The µPD3788 is a high-speed and high sensitive color CCD (Charge Coupled Device) linear image sensor which
changes optical images to electrical signal and has the function of color separation.
µ
PD3788 has 3 rows of 7300 pixels, and it is a 2-output/color type CCD sensor with 2 rows/color of charge
The
transfer register, which transfers the photo signal electrons of 7300 pixels separately in odd and even pixels.
Moreover, the spectral response characteristics of the µPD3788 is modified from the previous device µPD3728 to be
suitable for Xe-lamp. Therefore, it is suitable for 600 dpi/A3 high-speed color digital copiers and so on.
FEATURES
• Valid photocell: 7300 pixels × 3
• Photocell pitch: 10 µm
2
µ
• Photocell size: 10 × 10
• Line spacing: 40 µm (4 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)
PD3788DCCD linear image sensor 36-pin ceramic DIP (15.24 mm (600))
m
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. S14664EJ1V0DS00(1st edition)
Date published June 2000 N CP(K)
Printed in Japan
Note Set the φRB to high level during this period.
φ
Remark Inverse pulse of the
φ
1 (φ10), φ2 (φ20) cross points
1 ( 10)
φφφ
2 V or more2 V or more
2 ( 20)
φφ
TG1 to φTG3 can be used as φCLB.
φ
1L, φ2 (φ20) cross points
2 ( 20)
φ
1L
φ
2 V or more0.5 V or more
Remark Adjust cross points (φ1 (φ10), φ2 (φ20)) and (φ1L, φ2 (φ20)) with input resistance of each pin.
14
Data Sheet S14664EJ1V0DS00
Page 15
µ
PD3788
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 (I
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.
X) and storage time (s) when saturation of output voltage occurs.
PRNU (%) =
4.Average dark signal: ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following formula.
ADS (mV) =
∆x
× 100
x
∆x : maximum of x
x =
x
V
OUT
Register Dark
DC level
7300
d
j
Σ
j=1
7300
j
: Dark signal of valid pixel number j
d
j
− x
7300
x
j
Σ
j=1
7300
j
: Output voltage of valid pixel number j
∆x
x
Data Sheet S14664EJ1V0DS00
15
Page 16
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 d
− ADS
j = 1 to 7300
j
dj : Dark signal of valid pixel number j
V
OUT
ADS
Register Dark
DC level
DSNU
µ
PD3788
6.Output impedance: Z
O
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.
φ
TG
Light
OUT
V
V
IL (%) = ×100
V
OUT
ONOFF
V
1
V
OUT
1
16
Data Sheet S14664EJ1V0DS00
Page 17
µ
PD3788
9.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
(V2j – 1 –V2j)
∑
n
RI (%) =
j = 1
1
∑
n
j = 1
n
V j
×100
n : Number of valid pixels
j : Output voltage of each pixel
V
10. Random noise: σ
Random noise σ is defined as the standard deviation of a valid pixel output signal with 100 times (=100 lines)
data sampling at dark (light shielding).
100
(Vi – V)
σ (mV) = , V =
Σ
i=1
2
100
i: A valid pixel output signal among all of the valid pixels for each color
V
OUT
1
100
100
Σ
i=1
Vi
V
1
V
2
…
V
100
line 1V
line 2
…
line 100
This is measured by the DC level sampling of only the signal level, not by CDS (Correlated Double Sampling).
Data Sheet S14664EJ1V0DS00
17
Page 18
STANDARD CHARACTERISTIC CURVES (Nominal)
DARK OUTPUT TEMPERATURE
CHARACTERISTIC
8
4
2
1
0.5
Relative Output Voltage
0.25
STORAGE TIME OUTPUT VOLTAGE
CHARACTERISTIC (T
2
1
Relative Output Voltage
0.2
A = +25 °C)
µ
PD3788
0.1
10020304050
Operating Ambient Temperature T
(without infrared cut filter and heat absorbing filter) (T
100
80
60
40
Response Ratio (%)
20
B
0.1
1510
A(°C)Storage Time (ms)
TOTAL SPECTRAL RESPONSE CHARACTERISTICS
R
G
A
= +25 °C)
B
G
18
0
400
500600
Wavelength (nm)
Data Sheet S14664EJ1V0DS00
700800
Page 19
APPLICATION CIRCUIT EXAMPLE
µ
PD3788
+5 V
+
µµ
10 F/16 V 0.1 F
B4
B6
B5
47 Ω
φ
RB
2 Ω
2 Ω
2
φφ
2 Ω
2 Ω
PD3788
µ
1
V
OUT
4
2
GND
3
OUT
6
4
5
OUT
5
6
GND
7
V
OD
8
φφ
RB
9
φφ
1020
10
NCNC
11
NC
12
NC
13
1
φ
14
φ
2
15
TG3
φ φ φ
16
GND
17
NC
18
NC
36
V
OUT
3
35
GND
34
V
OUT
1V
33
GNDGND
32
V
OUT
2V
31
GND
30
φ
CLB
29
1L
28
27
26
NC
25
NC
24
φ
2
23
φ
1
22
TG1
21
TG2
φ
20
NC
19
NC
B3
B1
B2
47 Ω
47 Ω
2 Ω
2 Ω
2 Ω
2 Ω
2 Ω
+
47 F/25 V0.1 F
µ
µ
µµ
10 F/16 V0.1 F
10 Ω
+
φ
+12 V
+5 V
CLB
1
TG
Remarks 1. Pin 9 (φ10) and pin 28 (φ20) should be open to decrease the influence of input clock noise to output
signal waveform, in case of operating at low or middle speed range; data rate under 24 MHz or so.
2. The inverters shown in the above application circuit example are the 74AC04.
Data Sheet S14664EJ1V0DS00
19
Page 20
µ
PD3788
B1 to B6 EQUIVALENT CIRCUIT
4.7 kΩ
CCD
V
OUT
47 Ω
2SA1005
110 Ω
+12 V
2SC945
47 F/25 V
µ
+
µ
0.1 F
1 kΩ
20
Data Sheet S14664EJ1V0DS00
Page 21
PACKAGE DRAWING
CCD LINEAR IMAGE SENSOR 36-PIN CERAMIC DIP (15.24mm (600))
(Unit : mm)
94.00±0.50
1
9.5±0.9
14.99±0.3
2
(35.0)
The 1st valid pixel
(4.33)
15.24
µ
PD3788
1.27±0.05
0.46±0.05
88.9±0.6
1 The 1st valid pixel The center of the pin1
2 The 1st valid pixel The center of the package (Reference)
3 The surface of the chip The top of the glass cap (Reference)
4 The bottom of the package The surface of the chip
2.54
20.32
3.50±0.5
0.97±0.3
3.30±0.35
NameDimensionsRefractive index
Glass cap93.0 × 13.6 × 1.01.5
(2.33)
2.0±0.3
0.25±0.05
3
4
Data Sheet S14664EJ1V0DS00
36D-1CCD-PKG1-2
21
Page 22
µ
PD3788
NOTES ON THE USE 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.
When mounting the package, use a circuit board which will not subject the package to bending stress, or use a
socket.
Note
For this product, the reference value for the three-point bending strength
however, on the inside portion as viewed from the face on which the window (glass) is bonded to the package body
(ceramic).
Note Three-point bending strength test
Distance between supports: 70 mm, Support R: R 2 mm, Loading rate: 0.5 mm / min.
LoadLoad
is 300 [N]. Avoid imposing a load,
70 mm70 mm
22
Data Sheet S14664EJ1V0DS00
Page 23
NOTES FOR CMOS DEVICES
1PRECAUTION 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.
2HANDLING 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
being an output pin. All handling related to the unused pins must be judged device by device and
related specifications governing the devices.
DD or GND with a resistor, if it is considered to have a possibility of
µ
PD3788
3STATUS 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 S14664EJ1V0DS00
23
Page 24
µ
PD3788
•
The information in this document is current as of May, 2000. The information is subject to change
without notice. For actual design-in, refer to the latest publications of NEC's data sheets or data
books, etc., for the most up-to-date specifications of NEC semiconductor products. Not all products
and/or types are available in every country. Please check with an NEC sales representative for
availability and additional information.
•
No part of this document may be copied or reproduced in any form or by any means without prior
written consent of NEC. NEC assumes no responsibility for any errors that may appear in this document.
•
NEC does not assume any liability for infringement of patents, copyrights or other intellectual property rights of
third parties by or arising from the use of NEC semiconductor products listed in this document or any other
liability arising from the use of such products. No license, express, implied or otherwise, is granted under any
patents, copyrights or other intellectual property rights of NEC or others.
•
Descriptions of circuits, software and other related information in this document are provided for illustrative
purposes in semiconductor product operation and application examples. The incorporation of these
circuits, software and information in the design of customer's equipment shall be done under the full
responsibility of customer. NEC assumes no responsibility for any losses incurred by customers or third
parties arising from the use of these circuits, software and information.
•
While NEC endeavours to enhance the quality, reliability and safety of NEC semiconductor products, customers
agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. To minimize
risks of damage to property or injury (including death) to persons arising from defects in NEC
semiconductor products, customers must incorporate sufficient safety measures in their design, such as
redundancy, fire-containment, and anti-failure features.
•
NEC semiconductor products are classified into the following three quality grades:
"Standard", "Special" and "Specific". The "Specific" quality grade applies only to semiconductor products
developed based on a customer-designated "quality assurance program" for a specific application. The
recommended applications of a semiconductor product depend on its quality grade, as indicated below.
Customers must check the quality grade of each semiconductor product before using it in a particular
application.
"Standard": Computers, office equipment, communications equipment, test and measurement equipment, audio
and visual equipment, home electronic appliances, machine tools, personal electronic equipment
and industrial robots
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
"Specific": Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems and medical equipment for life support, etc.
The quality grade of NEC semiconductor products is "Standard" unless otherwise expressly specified in NEC's
data sheets or data books, etc. If customers wish to use NEC semiconductor products in applications not
intended by NEC, they must contact an NEC sales representative in advance to determine NEC's willingness
to support a given application.
(Note)
(1) "NEC" as used in this statement means NEC Corporation and also includes its majority-owned subsidiaries.
(2) "NEC semiconductor products" means any semiconductor product developed or manufactured by or for
NEC (as defined above).
M8E 00. 4
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