CYII4SM1300AA Datasheet, PDF (3/35 Pages) Cypress Semiconductor – IBIS4-1300 1.3 MPxl Rolling Shutter CMOS Image Sensor

CYII4SM1300AA
Image Sensor Core – Focal Plane Array
The core of the sensor is the pixel array with 1280 x 1024 (SXGA)
active pixels. The name 'active pixels' refers to the amplifying
element in each pixel.
This type of pixels offer a high light sensitivity combined with low
temporal noise. The actual array size is 1286 x 1030 including
the 6 dummy pixels in X and Y. Although the dummy pixels fall
outside the SXGA format, their information can be used e.g. for
color filter array interpolation.
Figure 2. Pixel Selection – Principle
X shift register
Next to the pixel array there are two Y shift registers, and one X
shift register with the column amplifiers. The shift registers act as
pointers to a certain row or column. The Y readout shift register
accesses the row (line) of pixels that is currently readout. The X
shift register selects a particular pixel of this row. The second Y
shift register is used to point at the row of pixels that is reset. The
delay between both Y row pointers determines the integration
time -thus realizing the electronic shutter.
A clock and a synchronization pulse control the shift registers.
On every clock pulse, the pointer shifts one row/column further.
Table 1. Optical and Electrical Characteristics
Pixel Characteristics
Pixel structure
Photodiode
Pixel size
Resolution
Pixel rate with on-chip ADC
Frame rate with on-chip ADC
Frame rate with analog output
A sync pulse is used to reset and initialize the shift registers to
their first position.
The smart column amplifiers compensate the offset variations
between individual pixels. To do so, they need a specific pulse
pattern on specific control signals before the start of the row
readout.
Table 1. summarizes the optical and electrical characteristics of
the image sensor. Some specifications are influenced by the
output amplifier gain setting (e.g., temporal noise, conversion
factor,...). Therefore, all specifications are referred to an output
amplifier gain equal to 1.
3-transistor active pixel
High fill factor photodiode
7 x 7 μm²
1286 x 1030 pixels
SXGA plus 6 dummy rows and columns
Nominal 10 MHz (Note 1) (Note 2)
About 7 full frames/s at nominal speed
Up to 23 full frames per second (see table1.1)
Document Number: 38-05707 Rev. *C
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