KAI-08050 datasheet(3/31 Pages) ONSEMI

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KAI−08050

www.onsemi.com

DEVICE DESCRIPTION

Architecture

Figure 2. Block Diagram

HLOD

12 Dark

V1B

12 Buffer

1 Dummy

3296H x 2472V

5.5 mm x 5.5 mm Pixels

1648

(Last VCCD Phase = V1 → H1S)

V2B

V3B

V4B

V1T

V2T

V3T

V4T

RDa

VDDa

VOUTa

GND

RDc

VDDc

VOUTc

GND

RDd

VDDd

VOUTd

GND

RDb

VDDb

VOUTb

GND

V1B

V2B

V3B

V4B

V1T

V2T

V3T

V4T

H2SLa

OGa

H2SLc

OGc

H2SLd

OGd

H2SLb

OGb

ESD

8 22 10 1

8 22

22 12

DevID

HLOD

10 1

Dark Reference Pixels

There are 12 dark reference rows at the top and 12 dark

rows at the bottom of the image sensor. The dark rows are not

entirely dark and so should not be used for a dark reference

level. Use the 22 dark columns on the left or right side of the

image sensor as a dark reference.

Under normal circumstances use only the center 20

columns of the 22 column dark reference due to potential

light leakage.

Dummy Pixels

Within each horizontal shift register there are 11 leading

additional shift phases. These pixels are designated as

dummy pixels and should not be used to determine a dark

reference level.

In addition, there is one dummy row of pixels at the top

and bottom of the image.

Active Buffer Pixels

12 unshielded pixels adjacent to any leading or trailing

dark reference regions are classified as active buffer pixels.

These pixels are light sensitive but are not tested for defects

and non−uniformities.

Image Acquisitio

An electronic representation of an image is formed when

incident photons falling on the sensor plane create

electron−hole pairs within the individual silicon

photodiodes. These photoelectrons are collected locally by

the formation of potential wells at each photosite. Below

photodiode saturation, the number of photoelectrons

collected at each pixel is linearly dependent upon light level

and exposure time and non−linearly dependent on

wavelength. When the photodiodes charge capacity is

reached, excess electrons are discharged into the substrate to

prevent blooming.

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