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IMAGE SENSORS
OPA256C1
electronic components
OPA256C1
Self-Scanning Line Sensor
GENERAL DESCRIPTION
The OPA256C-1 is a 256-bit, one-dimensional diode array comprised of PN junction photodetector
diodes and CCDs (charge coupled devices). By using a two-phase clock pulse, transfer pulse,
and reset pulse, the OPA256C-1 can measure incident light.
FEATURES
CCD for high sensitivity
CCD transfer efficiency greater than 99.995%
Photodetector configured of PN junction photodetector diodes for good blue sensitivity and
good output uniformity.
Photodiodes highly integrated with 13
m pitch for high resolution
High-speed scanning
Low-voltage operation
Internal output amplifier and compensating amplifier
APPLICATIONS
Industrial control
Pattern recognition
Control devices
Object detection
PIN CONFIGURATION
Dimensions
(Unit: mm)
E2P0059-37-X2
22.860.3
18 17
16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0.4
9.80.6
7.360.2
2.40.2
7.62
0.25
1.10.2
5.0min.
0.46
2.54
20.320.25
0.51min.
2.50.35
1st Bit
* : Indicates photodetector
location
*
*
*
This version: Jan. 1998
Previous version: May. 1997
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IMAGE SENSORS
OPA256C1
Pin Connection Block Diagram
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CS
OS
0D
f2B
f1B
fT
TP
1
TP
2
PG
BCCD analog shift register
1 2
Transfer gate
RD
fR
OG
f2A
f1A
fT
TP
3
TP
4
V
SS
SS
Compensating
preamplifier
Preamplifier
Output gate
Photo-gate
Photodiodes F255 256
Photo-gate
Transfer gate
BCCD analog shift register
Symbol
RD
fR
OG
f1A
f1B
f2A
f2B
fT
TP
1
TP
2
TP
3
TP
4
V
SS
PG
OD
OS
CS
Name
Reset transistor drain
Reset transistor gate clock
Output gate
CCD register clock
CCD register clock
CCD register clock
CCD register clock
Phototransfer gate clock
Test pin (electrical input gate)
Test pin (electrical input diode)
Test pin (electrical input gate)
Test pin (electrical input diode)
Substrate bias
Photo-gate
Output transistor drain
Output transistor source (video output)
Compensating transistor source (noise output)
Name
Symbol
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IMAGE SENSORS
OPA256C1
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Parameter
Max.
Min.
Storage Temperature
C
+125
40
T
stg
C
+85
20
T
op
V
+18
0.3
V
f
V
+18
0.3
V
DD
Symbol
Unit
Operating Temperature
Clock Voltage
Applied Voltage
Test Condition
,--
--
Ta=25C
Parameter
Unit
(Ambient Temperature Ta=25C)
V
Max.
12.6
Typ.
12
Min.
11.4
Symbol
V
OD
V
12.6
12
11.4
V
RD
V
DD
V
5.25
5
4.75
V
OG
V
5.25
5
4.75
V
PG
V
2.5
2.0
1.5
V
SS
V
12.6
12
11.4
V
IS
Electrical Input Gate Voltage (TP
1, 3
)
V
0.2
0
0.1
V
IG
"H"
V
V
DD
V
DD
7
V
f H
CCD register
V
0.8
0.4
0
V
V
DD
V
DD
7
V
0.8
0.4
0
V
fTL
V
V
DD
V
DD
7
V
fRH
V
0.8
0.4
0
V
fRL
MH
Z
4
--
0.1
f
V
CCD register
pF
--
80
--
pF
--
10
--
pF
--
4
--
mW
--
80
--
P
D
k
W
--
1
--
R
L
"L"
"H"
"L"
"H"
"L"
1, 2
AB
V
f L
1, 2
AB
V
f
1, 2
AB
C
f
1, 2
AB
C
f
T
C
f
R
Reset Drain Voltage
Output Transistor Drain Voltage
Output Gate Voltage
Photo Gate Voltage
Substrate Bias
Electrical Input Diode Voltage (TP
2, 4
)
Clock Pulse Voltage
Photo-transfer
Reset
Video Frequency
Clock Input
Capacitance
Photo-transfer
Reset
Power Dissipation
Output Load Resistance
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IMAGE SENSORS
OPA256C1
POTOELECTRIC CHARACTERISTICS
PIXEL CONFIGURATION
Pixcel Configration Diagram
,
,
,
Q
Q
Q
,
,
,
Q
Q
Q
,,
,,
,,
QQ
QQ
QQ
,,
,,
,,
QQ
QQ
,
,
Q
Q
,
,
Q
Q
,
,
Q
Q
D
W
P
L
Light shield layer
(Al)
Photodiode D
Parameter
Note
(Ambient Temperature Ta=25C)
Sensitivity
*1
*2
*3
--
*1
*2
*3
*4
2856K tungsten lamp
V
RD
, V
DD
=12 V, V
SS
=2.0 V, R
L
=1 k
W
When it is 50 percent of the saturation output (2856K tungsten lamp.)
However, this excludes the 1st, 2nd, and 256th bits
Storage time is assumed to be 10 ms.
Unit
mV/Rx sec
mV
%
V
*4
Max.
--
--
7
--
4
Typ.
1500
250
--
4.0
--
Min.
--
180
--
--
--
Symbol
R
W
Vsat
U
Vdc
Vd
mV
Saturation Output Voltage
Output Uniformity <*007*> (Overall)
Output DC Level
Dark Output Voltage
Parameter
Unit
(Ambient Temperature Ta=25C)
Arrangement
--
--
mm
mm
mm
Accuracy
---
--
2.0
2.0
2.5
Central Value
Straight line
256
13
8
18
Symbol
--
--
P
D
W
mm
3.0
3328
L
* See output timing for information concerning dummy pixels.
Number of Pixels
Pixels Pitch
Photodiode Width
Aperture Width
Sensor Length
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IMAGE SENSORS
OPA256C1
CLOCK INPUT TIMING CHARACTERISTICS
Parameter
Note
(Ambient Temperature Ta=25C)
*1
*2
*3
Unit
Max.
Typ.
Min.
Symbol
Rise time
ns
100
30
--
t
r
f
Register
ns
100
20
--
t
f
f
ns
100
20
0
t
O
f1, 2
ns
100
20
--
t
B
f1, 2
ns
100
30
--
t
r
fT
ns
100
20
--
t
f
fT
*4
Phototransfer
ms
15
10
5
t
W
fr
ms
10
1
0
t
S
fT
ms
10
1
0
t
H
fT
ns
100
30
--
t
r
fR
ns
100
20
--
t
r
fR
*5
Reset
ns
2000
--
80
t
W
fR
ns
2000
--
170
t
S
fR
ns
2000
--
0
t
H
fR
Fall time
Overlap time
Blank time
Rise time
Fall time
Transfer time duration
Setup time
Hold time
Rise time
Fall time
Duration
Setup time
Hold time
OPA256C1 Input Timing Diagrams
tr
f
*1
90%
100%
tf
f
f1 or f2
AB
AB
f2 or f1
AB
AB
*2
fA2 or fB1
fA1 or fB2
to
f1, 2
V
OG
1
2
Limited to periods during
fA1 rise and fA2 fall, and fB2 rise and fB1 fall.
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IMAGE SENSORS
OPA256C1
fA1 or fB2
fA2 or fB1
t
B
f1, 2
*3
1
2
V
OG
Limited to periods during
fA2 rise and fA1 fall, and fB1 rise and fB2 fall.
t
S
fT
t
W
fT
t
H
fT
10%
90%
50%
10%
fT
t
r
fT
t
f
fT
f1
AB
*4
90%
10%
90%
10%
90%
50%
10%
t
S
fR
t
W
fR
t
H
fR
t
r
fR
t
f
fR
fB2 or fA1
fA1 or fB2
*5
fR
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IMAGE SENSORS
OPA256C1
Input Timing Chart
Dummy output
DW dummy
OS
CS
t
T
t
H
AB
AB
t
S
fR
f1
f2
t
INT
S
1
S
2
D
1
D
2
D
3
S
255
S
256
VIDEO OUTPUT TIMING CHARACTERISTICS
Parameter
Note
(Ambient Temperature Ta=25C)
Video Rise Delay Time
--
--
--
--
Unit
ns
ns
ns
ns
Symbol
tdrv
trv
tdfv
tfv
V
DD
=V
RD
=V
f=12 V
V
DG
=V
PG
=5 V
Conditions
V
SS
=2 V
R
L
=1 k
W
C
L
=31 pF
Ta=25C
t
f
f=30 ns
t
r
f=35 ns
t
r
fR=15 ns
Max.
--
--
--
--
Guaranteed Values
Typ.
55
55
15
30
Min.
--
--
--
--
Video Rise Time
Video Fall Delay Time
Video Fall Time
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IMAGE SENSORS
OPA256C1
Output Timing Diagrams
tf
f=30 ns
tr
f=35 ns
f1A.f2B
90%
50%
10%
tr
f=R15 ns
90%
50%
10%
tdrv
tdfv
Video
trv
tfv
10%
90%
fR
TYPICAL CHARACTERISTICS
Iluminance vs. Output Characteristics
1000
100
10
1
1
10
100
1000
Tint=1 ms
2
5
2
5
20
50
200
500
20
50
200 500
f
fR=1 MHz
R
L
=1 k
W
2856K tungsten lamp
Room temperature
V
RD
=12 V
V
f1.2, fT, fR=12 V
V
OG
=5 V
V
PG
=5 V
V
SS
=2.0 V
Illuminance (Rx)
Output Voltage (mV)
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IMAGE SENSORS
OPA256C1
Dark vs. Temperature Characteristics
Spectral Sensitivity Characteristic
1.0
0.1
200
400
600
800
1000
1200
0.2
0.5
V
RD
=12 V
V
OG
=5 V
V
PG
=5 V
V
SS
=2.0 V
V
f
R
=12 V
Relative Output
Wavelength (nm)
100
10
1
0
20
40
60
80
100
Tint=25 ms
Tint=10 ms
Dark Current Output
Saturation Output
100(%)
10
30
50
70
90
2
5
20
50
200
500
1000
f
f
R
=1 MHz
V
RD
=12 V
f1, 2, fR, fT=12 V
V
OG
=5 V
V
PG
=5 V
V
SS
=2 V
R
L
=1 k
W
Ambient Temperature Ta (C)
M.T.F. Characteristics (White Fluorescent Lamp)
80
60
40
20
1
2
3
5
10
100
7.7(Line pair/mm)
Sensor bit
,
Max.
Min.
MTF=(Max.Min.) / (Max.+Min.)
Single pulse
(Black) input1
0
White
White
Continuous
input
M.T.F(%)
Relaitive Output
Black
Black
Black
100 (%)
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IMAGE SENSORS
OPA256C1
DRIVE CIRCUIT
+15V
+5V
+5V
5.1K
6.8
0.01
+5
+5V
5.1K
+5V
Digit
GND
Analog
GND
+5V
7404
15V
74123
74163
IB
IA
C CR
300P
2K
+5V
+5V
5.1K
RD1313
6.8
100
6.8
5K
2K
6.8
100
RD13BL
f
T
f
T
f
1A
f
1B
f
H
+5V
J K
f
R
Q
Q
+5V
J R
K
f
74107
DS0026CN
1S2075K
IK
1.5K
5.1K
6.8
0.01
6.8
500
RD78N
2K
300
IK
1K
300
5K
2SC372
OS
OPA256C-1
200
RD78N
6.8
200
RD13BL
10P
100K
0.01
5.1K
2SC169
m
A733
5.1K
680P
RD138L
200
1.8K
2.7K
m
PC159A
20K
22P
18K
100K
5.1K
2SC372
750
500
I
D
I
B
I
B
I
A
T
CL
f
L
CO
I
D
I
B
I
B
I
A
T
CL
f
L
CO
I
D
I
B
I
B
I
A
T
CL
f
L
CO
I
D
I
B
I
B
I
A
T
CL
f
L
CO
I
D
I
B
I
B
I
A
T
CL
f
L
CO
I
D
I
B
I
B
I
A
T
CL
f
L
CO
Q
Q
f
2A
f
2B
RD
OD
TP2
TP4
CS
+
I
m
+
I
m
+
+
0.01
0.01
0.01
6.8
0.01
0.01
V
SS
TP1.3
Q
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