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Piranha XL's Physical Pixel Arrangement
Single 5um x 5um
CMOS TDI
Mode
High
Sensitivity
12 Rows
Mid
Sensitivity
8 Rows
Low
Sensitivity
4Rows
16 Reserved
Pixel Columns
To CDS, Analog Gain, Pixel Column Summing & Image Data Transmission Circuits
The CMOS TDI sensor used in the Piranha XL camera is made up of a 16,384 x 12 line array of
5 µm x 5 µm pixels.
Each line of pixels is spaced 5 µm apart to accommodate pixel interface circuitry. 16 pixels at each
edge of the array are reserved for special use by the camera, resulting in 16,352 pixels being
available to the user. By default, 16,384 pixels are output by the camera where the 16 pixels at
each edge are set to 1 DN. The Area of Interest feature (See section Using Area of Interest to
Reduce Image Data & Enhance Performance) can be used to eliminate the 32 edge pixels if desired.
The 12 lines are grouped into three sets of four. The responsivity of the camera can be adjusted by
summing 4, 8, or 12 lines to form the output image data (See Adjusting Responsivity). Forward
and reverse imaging does not cause the optical center to change. Exposure control allows
inspection speed to change without changing responsivity from maximum speed down to the
stopped condition.
The Piranha XL Camera
Pixels Size
16,352 Active Pixel Columns
16,384 x 12 Rows
Pixel Array
Figure 1: Piranha XL Camera CMOS-TDI Pixel Structure
Single 5um Gap
Between Each Active
Row of Pixels
16 Reserved
Pixel Columns
Optical Center
Does Not Move
with Direction
Change
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