ILX538K ETC, ILX538K Datasheet

ILX538K

Manufacturer Part Number

ILX538K

Description

Manufacturer

ETC

Datasheet

1.ILX538K.pdf (2 pages)

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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.

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.

2-Line Color CCD Linear Sensor

with a 1-Line Spacing

ILX538K

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.

2-Line Color Linear Sensor

Consisting of an R and B

Dot-sequential Line and a

G Line

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.

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 m), 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 m (for a 7 m 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.

to a 7- m Pitch

Analog Memory for Line

Synchronization Provided

in the CCD Block

Pixel Size Corresponding

2-line color linear sensor consisting of an

R and B dot-sequential line and a G line

Pixel line spacing of 1 line

Analog memory included in the CCD

block.

Pixel size corresponding to a 7- m pitch

Ultra-low lag

Excellent linearity

Built-in clamp circuit

Built-in sample-and-hold circuit

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.

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.

Excellent Linearity

Built-in Clamp and

Sample-and-Hold Circuits

Related parts for ILX538K

ILX538K Summary of contents

Page 1

... 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. 2-Line Color Linear Sensor Consisting and B Dot-sequential Line and a ...

Page 2

... CCD analog shift register Figure 1 Block Diagram of the Sensor Block in a 3-Line Sensor CCD analog shift register 1-line delay analog memory Readout gates - - - Readout gates 1-line delay analog memory CCD analog shift register Figure 2 Block Diagram of ILX538K Sensor Block bias circuit ...

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