74125C.PDF

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

INTRODUCTION

The KC74125C is an interline transfer CCD area image

sensor developed for NTSC 1/4 inch optical format video

cameras, surveillance cameras, object detectors and image

pattern recognizers. High sensitivity is achieved through the

adoption of Ye, Cy, Mg and G complementary color mosaic

filters, on-chip micro lenses and HAD (Hole Accumulated

Diode) photosensors. This chip features a field integration

read out system and an electronic shutter with variable charge

storage time.

FEATURES

•

High Sensitivity

•

Optical Size 1/4 inch Format

•

No adjust Substrate Bias

•

Ye, Cy, Mg, G On-chip Complementary Color Mosaic Filter

•

Variable Speed Electronic Shutter

(1/60, 1/100 ~ 1/10,000sec)

•

Low Dark Current

•

Horizontal Register 3.3 to 5.0V Drive

•

14pin Ceramic DIP Package

•

Field Integration Read Out System

•

No DC Bias on Reset Gate

STRUCTURE

•

Number of Total Pixels:

537(H)

505(V)

•

Number of Effective Pixels:

510(H)

492(V)

•

Chip Size:

4.83mm(H)

4.04mm(V)

•

Unit Pixel Size:

7.15

m(H)

5.55

m(V)

•

Optical Blacks & Dummies:

Refer to Figure Below

Vertical 1 Line (Even Field Only)

14Pin Cer DIP

ORDERING INFORMATION

Device

Package

Operating

KC74125C

14Pin Cer DIP

-10

C ~ +60

16 2

510

-C

OUTPUT

Dummy Pixels

Optical Black Pixels

Effective Pixels

Effective

Imaging

Area

H-CCD

1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

KC74125C

BLOCK DIAGRAM

PIN DESCRIPTION

Figure 1. Block Diagram

Table 1. Pin Description

Pin

Symbol

Description

Pin

Symbol

Description

Vertical register transfer clock

Signal output

Vertical register transfer clock

GND

Vertical register transfer clock

SUB

Substrate clock

Vertical register transfer clock

Protection transistor bias

No connection

Reset gate clock

GND

Ground

Horizontal register transfer clock

OUT

Signal output

Horizontal register transfer clock

OUT

GND

SUB

rti

ift

r C

rti

ift

r C

rti

ift

r C

rti

ift

r C

Horizontal Shift Register CCD

(Top View)

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

ABSOLUTE MAXIMUM RATINGS

(NOTE)

NOTE: The device can be destroyed, if the applied voltage or temperature is higher than the absolute maximum rating voltage

or temperature.

Table 2. Absolute Maximum Ratings

Characteristics

Symbols

Min.

Max.

Unit

Substrate voltage

SUB - GND

-0.3

, V

OUT

- SUB

-40

Vertical clock input voltage

, - GND

-0.3

- GND

-0.3

, - V

-0.3

- V

-0.3

- SUB

-40

Horizontal clock input voltage

- V

-0.3

- SUB

-30

Voltage difference between vertical and

horizontal clock input pins

-17

Output clock input voltage

- GND

-0.3

- SUB

-40

Protection circuit bias voltage

- SUB

-40

Operating temperature

-10

Storage temperature

STG

-30

1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

KC74125C

DC CHARACTERISTICS

CLOCK VOLTAGE CONDITIONS

Table 3. DC Characteristics

Item

Symbol

Min.

Typ.

Max.

Unit

Output stage drain bias

14.55

15.0

15.45

Protection circuit bias voltage

The lowest vertical clock level

Output stage drain current

Table 4. Clock Voltage Conditions

Item

Symbol

Min.

Typ.

Max.

Unit

Remark

Read-out clock voltage

VH1

, V

VH3

14.55

15.0

15.45

High level

Vertical transfer clock voltage

VM1

~ V

VM4

-0.2

0.0

0.2

Middle

VL1

~ V

VL4

-8.0

-7.5

-7.0

Low

Horizontal transfer clock voltage

HH1

, V

HH2

3.0

5.0

5.25

High

HL1

, V

HL2

-0.05

0.0

0.05

Low

Charge reset clock voltage

RGH

4.75

5.0

5.25

High

RGL

-0.2

0.0

0.2

Low

Substrate clock voltage

SUB

21.5

22.5

23.5

Shutter

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

DRIVE CLOCK WAVEFORM CONDITIONS

Read Out Clock Waveform

Vertical Transfer Clock Waveform

100%

90%

10%

VH 1,

VH3

twh

V H 1

V H H

VL L

VL 1

VL H

V H L

V H H

¥Õ V 1

VHL

VH H

V HH

VHL

VH 4

VL H

VL L

V L 4

¥Õ V 4

VH H

VHH

VHL

VH2

VL L

VL H

VL 2

¥Õ V 2

VL 3

VHH

V HL

VH L

VH3

VH H

VL H

VL L

¥Õ V 3

V H

= ( V

V H 1

+ V

V H 2

)/ 2

V L

= (V

V L 3

+ V

V L 4

)/ 2

¥Õ

= V

V H n

- V

V L n

(n =1~4)

V H H

= V

V H

+ 0 . 3 V

V H L

= V

V H

- 0 . 3 V

V L H

= V

V L

+ 0 . 3 V

V L L

= V

V L

- 0 . 3 V

1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

KC74125C

Horizontal Transfer Clock Waveform Diagram

Reset Gate Clock Waveform Diagram

RGLH

is the maximum value and V

RGLL

the minimum value of the coupling waveform in the period from Point A in

the diagram about to R

rise

RGL

= (V

RGLH

+ V

RGLL

)/2, V

FRG

= V

RGH

- V

RGL

Substrate Clock Waveform

90%

10%

twh

twl

¥Õ

H L

R GL

+ 0.5V

twl

Point

twh

R GH

R GL

RG waveform

R GLH

R GLL

¥Õ

H1 waveform

10%

¥Õ

R G

100%

90%

10%

twh

¥Õ

SU B

S U B

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

CLOCK EQUIVALENT CIRCUIT CONSTANT

Table 5. Clock Equivalent Circuit Constant

Item

Symbol

twh

twl

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Read-out clock

2.5

0.5

Vertical clock

250

Horizontal clock

6.5

9.5

6.5

9.5

6.5

9.5

6.5

9.5

Reset clock

6.5

4.5

Substrate clock

SUB

1.5

2.0

0.5

1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

KC74125C

EQUIVALENT CIRCUIT PARAMETERS

Table 6. Equivalent Circuit Parameters

Item

Symbol

Typ.

Unit

Remark

Capacitance between vertical transfer clock and GND

, C

680

, C

820

Capacitance between vertical transfer clocks

V12

, C

V34

180

V23

, C

V41

180

V13

V24

Capacitance between horizontal transfer clock and GND

, C

Capacitance between horizontal transfer clocks

H12

Capacitance between substrate clock and GND

SUB

180

Vertical transfer clock serial resistor

~ R

Ω

Vertical transfer clock ground resistor

VGND

Ω

Horizontal transfer clock serial resistor

, R

Ω

Reset gate clock serial resistor

100

Ω

¥Õ

H12

¥Õ

V23

¥Õ

V41

¥Õ

V12

¥Õ

V34

¥Õ

VGND

¥Õ

V24

¥Õ

V13

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

OPERATING CHARACTERISTICS

Device Temperature = 25

NOTE: Test Temperature = 60

TESTING SYSTEM

Table 7. Operating Characteristics

Item

Symbol

Min.

Typ.

Max.

Unit

Remark

Sensitivity

mV/lux

Saturation signal

SAT

800

Smear

0.007

0.01

Blooming margin

1,000

times

Uniformity

Dark signal

(NOTE)

Dark shading

(NOTE)

∆

Image lag

LAG

0.5

Flicker Y

Flicker red, blue

, F

Color uniformity

, D

Line stripe W, R, G, B

, L

Figure 2. Testing System

CCD

AMP

LPF1

S/H

LPF2

(3dB down at 4MHz)

Chroma

Signal

Output

Illuminance

Signal

Output

CCD Signal

Output

C. D. S

(3dB down at 1MHz)

1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

KC74125C

TEST CONDITION

1. Use a light source with color temperature of 3,200K hallogen lamp and CM-500S for IR cut filter.

The light source is adjusted in accordance with the average value of Y signals indicated in each item.

COLOR FILTER ARRAY

The color filter array of this image sensor is shown in the right figure. this complementary mosaic CFA is used with

the operation of field integration mode, where all of the photosensors are read out during each video field. The

signals from two vertically-adjacent photosensor lines, such as line couple A1 or A2 for field A are summed when

the signal charges are transferred into the vertical transfer CCD column. The read out line pairing is shifted down

by one line for field B.

The sensor output signals through the horizontal register (H-CCD) at line A1 are [G+Cy], [MG+Ye], [G+CY],

[Mg+Ye]. These signals are processed in order to compose Y and C signals. By adding the two adjacent signals at

line A1, Y signal is formed as follows

C signal is composed by substracting the two adjacent signals at line A1

Figure 3. Color Filter Array

--- G

(

)

(

)

[

]

--- 2B

(

)

H - CCD

KC74125C 1/4 INCH CCD IMAGE SENSOR FOR NTSC CAMERA

Next, the signals through H-CCD at line A2 are [Mg+Cy], [G+Ye], [Mg+Cy], [G+Ye]. Simmilary, Y and C signals are

composed at line A2 as follows

Accordingly, Y signal is balanced in relation to scanning lines, and C signal takes the form of R-Y and -(B-Y) on

alternate lines.

It i