Datasheet LSH2004-AA20A Datasheet (ROHM)

Contact Image Sensor Heads for narrow-width scanners

LSH2004-AA20A

Compatible with A6 size media, feature a dual-arch structure, allowing straight pass reading (both-directions). In addition, they
are compact, measuring only 119.5mm in length.

Applications

Check readers, card scanners, and a variety of other image input devices.

Features

1) Signal amplifier integrated into each sensor IC in order to eliminate external noise ; compatible with 3.3V interface.

2) LED light source mounted on the same substrate as the sensor chip itself, resulting in a more compact, lightweight package.

3) Proprietary prism maintains a uniform output signal.

4)

Ceramic substrate used, ensuring excellent dimensional and thermal stability.

Dimensions (Unit : mm)

5.5±0.3

Paper Feed Direction

(NOTE 1)

Deflection at the top of glass:0-0.25
Projection to platen is positive.

(NOTE 2)

Socket Housing:IL-Z-9S-S125C3(JAE)
Socket Contact:IL-Z-C3-A-15000(JAE)

119.5±0.3

109.6 (Effectiv Reading Width :104.6)

C

L

60±0.3 29.75±0.3

A

15.5±1
25±1

Max. 1.5

No.1 Pixel

No.9

3.96±0.5

(12.9)

(3.8)

Pin No. Signal

No.1
No.2
No.3
No.4
No.5
No.6

17.5±0.25

No.1

CLK
SP
VDD
GND
Ao
RLED

2.5

12.5±0.05

Max.2

Pin No. Signal

No.7
No.8
No.9

5±0.1

φ2±0.05

(Depth 1)

10.7±0.4

GLED
BLED
VLED

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2011.03 - Rev.B

Characteristics

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

Pin assignments

No.

Circuit
1
2
3
4
5
6
7
8IBLED

CLK

SP

V

DD

Ao

RLED

GLED

I / O

I
I
I
IGND

O

I
I

Functions
Clock
Start Pulse
Power Supply
Ground
Analog Output
LED ground
LED ground
LED ground

LED power supply9IVLED

Symbol Typ. Unit

−

−

−

DD

V
SLT
CLK

VRMax.

VRMin.

Vod

−

104.6
200
864

3.3

0.125×3
8

0.5

0.25

0.8±0.2
5 to 45

mm

dpi

dots

V

ms / line

MHz

V
V
V

°C

Data Sheet LSH2004-AA20A

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2011 ROHM Co., Ltd. All rights reserved.

2011.03 - Rev.B

1/fCLK

C

A

Note) Output blank part cannot be used as the analog output standard level.

Timing chart

(a) CLK Timing Chart

Data Sheet LSH2004-AA20A

twCLK twCLK

50%

LK

50% 50%

SP

o

50% 50% 50%

ts

tHOLDtSETUP

1pixel 2pixel

(b) Data Output Timing Chart

After turning on the SP pulse, the analog output shape starts from the setting up point of 65 clock pulse.

1 2 64 65 66

CLK

SP

Ao

V

REF

Output Period (64pixels) Analog Output Period

1 to 64 pixels 1 to 864pixels

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2011 ROHM Co., Ltd. All rights reserved.

2011.03 - Rev.B

G

B

G

R

Inner circuit

V

DD

1μF x 4

ND

Data Sheet LSH2004-AA20A

1

864

680Ω

1μF

SP

CLK

Ao

100kΩ

V

LED

GND

GND

GND

Peripheral circuit

87695 32

1μF

ANALOG MEMORY CIRCUIT

14

C2

DD

V

V

REF

220Ω

R1R2

GNDVLEDLED

BGR

C3

C4

GND

C1

V

DD

SP CLK

Ao

∗ R1=R2=100Ω
C1=47μF, C2=100pF
C3=100μF, C4=0.1μF

∗ Please adjust the value of resistance to fit your interface circuit.

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2011 ROHM Co., Ltd. All rights reserved.

2011.03 - Rev.B

Notes

Notice

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