|| * Diagonal 4.5 mm (Type 1/4)
* ICX642AKA: NTSC, 250K-effective pixels
ICX643AKA: PAL, 290K-effective pixels
* High sensitivity (+6 dB over existing Sony
New spectral sensitivity characteristics
* Low supply voltage support:
VDD = 12 V, VL = -5 V
* Pin compatible with existing Sony products
||The ICX642AKA and ICX643AKA are
products mainly designed for security
camera, interphone and similar applications
and are diagonal 4.5 mm (Type 1/4)
250K/290K-pixel color CCDs.
These products provide improved characteristics
compared to the existing
ICX226AK and ICX227AK.
These new devices provide significant improvements
in the sensitivity characteristics,
which are critical for security camera
applications, while maintaining the
same smear level characteristics as the existing
Furthermore the saturation signal levels in
both the ICX642AKA and ICX643AKA
were improved by 1000 mV as compared
to the existing products (ICX226AK: 900
mV, ICX227AK: 810 mV).
| High Sensitivity and New
||The ICX642AKA and ICX643AKA of
this release provide a significantly improved
condensing efficiencies by improvements
to the upper section structure
and photodiode structure. Also, by adopting
new complementary color pigments in
the color filters, Sony increased the sensitivity
to the blue end of the spectrum
(shorter wavelengths) and achieved well-balanced
spectral sensitivity characteristics.
(See figure 1.)
The combination of these technological
improvements results in a significant increase
in the sensitivity characteristics that
totals +6 dB. When one compares actual
images, one can clearly see that the sensitivity
has been improved significantly.
(See photograph 1.)
Note that the adoption of these new color
filters also results in a significant improvement
in light resistance compared to the
existing products (the ICX226AK and
ICX227AK). This means that fading of the
color filters when exposed to strong light
for long periods is less likely to occur,
making these devices appropriate for
applications such as interphones used outside.
| Compatibility with Existing
||In these new products, Sony has achieved
compatibility by making the image size,
pixel count, drive timing, package, and pin
configuration the same as the existing
products (the ICX226AK and ICX227AK).
These devices also feature a 12 V supply
voltage and a -5 V vertical clock bias, and
have a power consumption of approximately
65 mW, which is equivalent to that
of the existing products.
||In developing this device, we focused
on the sensor sensitivity,
which is seen as one of the most
important characteristics for security
cameras. As a result of the
product team working together
and striving for improvements
from a variety of standpoints, we
were able to achieve characteristics
that we were satisfied with.
I strongly suggest that you look
into this product.
all articles with figures and tables.