

I

Optical black-level and offset-calibration-control input, active low

OE

42

I

Output data enable, active low

PIN

31

I

Video-input signal

RBD

37

O

Internal bandgap reference for external decoupling

RESET

43

I

Hardware reset input, active low. This signal forces a reset of all internal registers.

RMD

39

O

Ref− output for external decoupling

RPD

38

O

Ref+ output for external decoupling

SCKP

45

I

This terminal selects the polarity of SCLK.

0 = SCLK stays high during idle period. The serial data is latched at the rising edge of SCLK.

1 = SCLK stays low during idle period. The serial data is latched at the falling edge of SCLK.

SCLK

48

I

Serial clock input. This clock synchronizes the serial-data transfer.

SDIN

47

I

Serial data input to configure the internal registers

SR

21

I

CCD reference-level sample-clock input

STBY

44

I

Hardware power-down control input, active low

SV

22

I

CCD signal-level sample-clock input

VSS

32

Analog ground