TCD2561D
2001-12-06
1
TOSHIBA CCD Linear Image Sensor CCD (charge coupled device)
TCD2561D
The TCD2561D is a high sensitive and low dark current 5340
elements 4 line CCD color image sensor which includes CCD
drive circuit, clamp circuit.
The sensor is designed for scanner. The device contains a row of
5340 elements 4 line photodiodes which provide a 24 lines/mm
across a A4 size paper. The device is operated by 5 V pulse and
12 V power supply.
Features
Number of image sensing elements: 5340 elements 4 line
Image sensing element size: 7 m 7 m on 7 m centers
Photo sensing region: High sensitive PN photodiode
Distanced between photodiode array: Color (28 m, 4 lines), B/W-color (56 m, 8 lines)
Clock: 2 phase (5 V)
Power supply: 12 V power supply voltage
Internal circuit: Clamp circuit
Package: 22 Pin CERDIP package
Color filter: Red, green, blue
Maximum Ratings
(Note1)
Characteristic Symbol
Rating
Unit
Clock pulse voltage
V
B
V
Shift pulse voltage
V
SH
V
Reset pulse voltage
VRS
V
Clamp pulse voltage
V
CP
V
Changeover switch voltage
V
SW
-
0.3~8.0
V
Power supply voltage
V
OD
-
0.3~15 V
Operating temperature
T
opr
0~60
C
Storage temperature
T
stg
-
25~85 C
Note 1: All voltage are with respect to SS terminals (ground).
Weight: 5.2 g (typ.)
OS2
22
OS1
OD
SS
1
SW
f
2A3
21
20
19
18
17
16
OS3
1
2
3
4
5
6
7
SS
RS
CP
2
SW
f
1A3
SS
NC
f
2A1
f
1A1
SH0
15
14
13
12
8
9
10
11
f
2A2
f
1A2
SH3
SH2
SH1
1
Red
5340
1
1
5340
5340
Green
B
l
ue
1
5340
Bla
c
k & W
h
ite
Pin Connections
(top view)
TCD2561D
2001-12-06
2
Circuit Diagram
Pin Names
OS3
Signal Output 3 (red)
OS2
Signal Output 2 (green)
SS
Ground
OS1
Signal Output 1 (blue)
RS
Reset
Gate
OD Power
CP
Clamp
Gate
SS Ground
2
SW
Changeover Switch 2 (color and B/W)
1
SW
Changeover Switch 1 (color and B/W)
f
1A3
Clock 3 (phase 1)
f
2A3
Clock 3 (phase 2)
SS Ground
NC Non
Connection
f
2A2
Clock 2 (phase 2)
f
2A1
Clock 1 (phase 2)
f
1A2
Clock 2 (phase 1)
f
1A1
Clock 1 (phase 1)
SH3
Shift Gate 3
SH0
Shift Gate 0
SH2
Shift Gate 2
SH1
Shift Gate 1
3
CCD ANALOG SHIFT REGISTER (EVEN)
SHIFT GATE SH0
D26
SHIFT GATE SH0
CCD ANALOG SHIFT REGISTER (ODD)
Clamp
Clamp
Clamp
Clamp
Clamp
4
18
19
20
9
8
15
13
OS2
OS1
OD SS
1
SW
f
2A3
SS
RS
CP
f
1A3
f
2A1
SH0
f
2A2
f
1A2
7
6
17
1
22
21
OS3
SW1
SW1
SW2
SW2
D27
D28
D125
D126
D127
S1
S2
S
5340
D128
148
D149
S
5339
S
5338
PHOTO
DIODE
(Black & White)
D26
D27
D28
D125
D126
D127
S1
S2
S
5340
D128
148
D149
S
5339
S
5338
PHOTO
DIODE
(blue)
SHIFT GATE SH1
CCD ANALOG SHIFT REGISTER
D26
SHIFT GATE SH2
CCD ANALOG SHIFT REGISTER
D27
D28
D125
D126
D127
S1
S2
S
5340
D128
148
D149
S
5339
S
5338
PHOTO
DIODE
(green)
D26
D27
D28
D125
D126
D127
S1
S2
S
5340
D128
148
D149
S
5339
S
5338
PHOTO
DIODE
(red)
SHIFT GATE SH3
CCD ANALOG SHIFT REGISTER
5
2
SW
12 SH1
14
f
1A1
11 SH2
10 SH3
TCD2561D
2001-12-06
3
Optical/Electrical Characteristics
(Ta
=
=
=
=
25C, V
OD
=
=
=
=
12 V, V
B
B
B
B
=
=
=
=
V
RS
=
=
=
=
V
SH
=
=
=
=
V
CP
=
=
=
=
5 V (pulse), f
B
B
B
B
=
=
=
=
1.0 MHz, f
RS
=
=
=
=
1.0 MHz,
LOAD RESISTANCE
=
=
=
=
100 k
W
W
W
W
, t
INT
(INTEGRATION TIME)
=
=
=
=
10 ms,
LIGHT SOURCE
=
=
=
=
A LIGHT SOURCE
+
+
+
+
CM500S FILTER (t
=
=
=
=
1.0 mm))
Characteristics Symbol
Min
Typ.
Max
Unit
Note
R
B/W
16.8
21.0
25.2
R
R
6.3
9.0
11.7
R
G
7.3
10.5
13.7
Sensitivity
R
B
3.8
5.5
7.2
V/(lx
s) (Note
2)
PRNU (1)
10 20 % (Note
3)
Photo response non uniformity
PRNU (3)
3 12 mV (Note
4)
Image lag
IL
1
% (Note
5)
Saturation output voltage (B/W)
V
SAT (B/W)
1.5
2.0
V (Note
6)
Saturation output voltage (color)
V
SAT (color)
3.2
3.5
V (Note
6)
Saturation exposure
SE
0.1
lx
s (Note
7)
Dark signal voltage
V
DRK
0.4 2.0 mV (Note
8)
Dark signal non uniformity
DSNU
7 12 mV (Note
8)
DC power dissipation
P
D
480
690
mW
Total transfer efficiency
TTE
92
%
Output impedance
Z
O
0.3 1.0 k
W
DC signal output voltage
V
OS
5.0
6.0
7.0
V
(Note
9)
Random noise
N
D
I
1.0
mV
(Note
10)
Reset noise
V
RSN
0.5 1.0 V (Note
9)
Note 2: Sensitivity is defined for each color of signal outputs average when the photosensitive surface is applied
with the light of uniform illumination and uniform color temperature.
Note 3: PRNU (1) is defined for each color on a single chip by the expressions below when the photosensitive
surface is applied with the light of uniform illumination and uniform color temperature.
D
X
PRNU (1)
=
X
100 (%)
When X is average of total signal output and
D
X is the maximum deviation from X . The amount of
incident light is shown below.
1
1
1
Red
=
2
SE, Green
=
2
SE, Blue
=
4
SE
Note 4: PRNU (3) is defined as maximum voltage with next pixel, where measured 5% of SE (typ.)
TCD2561D
2001-12-06
4
Note 5: Image Lag is defined as follows.
Note 6: V
SAT
is defined as minimum saturation output of all effective pixels.
Note 7: Definition of SE:
Note 8: V
DRK
is defined as average dark signal voltage of all effective pixels. DSNU is defined as different voltage
between V
DRK
and V
MDK
when V
MDK
is maximum dark signal voltage.
Note 9: DC signal Output Voltage and Reset Noise is defined as follows, but Reset Noise is a fixed pattern noise.
SH
OS
LED
OFF
ON
Signal
(500 mV)
Image Lag
V
SAT
SE
=
R
B/W
(lx
s)
V
MDK
V
DRK
DSNU
SS
V
OS
V
RSN
OS
TCD2561D
2001-12-06
5
Note 10: Random noise is defined as the standard deviation (sigma) of the output level difference between two
adjacent effective pixels under no illumination (i.e. dark conditions) calculated by the following procedure.
(1) Two adjacent pixels (pixel n and n + 1) in one reading are fixed as measurement points.
(2) Each of the output level at video output periods averaged over 200 ns period to get V (n) and V (n + 1).
(3) V
(n
+ 1) is subtracted from V (n) to get DV.
DV = V (n) - V (n + 1)
(4) The standard deviation of DV is calculated after procedure (2) and (3) are repeated 30 times (30
readings)
=
D
=
D
30
1
Vi
30
1
V
i
=
D
D
=
s
|
|
30
1
i
2
)
V
V
(
30
1
i
(5) Procedure (2), (3) and (4) are repeated 10 times to get sigma value.
(6) 10 sigma values are averaged.
=
s
=
s
10
1
j
j
10
1
(7)
I value calculated using the above procedure is observed 2 times larger than that measured
relative to the ground level. So we specify random noise as follows.
s
=
I
2
1
N
D
Output waveform (effective pixels under dark condition)
video output
video output
200 ns
200 ns
pixel (n)
pixel (n
+
1)
D
V
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