TCD2953CF
2003-06-04
1
TOSHIBA CCD Image Sensor
CCD (charge coupled device)
T C D 2 9 5 3 C F
The TCD2953CF is a high sensitive and low dark current
10680 elements 6 line CCD color image sensor which includes
CCD drive circuit and clamp circuit. The sensor is designed for
scanner.
The device contains a row of 10680 elements 6 line staggered
photodiodes which provide a 96 lines/mm (2400DPI) across a A4
size paper. The device is operated by 5 V pulse, and 12 V power
supply.
Features
Number of image sensing elements: 10680 elements 6 line
Image sensing element pitch: 4 m
Photo sensing region: High sensitive and low dark current PN photodiode
Distance between photodiode array: 64 m (16 lines), Red line-Green line, Green line-Blue line
8
m (2 lines), Odd line-Even-line
Clock: 2 phase (5 V)
Power supply: 12 V power supply voltage
Internal circuit: Clamp circuit
Package: 32 pin CLCC package
Color filter: Red, green, blue
Overflow drain for antiblooming
Maximum Ratings
(Note1)
Characteristics Symbol
Rating
Unit
Clock pulse voltage
V
Shift pulse voltage
V
SH
Reset pulse voltage
VRS
Clamp pulse voltage
V
CP
-
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).
Preliminary
OS2
32
OS1
OD
SS
1A4
31
30
29
28
27
26
OS3
1
2
3
4
5
6
7
SS
RS
CP
NC
NC
NC
NC
25
24
23
22
8
9
10
11
NC
NC
NC
NC
NC
1
R
21360
1
1
21360
21360
G
B
Pin Connections
(top view)
SS
1A1
NC
NC
21
12
2A3
1A3
SH1
20
19
18
17
13
14
15
16
2A2
1A2
SH3
SS
SH2
2A1
2A4
TCD2953CF
2003-06-04
2
Circuit Diagram
CCD ANALOG SHIFT REGISTER 1
SHIFT GATE 1
CLAMP
29
28
31
18
OS2
OS1
OD SS
SS
RS
CP
1A4
SH1
2A1
1A1
4
19
OS3
D16
D18
D60
D62
S1
S3
D64
D66
74
D76
S
21359
S
21357
PHOTO
DIODE (B)
(odd line)
SH3
D14
SHIFT GATE 2
CCD ANALOG SHIFT REGISTER 2
D15
D17
D59
D61
D63
S2
S4
S
21360
D65
73
D75
S
21358
S
21356
PHOTO
DIODE (B)
(even line)
D13
30
20
21
27
CCD ANALOG SHIFT REGISTER 3
SHIFT GATE 3
CLAMP
32
17 SH2
D16
D18
D60
D62
S1
S3
S5
D64
D66
74
D76
S
21359
S
21357
PHOTO
DIODE (G)
(odd line)
D14
SHIFT GATE 4
D15
D17
D59
D61
D63
S2
S4
S
21360
D65
73
D75
S
21358
S
21356
PHOTO
DIODE (G)
(even line)
D13
SHIFT GATE 5
CLAMP
1
D16
D18
D60
D62
S1
S3
S5
D64
D66
74
D76
S
21359
S
21357
PHOTO
DIODE (R)
(odd line)
D14
SHIFT GATE 6
CCD ANALOG SHIFT REGISTER 6
D15
D17
D59
D61
D63
S2
S4
S
21360
D65
73
D75
S
21358
S
21356
PHOTO
DIODE (R)
(even line)
D13
15
16
3
14
2
13
12
5
2A3
1A3
2A4
SS
SS
1A2
CCD ANALOG SHIFT REGISTER 4
CCD ANALOG SHIFT REGISTER 5
2A2
TCD2953CF
2003-06-04
3
Pin Names
Pin
No.
Symbol Name
Pin
No.
Symbol Name
1
OS3
Signal output 3 (red)
32
OS2
Signal output 2 (green)
2
SS
Ground
31
OS1
Signal output 1 (blue)
3
RS Reset
gate
30 OD Power
4 SS
Ground
29 CP Clamp
gate
5
1A1
Clock 1 (phase 1)
28
SS
Ground
6 NC
Non
connection
27
1A4
Clock 4 (phase 1)
7
NC
Non connection
26
NC
Non connection
8
NC
Non connection
25
NC
Non connection
9
NC
Non connection
24
NC
Non connection
10
NC
Non connection
23
NC
Non connection
11
NC
Non connection
22
NC
Non connection
12
2A1
Clock 1 (phase 2)
21
2A4
Clock 4 (phase 2)
13
2A2
Clock 2 (phase 2)
20
2A3
Clock 3 (phase 2)
14
1A2
Clock 2 (phase 1)
19
1A3
Clock 3 (phase 1)
15
SH3
Shift gate 3
18
SH1
Shift gate 1
16
SS
Ground
17
SH2
Shift gate 2
Optical/Electrical Characteristics
(Ta
=
=
=
= 25C, V
OD
=
=
=
= 12 V, V
=
=
=
= V
SH
=
=
=
=
V
RS
=
=
=
=
V
CP
=
=
=
= 5 V (pulse), f
=
=
=
= 1 MHz, f
RS
=
=
=
= 2 MHz,
t
INT
=
=
=
= 11 ms, LIGHT SOURCE ==== A LIGHT SOURCE ++++ CM500S FILTER (t ==== 1 mm),
LOAD RESISTANCE
=
=
=
= 100 k
)
Characteristics Symbol
Min
Typ.
Max
Unit
Note
Red R
(R)
1.0
1.5
2.0
Green R
(G)
1.4
2.0
2.6
Sensitivity
Blue R
(B)
0.9
1.4
1.9
V/lx
s (Note
2)
PRNU (1)
15 20 % (Note
3)
Photo response non uniformity
PRNU (3)
3 12 mV
(Note
4)
Register imbalance
RI
1 3 % (Note
5)
Saturation Output Voltage
V
SAT
3.2
3.6
V
(Note
6)
Saturation Exposure
SE
1.23
1.80
lx
s (Note
7)
Dark signal Voltage
V
DRK
0.5 2.0 mV (Note
8)
Dark Signal Non Uniformity
DSNU
2.0 7.0 mV (Note
8)
DC Power Dissipation
P
D
420
585
mW
Total Transfer Efficiency
TTE
92
98
%
Output Impedance
Z
O
0.3 1.0 k
DC Compensation Output Voltage
V
OS
5.0
6.0
7.0
V
(Note
9)
Random Noise
N
D
0.8
mV
(Note
10)
Reset Noise
V
RSN
0.3 1.0 V (Note
9)
Masking Noise
V
MS
0.2 1.0 V (Note
9)
TCD2953CF
2003-06-04
4
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.
PRNU
(1)
=
x
x
100 (%)
Where
x
is average of total signal output and
X is the maximum deviation from
x
.
The amount of incident light is shown below.
Red
= 1/2SE
Green
= 1/2SE
Blue
= 1/4SE
Note 4: PRNU (3) is defined as maximum voltage with next pixels, where measured at 5% of SE (typ.).
Note 5: Register imbalance is defined as follows.
(%)
100
x
21359
1)
(n
x
xn
RI
21359
1
n
+
-
=
=
Note 6: VSAT is defined as minimum saturation output of all effective pixels.
Note 7: Definition of SE
SE
=
G
R
SAT
V
(lxs)
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 is defined as follows. Reset noise voltage is defined as follows.
Masking noise voltage is defined as follows.
V
MDK
V
DRK
DSNU
SS
V
OS
V
RSN
V
MS
OS
TCD2953CF
2003-06-04
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. darkconditions) 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 V.
V = V (n) - V (n + 1)
(4) The standard deviation of V is calculated after procedure (2) and (3) are repeated 30 times (30
readings).
30
1
=
i
|
Vi
|
30
1
=
V
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.
10
1
j
j
10
1
=
=
(7)
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.
2
1
ND
=
video output
video output
200 ns
200 ns
pixel (n)
pixel (n
+
1)
V
Output waveform
(effective pixels under
dark condition)
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