NEC UPD3798CY Datasheet

DATA SHEET

MOS INTEGRATED CIRCUIT

µ

PD3798

5348 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

The µPD3798 is a color CCD (Charge Coupled Device) linear image sensor which changes optical images to

electrical signal and has the function of color separation.

µ

PD3798 has 3 rows of 5348 pixels, and each row has a single-sided readout type of charge transfer register.

The
And it has reset feed-through level clamp circuits and voltage amplifiers. Therefore, it is suitable for 600 dpi/A4 color
image scanners, color facsimiles and so on.

FEATURES

• Valid photocell : 5348 pixels × 3

• Photocell's pitch : 7 µm

• Line spacing : 28 µm (4 lines) Red line-Green line, Green line-Blue line

7

• Color filter : Primary colors (red, green and blue), pigment filter (with light resistance 10

• Resolution : 24 dot/mm A4 (210 × 297 mm) size (shorter side)

600 dpi US letter (8.5” × 11”) size (shorter side)

• Drive clock level : CMOS output under 5 V operation

• Data rate : 5 MHz MAX.

• Power supply : +12 V

• On-chip circuits : Reset feed-through level clamp circuits

Voltage amplifiers

lx•hour)

ORDERING INFORMATION

Part Number Package

µ

PD3798CY CCD linear image sensor 32-pin plastic DIP (400 mil)

The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.

Document No. S14314EJ1V0DS00 (1st edition)
Date published June 1999 N CP(K)
Printed in Japan

©

1999

BLOCK DIAGRAM

30

GND GNDVOD

2 11

φ

2

25 24

µ

PD3798

φ

1

V

OUT1

(Blue)

V

OUT2

(Green)

VOUT3
(Red)

31

32

······

D14

······

D14

······

D14

1

3

φ

RB

φ

4

CLB

D31

CCD analog shift register

D31

CCD analog shift register

D31

CCD analog shift register

Photocell

S1

S2

(Blue)

Transfer gate

Photocell

S1

S2

(Green)

Transfer gate

Photocell

S1

S2

(Red)

Transfer gate

S5347

S5348

S5347

S5348

S5347

S5348

D32

D32

D32

D33

D33

D33

D34

D34

D34

φ

TG1

23

(Blue)

φ

TG2

22

(Green)

φ

TG3

10

(Red)

98

φ

φ

2

1

2

DATA SHEET S14314EJ1V0DS00

PIN CONFIGURATION (Top View)

CCD linear image sensor 32-pin plastic DIP (400 mil)

•µPD3798CY

OUT

3

Output signal 3 (Red)

V

1

32

µ

PD3798

V

OUT

2

Output signal 2 (Green)

Ground

Reset gate clock

Reset feed-through level
clamp clock

No connection

Internal connection

Internal connection

Shift register clock 2

Shift register clock 1

Transfer gate clock 3
(for Red)

Ground

GND

φ

φ

CLB

φ

TG3

GND

RB

NC

IC

IC

φ

φ

2

1

1

1

3

4

5

6

7

8

2

9

1

10

11

Red

Green

Blue

31

30

29

28

27

26

25

24

23

22

V

V

NC

NC

IC

IC

φ

φ

φ

φ

OUT

OD

2

1

TG1

TG2

1

Output signal 1 (Blue)

Output drain voltage

No connection

No connection

Internal connection

Internal connection

Shift register clock 2

Shift register clock 1

Transfer gate clock 1
(for Blue)

Transfer gate clock 2
(for Green)

12

Internal connection

Internal connection

No connection

No connection

No connection

IC

IC

NC

NC

NC

13

14

15

16

5348

5348

5348

Caution Leave pins 6, 7, 12, 13, 20, 21, 26, 27 (IC) unconnected.

DATA SHEET S14314EJ1V0DS00

IC

21

IC

20

NC

19

NC

18

17

NC No connection

Internal connection

Internal connection

No connection

No connection

3

µ

PD3798

PHOTOCELL STRUCTURE DIAGRAM PHOTOCELL ARRAY STRUCTURE DIAGRAM

(Line spacing)

7 m

4 m

µ

Aluminum
shield

µ

7 m

3

m

µ

Channel stopper

µ

7 m

µ

7 m

µ

Blue photocell array

Green photocell array

Red photocell array

4 lines

(28 m)

µ

4 lines

(28 m)

µ

4

DATA SHEET S14314EJ1V0DS00

µ

PD3798

ABSOLUTE MAXIMUM RATINGS (TA = +25 °C)

Parameter Symbol Ratings Unit
Output drain voltage VOD –0.3 to +15 V
Shift register clock voltage V
Reset gate clock voltage V
Reset feed-through level clamp clock voltage V
Transfer gate clock voltage V

φ

1, Vφ2 –0.3 to +8 V

φ

RB –0.3 to +8 V

φ

CLB –0.3 to +8 V

φ

TG1

to V

φ

TG3 –0.3 to +8 V

Operating ambient temperature TA –25 to +60 °C
Storage temperature Tstg –40 to +70 °C

Caution Exposure to ABSOLUTE MAXIMUM RATINGS for extended periods may affect device reliability;

exceeding the ratings could cause permanent damage. The parameters apply independently.

RECOMMENDED OPERATING CONDITIONS (TA = +25 °C)

Parameter Symbol MIN. TYP. MAX. Unit
Output drain voltage VOD 11.4 12.0 12.6 V
Shift register clock high level V
Shift register clock low level V
Reset gate clock high level V
Reset gate clock low level V
Reset feed-through level clamp clock high level V
Reset feed-through level clamp clock low level V
Transfer gate clock high level V
Transfer gate clock low level V
Data rate f

φ

1H, Vφ2H 4.5 5.0 5.5 V

φ

1L, Vφ2L –0.3 0 +0.5 V

φ

RBH 4.5 5.0 5.5 V

φ

RBL –0.3 0 +0.5 V

φ

CLBH 4.5 5.0 5.5 V

φ

CLBL –0.3 0 +0.5 V

φ

TG1H

to V

φ

TG3H 4.5 V

φ

TG1L

to V

φ

TG3L –0.3 0 +0.5 V

φ

RB – 1.0 5.0 MHz

Note

φ

1H

Note

V

φ

1H

V

Note When Transfer gate clock high level (V

Image lag can increase.

DATA SHEET S14314EJ1V0DS00

φ

TG1H to VφTG3H) is higher than Shift register clock high level (Vφ1H),

5

ELECTRICAL CHARACTERISTICS

µ

PD3798

TA = +25 °C, VOD = 12 V, data rate (f

φ

RB) = 1 MHz, storage time = 5.5 ms, input signal clock = 5 Vp-p

light source: 3200 K halogen lamp +C-500S (infrared cut filter, t = 1mm) + HA-50 (heat absorbing filter, t = 3 mm)

Parameter Symbol Test Conditions MIN. TYP. MAX. Unit
Saturation voltage Vsat 2.0 2.5 – V
Saturation exposure Red SER 0.223 lx•s

Green SEG 0.245 lx•s

Blue SEB 0.409 lx•s
Photo response non-uniformity PRNU VOUT = 1.0 V 6 20 %
Average dark signal ADS Light shielding 0.2 2.0 mV
Dark signal non-uniformity DSNU Light shielding 1.5 3.0 mV
Power consumption PW 360 540 mW
Output impedance ZO 0.5 1 kΩ
Response Red RR 7.8 11.2 14.6 V/lx•s

Green RG 7.1 10.2 13.3 V/lx•s

Blue RB 4.2 6.1 8.0 V/lx•s
Image lag IL VOUT = 1.0 V 1.5 7.0 %
Offset level
Output fall delay time
Total transfer efficiency TTE VOUT = 1.0 V, 92 98 %

Response peak Red 630 nm

Dynamic range DR1 Vsat /DSNU 1666 times

Reset feed-through noise
Random noise σ Light shielding – 1.0 – mV

Note1

VOS 4.0 5.5 7.0 V

Note2

Green 540 nm

Blue 460 nm

Note1

td VOUT = 1.0 V 40 ns

data rate = 5 MHz

DR2 Vsat /σ 2500 times
RFTN Light shielding –1000 –300 +500 mV

Notes 1. Refer to TIMING CHART 2.

2. When the fall time of

6

φ

1 (t1) is the TYP. value (refer to TIMING CHART 2).

DATA SHEET S14314EJ1V0DS00