Rohm LSH1208-BA50A Color contact image sensor heads for high-speed scanner Datasheet

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)
236 ±0.5
2-φ1.5×2
Oval Hole D4MIN
216 (Effective Reading Width)
Effective 1st bit
9.4
0.324±0.1
17.5
14 ±0.2
Scanning Line
2-φ1.5 D4MIN
15
2- 3 +0/-0.1
2.0±0.8
MAX.3.15
6.9
1mm Pitch 15pin
max.1
max.1
max.1
max.1
6.9
No.15
No.1
Center of FCC
13.8
Characteristics
Parameter
Symbol
Typ.
Unit
Effective scanning width
−
216
mm
Primary scan dot density
−
1200
dpi
Total dot number
−
10368
dots
Power supply voltage
VDD
3.3
V
Reference voltage
VREF
0.8
V
Scanning speed
SLT
1.0 x 3
ms / line
CLK
4
MHz
Maximum dynamic range
VRMax
0.5
V
Minimum dynamic range
VRMin.
0.25
V
Vod
VREF +
− 0.1
V
−
5 to 45
°C
Clock frequency
Dark output
Operating temperature
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c 2011 ROHM Co., Ltd. All rights reserved.
○
1/5
2011.03 - Rev.B
LSH1208-BA50A
Data Sheet
Pin assignments
No.
Circuit
I/O
Function
1
AO3
O
Analog output
2
GND
I
Ground
3
AO2
O
Analog output
4
GND
I
Ground
5
AO1
O
Analog output
6
MODE
I
Mode select
7
GND
I
Ground
8
VDD
I
Power supply
9
VREF
I
Reference voltage
10
SP
I
Start pulse
11
CLK
I
Clock
12
V-LED
I
LED power supply
13
B-GND
I
BLUE LED ground
14
G-GND
I
GREEN LED ground
15
R-GND
I
RED LED ground
Timing chart
(a) CLK Timing Chart
1/fCLK
twH
twL
CLK
50%
50%
SP
tSETUP tHOLD
ts
Ao
1pixel
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2pixel
2011.03 - Rev.B
LSH1208-BA50A
Data Sheet
(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.
1200dpi mode
1
2
82
CLK
SP
A O1 to 3
VREF output period
A O1 :
A O2 :
A O3 :
1 to 82clock
1 to 82clock
1 to 82clock
Vdummy
Analog output period
1 to 100pixels
−
−
101 to 3456pixels
3457 to 6912pixels
6913 to 10312pixels
Vdummy
−
−
10313 to 10368pixels
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.
600dpi mode
1
2
82
CLK
SP
A O1 to 3
VREF output period
A O1 :
A O2 :
A O3 :
1 to 82clock
1 to 82clock
1 to 82clock
Vdummy
Analog output period
Vdummy
1 to 50pixels
−
−
51 to 1728pixels
1729 to 3456pixels
3457 to 5156pixels
−
−
5157 to 5184pixels
Note)The CLK section area which is over the effective pixel numbers
(Output blank part) cannot be used as the analog Output
standard level.
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c 2011 ROHM Co., Ltd. All rights reserved.
○
3/5
2011.03 - Rev.B
LSH1208-BA50A
Data Sheet
(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.
300dpi mode
1
2
82
CLK
SP
A O1 to 3
VREF output period
1 to 82clock
1 to 82clock
1 to 82clock
A O1 :
A O2 :
A O3 :
Vdummy
Analog output period
Vdummy
1 to 25pixels
−
−
26 to 864pixels
865 to 1728pixels
1729 to 2578pixels
−
−
2579 to 2592pixels
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
VDD
1μF×6
GND
1
10368
VDD
SP
VREF
ANALOG MEMORY CIRCUIT
CLK
MODE
1
3456
3457
6912
6913
10368
AO1
AO2
AO3
MODE
VREF
VLED
RGND
GGND
BGND
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c 2011 ROHM Co., Ltd. All rights reserved.
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4/5
2011.03 - Rev.B
LSH1208-BA50A
Data Sheet
Peripheral circuit
SENSOR UNIT
13
14
15
12
1
3
5
9
8
10
11
R3
2, 4, 7
6
GND
MODE
C5
R3
R1
R2
B
G
R
R3
C1
A 3
C3
A 2
A 1
SP
VDD
CLK
C2
LED GND
C4
VREF
VLED
R1=R2=100Ω, R3=100KΩ
C1=C2=47μF
C3=100μF, C4=0.1μF, C5=100pF
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c 2011 ROHM Co., Ltd. All rights reserved.
○
5/5
2011.03 - Rev.B
Notice
Notes
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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© 2011 ROHM Co., Ltd. All rights reserved.
R1120A
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