uPD3778 10600 PIXELS × 3 COLOR CCD LINEAR IMAGE

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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD3778
10600 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR
The µPD3778 is a color CCD (Charge Coupled Device) linear image sensor which changes optical images to
electrical signal and has the function of color separation.
The µPD3778 has 3 rows of 10600 pixels, and each row has a double-sided readout type of charge transfer register.
And it has reset feed-through level clamp circuits and voltage amplifiers. Therefore, it is suitable for 1200 dpi/A4 color
image scanners and so on.
FEATURES
• Valid photocell
: 10600 pixels × 3
• Photocell's pitch : 4 µm
• Photocell size
: 4 × 4 µm 2
• Line spacing
: 48 µm (12 lines) Red line-Green line, Green line-Blue line
• Color filter
: Primary colors (red, green and blue), pigment filter (with light resistance 107 lx•hour)
• Resolution
: 48 dot/mm A4 (210 × 297 mm) size (shorter side)
1200 dpi US letter (8.5” × 11”) size (shorter side)
• Drive clock level : CMOS output under 5 V operation
• Data rate
: 5 MHz MAX.
• Power supply
: +12 V
• On-chip circuits : Reset feed-through level clamp circuits
Voltage amplifiers
ORDERING INFORMATION
Part Number
µPD3778CY
Package
CCD linear image sensor 32-pin plastic DIP (10.16 mm (400))
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. S14374EJ2V0DS00 (2nd edition)
Date published October 2002 N CP(K)
Printed in Japan
The mark
shows major revised points.
©
1999
µPD3778
BLOCK DIAGRAM
VOD
GND
GND
φ2
φ1
29
1
16
22
19
CCD analog shift register
18
φ TG1
(Blue)
17
φ TG2
(Green)
15
φ TG3
(Red)
D67
D66
D65
S10600
Photocell
(Blue)
S10599
S2
........
S1
30
D64
VOUT1
(Blue)
D14
Transfer gate
Transfer gate
CCD analog shift register
CCD analog shift register
D67
D66
D65
S10600
Photocell
(Green)
S10599
S2
........
S1
31
D64
VOUT2
(Green)
D14
Transfer gate
Transfer gate
CCD analog shift register
CCD analog shift register
D67
D66
D65
S10600
Photocell
(Red)
S10599
S2
........
S1
32
D64
VOUT3
(Red)
D14
Transfer gate
Transfer gate
CCD analog shift register
2
3
2
14
11
φ CLB
φ RB
φ2
φ1
Data Sheet S14374EJ2V0DS
µPD3778
PIN CONFIGURATION (Top View)
CCD linear image sensor 32-pin plastic DIP (10.16 mm (400))
• µPD3778CY
32
VOUT3
Output signal 3 (Red)
Reset gate clock
φ RB
2
31
VOUT2
Output signal 2 (Green)
Reset feed-through level
clamp clock
φ CLB
3
30
VOUT1
Output signal 1 (Blue)
No connection
NC
4
29
VOD
Output drain voltage
No connection
NC
5
28
NC
No connection
Internal connection
IC
6
27
IC
Internal connection
Internal connection
IC
7
26
IC
Internal connection
No connection
NC
8
25
NC
No connection
No connection
NC
9
24
NC
No connection
No connection
NC
10
23
NC
No connection
Shift register clock 1
φ1
11
22
φ2
Shift register clock 2
Internal connection
IC
12
21
IC
Internal connection
Internal connection
IC
13
20
IC
Internal connection
Shift register clock 2
φ2
14
19
φ1
Shift register clock 1
Transfer gate clock 3
(for Red)
φ TG3
15
18
φ TG1
Transfer gate clock 1
(for Blue)
Ground
GND
16
17
φ TG2
Transfer gate clock 2
(for Green)
Blue
10600
Green
10600
Red
10600
1
1
1
GND
1
Ground
Cautions 1. Leave pins 6, 7, 12, 13, 20, 21, 26, 27 (IC) unconnected.
2. Connect the No connection pins (NC) to GND.
Data Sheet S14374EJ2V0DS
3
µPD3778
PHOTOCELL STRUCTURE DIAGRAM
PHOTOCELL ARRAY STRUCTURE DIAGRAM
(Line spacing)
4 µm
4 µm
2 µm
2 µm
12 lines
(48 µm)
4 µm
Green photocell array
Channel stopper
12 lines
(48 µm)
4 µm
Aluminum
shield
4
Blue photocell array
Data Sheet S14374EJ2V0DS
Red photocell array
µPD3778
ABSOLUTE MAXIMUM RATINGS (TA = +25°C)
Parameter
Symbol
Ratings
Unit
Output drain voltage
VOD
–0.3 to +15
V
Shift register clock voltage
V φ1 , V φ2
–0.3 to +8
V
Reset gate clock voltage
VφRB
–0.3 to +8
V
Reset feed-through level clamp clock voltage
VφCLB
–0.3 to +8
V
Transfer gate clock voltage
VφTG1 to VφTG3
–0.3 to +8
V
Operating ambient temperatureNote
TA
–25 to +60
°C
Storage temperature
Tstg
–40 to +70
°C
Note Use at the condition without dew condensation.
Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any
parameter. That is, the absolute maximum ratings are rated values at which the product is on the
verge of suffering physical damage, and therefore the product must be used under conditions that
ensure that the absolute maximum ratings are not exceeded.
RECOMMENDED OPERATING CONDITIONS (TA = +25°C)
Parameter
Symbol
MIN.
TYP.
MAX.
Unit
Output drain voltage
VOD
11.4
12.0
12.6
V
Shift register clock high level
Vφ1H, Vφ2H
4.5
5.0
5.5
V
Shift register clock low level
Vφ1L, Vφ2L
–0.3
0
+0.5
V
Reset gate clock high level
VφRBH
4.5
5.0
5.5
V
Reset gate clock low level
VφRBL
–0.3
0
+0.5
V
Reset feed-through level clamp clock high level
VφCLBH
4.5
5.0
5.5
V
Reset feed-through level clamp clock low level
VφCLBL
–0.3
0
+0.5
V
Transfer gate clock high level
VφTG1H to VφTG3H
4.5
Vφ1HNote
Vφ1HNote
V
Transfer gate clock low level
VφTG1L to VφTG3L
–0.3
0
+0.5
V
Data rate
fφRB
–
1.0
5.0
MHz
Note
When Transfer gate clock high level (VφTG1H to VφTG3H) is higher than Shift register clock high level (Vφ1H),
Image lag can increase.
Data Sheet S14374EJ2V0DS
5
µPD3778
ELECTRICAL CHARACTERISTICS
TA = +25 °C, VOD = 12 V, data rate (fφRB) = 2 MHz, storage time = 5.5 ms, input signal clock = 5 Vp-p,
light source: 3200 K halogen lamp +C-500S (infrared cut filter, t = 1mm) + HA-50 (heat absorbing filter, t = 3 mm)
Parameter
Symbol
MIN.
TYP.
MAX.
Unit
Vsat
2.0
2.5
–
V
Red
SER
–
0.694
–
lx•s
Green
SEG
–
0.757
–
lx•s
Blue
SEB
–
1.250
–
lx•s
Saturation voltage
Saturation exposure
Test Conditions
Photo response non-uniformity
PRNU
VOUT = 1.0 V
–
6
20
%
Average dark signal
ADS
Light shielding
–
0.2
4.0
mV
Dark signal non-uniformity
DSNU
Light shielding
–
1.5
4.0
mV
Power consumption
PW
–
400
600
mW
Output impedance
ZO
–
0.5
1
kΩ
Red
RR
2.52
3.60
4.68
V/lx•s
Green
RG
2.31
3.30
4.29
V/lx•s
Blue
RB
1.40
2.00
2.60
V/lx•s
–
2.0
10.0
%
4.0
6.0
7.0
V
Response
Image lag
Offset level
IL
Note1
Output fall delay time
VOUT = 1.0 V
VOS
Note2
td
VOUT = 1.0 V
–
50
–
ns
TTE
VOUT = 1.0 V,
92
98
–
%
0
1.0
4.0
%
Red
–
630
–
nm
Green
–
540
–
nm
Blue
–
460
–
nm
Total transfer efficiency
data rate = 5 MHz
Register imbalance
Response peak
RI
Dynamic range
Reset feed-through noise
Random noise (CDS)
Note1
VOUT = 1.0 V
DR1
Vsat /DSNU
–
1666
–
times
DR2
Vsat /σ CDS
–
2500
–
times
RFTN
Light shielding
–1000
–300
+500
mV
σ CDS
Light shielding
–
1.0
–
mV
Notes 1. Refer to TIMING CHART 2.
2. When each fall time of φ1 and φ2 (t2, t1) is the TYP. value (refer to TIMING CHART 2).
6
Data Sheet S14374EJ2V0DS
µPD3778
INPUT PIN CAPACITANCE (TA = +25°C, VOD = 12 V)
Parameter
Pin No.
MIN.
TYP.
MAX.
Unit
11
–
400
–
pF
19
–
400
–
pF
14
–
400
–
pF
22
–
400
–
pF
φRB
2
–
15
–
pF
Reset feed-through level clamp clock pin capacitance CφCLB
φCLB
3
–
15
–
pF
Transfer gate clock pin capacitance
φTG1
18
–
120
–
pF
φTG2
17
–
120
–
pF
φTG3
15
–
120
–
pF
Shift register clock pin capacitance 1
Shift register clock pin capacitance 2
Reset gate clock pin capacitance
Symbol
C φ1
C φ2
CφRB
CφTG
Pin name
φ1
φ2
Remark Pins 11 and 19 (φ1), 14 and 22 (φ2) are each connected inside of the device.
Data Sheet S14374EJ2V0DS
7
8
TIMING CHART 1 (for each color)
8
7
6
5
4
3
2
φ1
1
φ TG1 to
φ TG3
φ2
φ RB
10663
10664
10665
10666
10667
10668
10669
φ CLB
61
62
63
64
65
66
Data Sheet S14374EJ2V0DS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Note
Note
VOUT1 to
VOUT3
Optical black
(49 pixels)
Valid photocell
(10600 pixels)
Invalid photocell
(2 pixels)
Invalid photocell
(3 pixels)
Note Input the φRB and φCLB pulses continuously during this period, too.
µPD3778
µPD3778
TIMING CHART 2 (for each color)
t2
t1
90 %
φ1
10 %
90 %
φ2
10 %
t5
φ RB
t3
t6
t4
90 %
10 %
t10
φ CLB
t8
t7
t9
t11
90 %
10 %
+
td
td
RFTN
VOUT
_
VOS
RFTN
10 %
10 %
Data Sheet S14374EJ2V0DS
9
µPD3778
φTG1 to φTG3, φ1, φ2 TIMING CHART
t13
t14
t12
90 %
φ TG1 to φ TG3
10 %
t16
t15
90 %
φ1
φ2
Symbol
MIN.
TYP.
MAX.
Unit
t1, t2
0
25
–
ns
t3
20
50
–
ns
t4
70
250
–
ns
t5, t6
0
25
–
ns
t7
30
50
–
ns
t8, t9
0
25
–
ns
t10
30
50
–
ns
t11
5
15
–
ns
t12
5000
10000
–
ns
t13, t14
0
50
–
ns
t15, t16
900
1000
–
ns
φ1, φ2 cross points
φ1
2.0 V or more
2.0 V or more
φ2
Remark Adjust cross points of φ1 and φ2 with input resistance of each pin.
10
Data Sheet S14374EJ2V0DS
µPD3778
DEFINITIONS OF CHARACTERISTIC ITEMS
1.
Saturation voltage: Vsat
Output signal voltage at which the response linearity is lost.
2.
Saturation exposure: SE
Product of intensity of illumination (IX) and storage time (s) when saturation of output voltage occurs.
3.
Photo response non-uniformity: PRNU
The output signal non-uniformity of all the valid pixels when the photosensitive surface is applied with the light
of uniform illumination. This is calculated by the following formula.
PRNU (%) =
∆x
× 100
x
∆x : maximum of xj − x 
10600
Σx
x=
j
j=1
10600
xj : Output voltage of valid pixel number j
VOUT
Register Dark
DC level
4.
x
∆x
Average dark signal: ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following formula.
10600
Σd
ADS (mV) =
j
j=1
10600
dj : Dark signal of valid pixel number j
5.
Dark signal non-uniformity: DSNU
Absolute maximum of the difference between ADS and voltage of the highest or lowest output pixel of all the valid
pixels at light shielding. This is calculated by the following formula.
DSNU (mV) : maximum of dj − ADS j = 1 to 10600
dj : Dark signal of valid pixel number j
VOUT
ADS
Register Dark
DC level
DSNU
Data Sheet S14374EJ2V0DS
11
µPD3778
6.
Output impedance: ZO
Impedance of the output pins viewed from outside.
7.
Response: R
Output voltage divided by exposure (Ix•s).
Note that the response varies with a light source (spectral characteristic).
8.
Image Lag: IL
The rate between the last output voltage and the next one after read out the data of a line.
φTG
Light
ON
OFF
VOUT
V1
VOUT
V1
IL (%) =
9.
VOUT
×100
Register imbalance: RI
The rate of the difference between the averages of the output voltage of Odd and Even pixels, against the average
output voltage of all the valid pixels.
n
2
2
n
∑ (V2j – 1 – V2j)
j= 1
RI (%) =
n
1
n
× 100
∑ Vj
j= 1
n : Number of valid pixels
Vj : Output voltage of each pixel
12
Data Sheet S14374EJ2V0DS
µPD3778
10. Random noise (CDS): σCDS
Random noise (CDS) σCDS is defined as the standard deviation of a valid pixel output signal with 100 times (=
100 lines) data sampling at dark (light shielding). σCDS is calculated by the following procedure.
1. One valid photocell in one reading is fixed as measurement point.
2. The output level is measured during the reset feed-through period which is averaged over 100 ns to get “VDi”.
3. The output level is measured during the Video output time averaged over 100 ns to get “VOi”.
4. The correlated double sampling output is defined by “VCDSi = VDi – VOi”.
5. Repeat the above procedure (1 to 4) for 100 times (= 100 lines).
6. Calculate the standard deviation σCDS using the following formula.
100
σCDS (mV) =
Σi=1 (VCDS – V)
i
2
, V=
100
1
100
Σ VCDS
i
100 i=1
Reset feed-through
VOUT
Video output
Data Sheet S14374EJ2V0DS
13
µPD3778
STANDARD CHARACTERISTIC CURVES (Reference Value)
DARK OUTPUT TEMPERATURE
CHARACTERISTIC
8
STORAGE TIME OUTPUT VOLTAGE
CHARACTERISTIC (TA = +25 °C)
2
1
Relative Output Voltage
Relative Output Voltage
4
2
1
0.5
0.2
0.25
0.1
0
10
20
30
40
0.1
50
Operating Ambient Temperature TA(°C)
1
5
10
Storage Time (ms)
TOTAL SPECTRAL RESPONSE CHARACTERISTICS
(without infrared cut filter and heat absorbing filter) (TA = +25 °C)
100
R
G
B
Response Ratio (%)
80
60
40
G
20
B
0
400
500
600
Wavelength (nm)
14
Data Sheet S14374EJ2V0DS
700
800
µPD3778
APPLICATION CIRCUIT EXAMPLE
µ PD3778
1
47 Ω
φ RB
47 Ω
φ CLB
2
3
32
GND
VOUT3
φ RB
VOUT2
φ CLB
VOUT1
B3
31
B2
+12 V
30
4
B1
10 Ω
29
VOD
NC
+
5
28
NC
NC
+5 V
6
0.1 µ F
27
IC
IC
IC
IC
NC
NC
7
47 µ F/25 V
+5 V
26
+
8
25
+
10 µ F/16 V 0.1 µ F
9
24
NC
NC
10
4.7 Ω
φ1
11
NC
NC
φ1
φ2
IC
IC
IC
IC
φ2
φ1
12
4.7 Ω
4.7 Ω
φ TG
14
15
22
10 µ F/16 V
4.7 Ω
21
13
φ2
0.1 µ F
23
20
φ TG3
φ TG1
GND
φ TG2
16
19
4.7 Ω
18
4.7 Ω
17
4.7 Ω
Cautions 1. Leave pins 6, 7, 12, 13, 20, 21, 26, 27 (IC) unconnected.
2. Connect the No connection pins (NC) to GND.
Remark The inverters shown in the above application circuit example are the 74HC04 or 74AC04.
Data Sheet S14374EJ2V0DS
15
µPD3778
B1 to B3 EQUIVALENT CIRCUIT
12 V
+
100 Ω
CCD
VOUT
100 Ω
47 µF/25 V
2SC945
2 kΩ
16
Data Sheet S14374EJ2V0DS
µPD3778
PACKAGE DRAWING
µ PD3778CY
CCD LINEAR IMAGE SENSOR 32-PIN PLASTIC DIP (10.16 mm (400) )
(Unit : mm)
55.2±0.5
54.8±0.5
1st valid pixel
6.15±0.3
1
32
1
9.25±0.3
9.05±0.3
17
16
46.7
2.0
12.6±0.5
4.1±0.5
10.16±0.20
4.55±0.5
1.02±0.15
(1.80)
2
2.58±0.3
0.46±0.1
(5.42)
2.54±0.25
4.21±0.5
3
0.25±0.05
10.16 +0.7
−0.2
Name
Dimensions
Refractive index
Plastic cap
52.2×6.4×0.7
1.5
1 1st valid pixel
The center of the pin1
2 The surface of the CCD chip
The top of the cap
3 The bottom of the package
The surface of the CCD chip
32C-1CCD-PKG7-1
Data Sheet S14374EJ2V0DS
17
µPD3778
RECOMMENDED SOLDERING CONDITIONS
When soldering this product, it is highly recommended to observe the conditions as shown below.
If other soldering processes are used, or if the soldering is performed under different conditions, please make sure
to consult with our sales offices.
Type of Through-hole Device
µPD3778CY : CCD linear image sensor 32-pin plastic DIP (10.16 mm (400))
Process
Partial heating method
Conditions
Pin temperature: 300 °C or below,
Heat time: 3 seconds or less (per pin)
Cautions 1. During assembly care should be taken to prevent solder or flux from contacting the plastic cap.
The optical characteristics could be degraded by such contact.
2. Soldering by the solder flow method may have deleterious effects on prevention of plastic cap
soiling and heat resistance. So the method cannot be guaranteed.
18
Data Sheet S14374EJ2V0DS
µPD3778
NOTES ON HANDLING THE PACKAGES
1 DUST AND DIRT PROTECTING
The optical characteristics of the CCD will be degraded if the cap is scratched during cleaning. Don’t either
touch plastic cap surface by hand or have any object come in contact with plastic cap surface. Should dirt
stick to a plastic cap surface, blow it off with an air blower. For dirt stuck through electricity ionized air is
recommended. And if the plastic cap surface is grease stained, clean with our recommended solvents.
CLEANING THE PLASTIC CAP
Care should be taken when cleaning the surface to prevent scratches.
We recommend cleaning the cap with a soft cloth moistened with one of the recommended solvents below.
Excessive pressure should not be applied to the cap during cleaning. If the cap requires multiple cleanings it is
recommended that a clean surface or cloth be used.
RECOMMENDED SOLVENTS
The following are the recommended solvents for cleaning the CCD plastic cap.
Use of solvents other than these could result in optical or physical degradation in the plastic cap.
Please consult your sales office when considering an alternative solvent.
Solvents
Ethyl Alcohol
Methyl Alcohol
Isopropyl Alcohol
N-methyl Pyrrolidone
Symbol
EtOH
MeOH
IPA
NMP
2 MOUNTING OF THE PACKAGE
The application of an excessive load to the package may cause the package to warp or break, or cause chips
to come off internally. Particular care should be taken when mounting the package on the circuit board. Don't
have any object come in contact with plastic cap. You should not reform the lead frame. We recommended to
use a IC-inserter when you assemble to PCB.
Also, be care that the any of the following can cause the package to crack or dust to be generated.
1. Applying heat to the external leads for an extended period of time with soldering iron.
2. Applying repetitive bending stress to the external leads.
3. Rapid cooling or heating
3 OPERATE AND STORAGE ENVIRONMENTS
Operate in clean environments. CCD image sensors are precise optical equipment that should not be subject
to mechanical shocks. Exposure to high temperatures or humidity will affect the characteristics. So avoid
storage or usage in such conditions.
Keep in a case to protect from dust and dirt. Dew condensation may occur on CCD image sensors when the
devices are transported from a low-temperature environment to a high-temperature environment. Avoid such
rapid temperature changes.
For more details, refer to our document "Review of Quality and Reliability Handbook" (C12769E)
4 ELECTROSTATIC BREAKDOWN
CCD image sensor is protected against static electricity, but destruction due to static electricity is sometimes
detected. Before handling be sure to take the following protective measures.
1.
2.
3.
4.
5.
6.
Ground the tools such as soldering iron, radio cutting pliers of or pincer.
Install a conductive mat or on the floor or working table to prevent the generation of static electricity.
Either handle bare handed or use non-chargeable gloves, clothes or material.
Ionized air is recommended for discharge when handling CCD image sensor.
For the shipment of mounted substrates, use box treated for prevention of static charges.
Anyone who is handling CCD image sensors, mounting them on PCBs or testing or inspecting PCBs on
which CCD image sensors have been mounted must wear anti-static bands such as wrist straps and ankle
straps which are grounded via a series resistance connection of about 1 MΩ.
Data Sheet S14374EJ2V0DS
19
µPD3778
[MEMO]
20
Data Sheet S14374EJ2V0DS
µPD3778
[MEMO]
Data Sheet S14374EJ2V0DS
21
µPD3778
[MEMO]
22
Data Sheet S14374EJ2V0DS
µPD3778
NOTES FOR CMOS DEVICES
1
PRECAUTION AGAINST ESD FOR SEMICONDUCTORS
Note:
Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and
ultimately degrade the device operation. Steps must be taken to stop generation of static electricity
as much as possible, and quickly dissipate it once, when it has occurred. Environmental control
must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using
insulators that easily build static electricity. Semiconductor devices must be stored and transported
in an anti-static container, static shielding bag or conductive material. All test and measurement
tools including work bench and floor should be grounded. The operator should be grounded using
wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need
to be taken for PW boards with semiconductor devices on it.
2
HANDLING OF UNUSED INPUT PINS FOR CMOS
Note:
No connection for CMOS device inputs can be cause of malfunction. If no connection is provided
to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence
causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels
of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused
pin should be connected to V DD or GND with a resistor, if it is considered to have a possibility of
being an output pin. All handling related to the unused pins must be judged device by device and
related specifications governing the devices.
3
STATUS BEFORE INITIALIZATION OF MOS DEVICES
Note:
Power-on does not necessarily define initial status of MOS device. Production process of MOS
does not define the initial operation status of the device. Immediately after the power source is
turned ON, the devices with reset function have not yet been initialized. Hence, power-on does
not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the
reset signal is received. Reset operation must be executed immediately after power-on for devices
having reset function.
Data Sheet S14374EJ2V0DS
23
µPD3778
• The information in this document is current as of September, 2002. The information is subject to
change without notice. For actual design-in, refer to the latest publications of NEC's data sheets or
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M8E 00. 4