ETC ICX488DQF

High-Resolution 4.11M-Pixel Diagonal 6.75 mm (Type 1/2.7) Color CCD
for Consumer Digital Still Cameras Supports 30 frames/s VGA Moving Picture Imaging
ICX488DQ/DQF
The desires for higher resolution and further miniaturization are growing along with the increasingly widespread use of consumer digital
still cameras.
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ICX488DQ: Primary color filters, 24-pin
DIP
ICX488DQF: Primary color filters, 24pin SOP
To respond to these desires, Sony has now developed a new 4.11Mpixel diagonal 6.75 mm (Type 1/2.7) interlaced CCD, the ICX488DQ/
DQF.
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Diagonal 6.75 mm (Type 1/2.7) optical
size and 4.11M effective pixels (2344H
× 1752V)
■
The industry’s smallest pixel size (2.35
µm unit pixel)
■
3-field readout method
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Supports 30 frames/s VGA moving
picture imaging
The ICX488DQ/DQF achieves both higher resolution and miniaturization by achieving the industry’s smallest pixel size of 2.35 µm. Sony’s
unique horizontal and vertical pixel addition technology allows the
ICX488DQ/DQF to provide both 4M-pixel class still picture and VGA
moving picture imaging at 30 frames/s.
The ICX488DQ/DQF is a diagonal 6.75
mm (Type 1/2.7) 4.11M-effective pixel
CCD image sensor developed for use in
high-resolution consumer digital still cameras. Used with a mechanical shutter, the
ICX488DQ/DQF provides high-resolution
image capture. Table 1 presents the pixel
structure used in the ICX488DQ/DQF, and
table 2 presents its imaging characteristics.
The Industry’s Smallest Pixel
Size
Figure 1 presents Sony’s consumer digital still camera CCD lineup. Although the
ICX488DQ/DQF corresponds to an
increased pixel count version of Sony’s
earlier Type 1/2.7 3.24M-pixel
ICX432DQ/DQF, Sony has developed the
industry’s smallest pixel (with a unit pixel
size of 2.35 µm) by adopting the latest fine
fabrication technologies, and thus succeeds in achieving both higher resolution
and miniaturization at the same time. This
allows the implementation of a 4M-pixel
digital still camera from a design using
the ICX432DQ/DQF without changing
the optical system.
High Saturation Signal
V
O
I
C
We developed this 4M-pixel Type
1/2.7 CCD that achieves both a
high pixel count still picture and
high-quality moving picture at the
same time, and also achieves further miniaturization. To respond to
market needs for miniaturization
and higher pixel counts, we took
maximum advantage of Sony’s
fine fabrication technologies and
achieved the industry’s smallest
pixel size. I strongly recommend
that you consider developing new
products based on this device,
which combines both the latest
technologies and functions.
E
To increase the dynamic range, the
ICX488DQ/DQF adopts the same 3-field
readout system used in the ICX432DQ/
DQF. This readout mode allows finer
design rules to be used in the vertical
transfer block, which in turn allows the
photodiode block to be made larger. The
ICX488DQ/DQF achieves a saturation
signal of 385 mV despite miniaturization
to a 2.35 µm unit pixel size. (See table 2.)
VGA Moving Picture Imaging
at 30 frames/s
Since the ICX488DQ/DQF adopts Sony’s
unique horizontal and vertical pixel addition technology, it can add together 4 pixels internally to the CCD itself and thus
achieve a four times higher imaging sensitivity. In the 4/6-line readout mode (with
horizontal addition), the ICX488DQ/DQF
achieves both 30 frames/s high-speed imaging at high resolution (VGA: 640 × 480
pixels). Thus the ICX488DQ/DQF
achieves both high pixel count still picture and high-quality moving picture. It
also features an extensive set of readout
modes, including 2/6-line readout mode
that allows high-speed shutter operation,
and partial scan modes designed for even
higher speed AF control.
System IC
Sony also provides the CXD3629GA
driver timing generator IC that includes
built-in horizontal and vertical drivers. In
addition to a VGA equivalent moving picture mode, this IC also supports high frame
rate readout mode and AF mode as well.
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