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PDF ILX538K Data sheet ( Hoja de datos )

Número de pieza ILX538K
Descripción 2-Line Color CCD Linear Sensor with a 1-Line Spacing
Fabricantes ETC 
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No Preview Available ! ILX538K Hoja de datos, Descripción, Manual

2-Line Color CCD Linear Sensor
with a 1-Line Spacing
ILX538K
Along with the current rapid growth in the personal computer
market, the color image scanner is poised for rapid growth.
Although Sony has already developed a line of products for
color image scanners, we have now developed a new product
to support A4-size documents at a deusity of 600 DPI : the
ILX538K 2-line color linear sensor with a 1-line spacing.
s 2-line color linear sensor consisting of an
R and B dot-sequential line and a G line
s Pixel line spacing of 1 line
s Analog memory included in the CCD
block.
s Pixel size corresponding to a 7-µm pitch
s Ultra-low lag
s Excellent linearity
s Built-in clamp circuit
s Built-in sample-and-hold circuit
2-Line Color Linear Sensor
Consisting of an R and B
Dot-sequential Line and a
G Line
Figure 1 shows the block diagram for a
3-line sensor and figure 2 shows the
block diagram of the ILX538K sensor
block. In 3-line sensors, the pixel lines
are usually separated by a spacing of
several pixel widths. Application
systems normally compensate for this
by providing external memory and
performing interline interpolation as
synchronization processing. The
ILX538K consists of 2 lines, a dot-
sequential R and B line and a G line and
succeeds in reducing the interline spac-
ing to just 1 line.
VOICE
Of the 600 DPI color linear sensors
developed to date, the ILX538K
best provides the three critical
sensor aspects; namely a small
pixel size, ease of use, and a nar-
row line spacing. I’m sure that this
device will be well received in the
color image scanner market as the
indispensable key device for driv-
ing further expansion of that mar-
ket. Once you have been intro-
duced to this product, you will find
it truly indispensable.
Analog Memory for Line
Synchronization Provided
in the CCD Block
The ILX538K includes one line of
analog memory for each of the R/B and
G sensor lines and the CCD registers. It
is possible to perform line data
synchronization for the 2-sensor lines
using this memory. This makes
external correction (line data synchro-
nization) memory unnecessary, and can
significantly simplify the peripheral
circuits. Since this analog memory is
provided for both the R/B and G lines,
line data synchronization can be per-
formed for scanning in either direction,
thus provide a high degree of freedom
in end product design.
Pixel Size Corresponding
to a 7-µm Pitch
Figure 3 shows the block diagram of the
ILX538K. One of the sensor lines is an
R/B dot-sequential lines and the other
is the G line. This structure allows the
ILX538K to achieve a minimum line
spacing of 1 line (7 µm), which is equal
to the pixel spacing. Table 1 presents
an overview of the characteristics of the
ILX538K. The effective pixel size is
5×6 µm (for a 7 µm pitch), and the
ILX538K achieves the high pixel counts
of 2670 effective pixels for the R and B
lines and 5340 for the G line.
Excellent Linearity
Table 2 lists the electro-optical charac-
teristics of the ILX538K. Since the
sensor block signal charges are fully
read out, there is no lag. Also, the
ILX538K provides excellent linearity
from small signals through the satura-
tion output voltage.
Built-in Clamp and
Sample-and-Hold Circuits
The ILX538K includes both clamp and
sample-and-hold circuits for all signal
outputs. Also, the ILX538K provides
two independent parallel sample-and-
hold circuits for the R/B dot-sequential
output circuits, so that the R and B sig-
nals can be output separately to
individual output pins.

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