Datasheet LSH1208-BA50A Datasheet (ROHM)

Color Contact Image Sensor Heads for High-speed Scanner

LSH1208-BA50A

Contact Image Sensor Heads with 3 times higher scanning speed due to 3ch outputs. Newly developed resolution change-over IC is employed which has improved noise resistance.

Applications

High speed reading equipment (i.e. document scanners, wide format scanners).

Features

1) High speed reading capability due to 3 analog output.

2) Signal amplifier is built into the sensor IC in order to increase immunity to external noise.

3) ROHM’s newly developed sensor IC reduces failures due to ESD (based on the IEC61000-4-2 standard).

4) With the proprietary prism, the output signal is maintained uniformly.

5) The ceramic substrate is used for excellent dimensional accuracy and thermal stability.

Dimensions (Unit : mm)

2-φ1.5

×

2

Oval Hole D4MIN

Scanning Line

±0.2

14

2-φ1.5 D4MIN

6.9

Characteristics

Parameter Effective scanning width Primary scan dot density Total dot number Power supply voltage Reference voltage Scanning speed Clock frequency Maximum dynamic range Minimum dynamic range Dark output Operating temperature

max.1

±0.5

236

(Effective Reading Width)

216

max.1

Symbol Typ. Unit

−

V

DD

REF

V SLT

CLK VRMax VRMin.

Vod

−

216

1200

10368

3.3

0.8

1.0 x 3

0.5

0.25

V

REF

5 to 45

4

+

0.1

−

mm

dpi

dots

V V

ms / line

MHz

V V V

°C

max.1

Effective 1st bit

2.0±0.8

No.1

Center of FCC

9.4

0.324±0.1

17.5

15

No.15

13.8

2- 3 +0/-0.1

MAX.3.15

15pinPitch1mm

6.9

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d

C

S

A

Pin assignments

No. Circuit I / O Function

1 2 3 4 5 6 7 8

9 10 11 12

13 14

15

Timing chart

(a) CLK Timing Chart

O3

A

GND I

O2

A

GND

A

O1

MODE

GND I

V

DD

V

REF

SP

CLK

V-LED B-GND G-GND R-GND

O

Analog output Ground

O

Analog output

I

Ground

O

Analog output

I

Mode select Ground

I

Power supply

I

Reference voltage

I

Start pulse

I

Clock LED power supply

I

BLUE LED ground

I

GREEN LED groun

I

RED LED ground

I

Data Sheet LSH1208-BA50A

1/fCLK

twH

twL

LK

50% 50%

P

tHOLDtSETUP

ts

o

1pixel 2pixel

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C

S A

ls

1200dpi mode

C

S A

600dpi mode

ls

(b-1) Data Output Timing Chart (1200dpi mode) After turning on the SP pulse, the analog output starts from the setting up point of 82 clock pulse.

Data Sheet LSH1208-BA50A

1

282

LK

P

O1 to 3

REF

output period Vdummy VdummyAnalog output period

V

A

O1 :

A

O2 :

A

O3 :

Note)The CLK section area which is over the effective pixel numbers (Output blank part) cannot be used as the analog Output standard level.

(b-2) Data Output Timing Chart (600dpi mode) After turning on the SP pulse, the analog output starts from the setting up point of 82 clock pulse.

1 to 82clock 1 to 100pixels 101 to 3456pixels 1 to 82clock − 3457 to 6912pixels 1 to 82clock − 6913 to 10312pixels

−

10313 to 10368pixe

1

282

LK

P

O1 to 3

REF

output period Vdummy VdummyAnalog output period

V

A

O1 :

A

O2 :

A

O3 :

Note)The CLK section area which is over the effective pixel numbers (Output blank part) cannot be used as the analog Output standard level.

1 to 82clock 1 to 82clock 1 to 82clock

1 to 50pixels 51 to 1728pixels

− 1729 to 3456pixels

− 3457 to 5156pixels

−

5157 to 5184pixe

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C

S A

ls

300dpi mode

V G

S C

A A A

V

M

R G B

(b-3) Data Output Timing Chart (300dpi mode) After turning on the SP pulse, the analog output starts from the setting up point of 82 clock pulse.

Data Sheet LSH1208-BA50A

1

282

LK

P

O1 to 3

V

REF output period Vdummy VdummyAnalog output period

AO1 : AO2 : AO3 :

Note)The CLK section area which is over the effective pixel numbers (Output blank part) cannot be used as the analog Output standard level.

Circuit diagram

DD

ND

1μF×6

1 to 82clock 1 to 25pixels 26 to 864pixels 1 to 82clock − 865 to 1728pixels 1 to 82clock − 1729 to 2578pixels

−

2579 to 2592pixe

103681

P LK

O1 O2 O3

ODE

REF

LED

GND

V

DD

V

ANALOG MEMORY CIRCUIT

1

3456 3457 6912 6913 10368

REF

MODE

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Peripheral circuit

15 12 1 3 5 9 8 10 11 2, 4, 7 61413

Data Sheet LSH1208-BA50A

SENSOR UNIT

B

LED GND

R3

RG

C3

C4

LED

V

R3

C1

A 2A 3

A 1

VREF

DD

V

C2

R2

C5

R1

CLKSP

MODEGND

R1=R2=100Ω, R3=100KΩ C1=C2=47μF C3=100μF, C4=0.1μF, C5=100pF

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Notes

Notice

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R1120A