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E2P0059-37-X2 IMAGE SENSORS
This version: Jan. 1998 Previous version: May. 1997 OPA256C-1
electronic components OPA256C-1
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
22.860.3 18 17 16 15 14 13 12 11 10
7.360.2
(Unit: mm)
* 0.4
1
2
3
4
5
6 1st Bit
7
8
9
1.10.2
0.51min.
* 9.80.6
2.50.35
*
5.0min.
0.46 2.54 20.320.25
0.25 7.62 * : Indicates photodetector location
2.40.2
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IMAGE SENSORS * Pin Connection Block Diagram
CS 18 OS 17 0D 16 f2B 15 f1B 14 fT 13 TP1 12 TP2 11 PG 10
OPA256C-1
BCCD analog shift register Transfer gate Photo-gate 1 2 Photodiodes F255 256 Photo-gate Transfer gate BCCD analog shift register 1 RD 2 fR 3 OG 4 f2A 5 f1A 6 fT 7 TP3 8 TP4 9 VSS SS
Compensating preamplifier Preamplifier Output gate
Symbol RD fR OG f1A f1B f2A f2B fT
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
Symbol TP1 TP2 TP3 TP4 VSS PG OD OS CS
Name 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)
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IMAGE SENSORS
OPA256C-1
ABSOLUTE MAXIMUM RATINGS
Parameter Storage Temperature Operating Temperature Clock Voltage Applied Voltage Symbol Tstg Top Vf VDD Test Condition -- -- Ta=25C Min. -40 -20 -0.3 -0.3 Max. +125 +85 +18 +18 Unit C C V V
ELECTRICAL CHARACTERISTICS
Parameter Reset Drain Voltage Output Transistor Drain Voltage Output Gate Voltage Photo Gate Voltage Substrate Bias Electrical Input Diode Voltage (TP2, 4) Electrical Input Gate Voltage (TP1, 3) "H" CCD register "L" "H" Photo-transfer Reset "L" "H" "L" Symbol VDD VOG VPG VSS VIS VIG
AB Vf1, 2 H
(Ambient Temperature Ta=25C) Min. 11.4 11.4 4.75 4.75 -1.5 11.4 -0.1 7 0 7 0 7 0 0.1 -- -- -- -- -- Typ. 12 12 5 5 -2.0 12 0 VDD 0.4 VDD 0.4 VDD 0.4 -- 80 10 4 80 1 Max. 12.6 12.6 5.25 5.25 -2.5 12.6 0.2 VDD 0.8 VDD 0.8 VDD 0.8 4 -- -- -- -- -- Unit V V V V V V V V V V V V V MHZ pF pF pF mW kW VOD VRD
Clock Pulse Voltage
Vf L
AB Vf 1, 2
AB 1, 2
VfTL VfRH VfRL fV
AB Cf 1, 2
Video Frequency
Clock Input Capacitance
CCD register Photo-transfer Reset
CfT CfR PD RL
Power Dissipation Output Load Resistance
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IMAGE SENSORS
OPA256C-1
POTOELECTRIC CHARACTERISTICS
Parameter Sensitivity Saturation Output Voltage Output Uniformity <*007*> (Overall) Output DC Level Dark Output Voltage *1 2856K tungsten lamp *2 VRD, VDD=12 V, VSS=2.0 V, RL=1 kW *3 When it is 50 percent of the saturation output (2856K tungsten lamp.) However, this excludes the 1st, 2nd, and 256th bits *4 Storage time is assumed to be 10 ms. Symbol RW Vsat U Vdc Vd Min. -- 180 -- -- -- Typ. 1500 250 -- 4.0 -- Max. -- -- 7 -- 4
(Ambient Temperature Ta=25C) Unit mV/ x * sec R mV % V mV Note *1 *2 *3 -- *4
PIXEL CONFIGURATION
Parameter Arrangement Number of Pixels Pixels Pitch Photodiode Width Aperture Width Sensor Length Symbol -- -- P D L Central Value Straight line 256 13 8 18
(Ambient Temperature Ta=25C) Accuracy ---- 2.0 2.0 2.5 Unit -- -- mm mm mm mm
* See output timing for information concerning dummy pixels.
Pixcel Configration Diagram
W
,,
W 3328 3.0
QQ ,, QQ ,, QQ ,, QQ ,, QQQ ,,, QQ ,, QQ Q ,, , Q ,
D P
Light shield layer (Al)
Photodiode D
QQ QQ ,, ,, Q ,
L
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IMAGE SENSORS
OPA256C-1
CLOCK INPUT TIMING CHARACTERISTICS
(Ambient Temperature Ta=25C) Parameter Rise time Register Fall time Overlap time Blank time Rise time Fall time Phototransfer Transfer time duration Setup time Hold time Rise time Fall time Reset Duration Setup time Hold time Symbol trf tff tOf1, 2 tBf1, 2 trfT tffT tWfr tSfT tHfT trfR trfR tWfR tSfR tHfR Min. -- -- 0 -- -- -- 5 0 0 -- -- 80 170 0 Typ. 30 20 20 20 30 20 10 1 1 30 20 -- -- -- Max. 100 100 100 100 100 100 15 10 10 100 100 2000 2000 2000 Unit ns ns ns ns ns ns ms ms ms ns ns ns ns ns *5 *4 Note *1 *2 *3
OPA256C-1 Input Timing Diagrams
*1 f1 AB or f2
AB
trf 90%
f2 AB or f1
AB
100% tff
*2 fA2 or fB1 1 V 2 OG fA1 or fB2 to f1, 2 Limited to periods during fA1 rise and fA2 fall, and fB2 rise and fB1 fall.
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IMAGE SENSORS
OPA256C-1
*3 fA1 or fB2 1 V 2 OG fA2 or fB1 tBf1, 2 Limited to periods during fA2 rise and fA1 fall, and fB1 rise and fB2 fall.
*4
f1
AB
10% tSfT tWfT tHfT 90% 50%
fT
10% trfT tffT
*5
fA1 or fB2
90% 10% 90% 10% tSfR tWfR tHfR 90% 50% 10%
fB2 or fA1
fR
trfR
tffR
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IMAGE SENSORS Input Timing Chart
tINT tS tT tH
OPA256C-1
f1 AB f2 AB fR CS OS D1 D2 D3 Dummy output DW dummy S1 S2 S255 S256
VIDEO OUTPUT TIMING CHARACTERISTICS
(Ambient Temperature Ta=25C) Parameter Video Rise Delay Time Video Rise Time Video Fall Delay Time Video Fall Time VDD=VRD=Vf=12 V Conditions VDG=VPG=5 V VSS=-2 V Symbol tdrv trv tdfv tfv RL=1 kW CL=31 pF Ta=25C Guaranteed Values Min. -- -- -- -- Typ. 55 55 15 30 tff=30 ns trf=35 ns trfR=15 ns Max. -- -- -- -- Unit ns ns ns ns Note -- -- -- --
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IMAGE SENSORS Output Timing Diagrams
tff=30 ns f1A.f2B trf=35 ns 90% 50% 10% trf=R15 ns fR 90% 50% 10%
OPA256C-1
tdrv
tdfv
Video
10% 90%
trv
tfv
TYPICAL CHARACTERISTICS
* Iluminance vs. Output Characteristics
1000 500
Output Voltage (mV)
200 100 50 20 10 5 2 1
ffR=1 MHz RL=1 kW 2856K tungsten lamp Room temperature
m s
VRD=12 V Vf1.2, fT, fR=12 V VOG=5 V VPG=5 V VSS=-2.0 V 50 100 200 500 1000
12
Tin
5 10 20 Illuminance ( x) R
t=
1
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IMAGE SENSORS * Spectral Sensitivity Characteristic
1.0
Relative Output
OPA256C-1
0.5
0.2 0.1 200 400 600 800 1000 1200
VRD=12 V VOG=5 V VPG=5 V VSS=-2.0 V VfR=12 V
Wavelength (nm)
* Dark vs. Temperature Characteristics
1000
Dark Current Output 100(%) Saturation Output
500 200 100
m s
50
Tin t= 25
20 10 5 2 1 0
10 20 30
Ambient Temperature Ta (C)
* M.T.F. Characteristics (White Fluorescent Lamp)
Single pulse (Black) input1
80
M.T.F(%)
60 40 20
Continuous input
1
2
3
,
40 50 60 70 80 90 100
ffR=1 MHz VRD=12 V f1, 2, fR, fT=12 V VOG=5 V VPG=5 V VSS=-2 V RL=1 kW
Relaitive Output
Tin t= 10
m s
Max. Min.
0
Black White Black
White Black
Sensor bit MTF=(Max.-Min.) / (Max.+Min.) 100 (%)
5
10 100 7.7(Line pair/mm)
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DRIVE CIRCUIT
IMAGE SENSORS
+15V +5V
+5V 6.8 5.1K
ID LCO IB IB IA T CL f
0.01
+5
6.8 RD1313
0.01
100
6.8 2K
6.8
0.01
0.01
100 RD13BL
6.8
0.01
200 RD78N
6.8
200
0.01
RD13BL
+5V
5.1K
ID LCO IB IB IA T CL f
5K
5.1K +5V
ID LCO IB IB IA T CL f
Digit GND
ID LCO IB IB IA T CL f
f
Q Q
f1A f1B f2A f2B fH
OPA256C-1
ID LCO IB IB IA T CL f
+5V +5V 300P 2K
+5V
fT fT
JK R +5V JR KQ
f
RD OD TP2 TP4 CS
2SC372
+ Im -
5K
10P 0.01
100K
+ -
5.1K 100K mPC159A 20K 18K 2.7K 1.8K 22P
750 500 1K
300
- +
mA733
5.1K
2SC169
OS
TP1.3 VSS
Analog GND
ID LCO IB IB 74163 IA T CL f
2SC372 + Im - IK IK 300
C CR IB
Q
5.1K
1S2075K
Q
IA
2K
680P
74107
+5V 7404 74123
DS0026CN 6.8
0.01
1.5K 5.1K 6.8 RD78N RD138L 200
500
-15V
OPA256C-1
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