MN3611RE Datasheet, PDF (5/6 Pages) Panasonic Semiconductor – Color CCD Linear Image Sensor with 720 Pixels each for R, G, and B Colors

MN3611RE
CCD Linear Image Sensor
s Construction of the Image Sensor
The MN3611RE can be made up of the three sections of—a)
photo detector region, b) CCD transfer region (shift register),
and c) output region.
a) Photo detector region
• The photoelectric conversion device consists of an 11µm
floating photodiode and a 3µm channel stopper for each
pixel, and 2160 of these devices are linearly arranged side by
side at a pitch of 14µm.
• The photo detector's windows are 14µm × 14µm squares and
light incident on areas other than these windows is optically
shut out.
• The photo detector is provided with 52 optically shielded
pixels (black dummy pixels) which serve as the black
reference.
b) CCD Transfer region (shift register)
• The light output that has been photoelectrically converted is
transferred to the CCD transfer for each odd and even pixel at
the timing of the shift clock (øSG). The optical signal electric
charge transferred to this analog shift register is successively
transferred out and guided to the output region.
• A buried type CCD that can be driven by a two phase clock
(ø1, ø2) is used for the analog shift register.
c) Output region
• The signal charge that is transferred to the output region is
sent to the detector where impedance transformation is done
using two source follower stages.
• The DC level component and the clock noise component not
containing optical signals are output from the DS pin.
• By carrying out differential amplification of the two outputs
OS and DS externally, it is possible to obtain an output signal
with a high S/N ratio by reducing the clock noise, etc.
s Timing Diagram
(1) I/O timing
ø _SG
ø₁
ø₂
ø_R
DS
OS
(2) Drive timing
tSr
ø_SG
ø₁
tSs
tSW
Integration Time (Tint.)
1 2 3 4 6 7 8 9 10 11 58 59 60 61 62 63 64 65 66 2222 2224 2226
2223 2225
1 2 34
6 7 8 _{B1 B2 B50 B51 B52}
Blank feed
(for 8 pixels)
2159
D₁ D₂ D₃
Black reference
R₁ G₁ B₁
2160D_{4 D5 D6}
pixel signal
Valid pixel signal
(for 52 pixels)
(for 2160 pixels)
Note) Repeat the transfer
pulses (cp) for
more than 1114
periods.
tSf
90%
10%
90%
t_Sh
Invalid pixel signal
(for 3 pixels)
Invalid pixel signal
(for 3 pixels)
90%
ø₁
10%
tCr
tCf
90%
ø₂
50%
10%
tRS
90%
t Rh
ø_R
50%
10%
tRr ^tRW
tRf
DS
t OS
T
OS
90%
Reference level
Signal output voltage