LUPA-1300(2007) View Datasheet(PDF) - Cypress Semiconductor
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LUPA-1300 Datasheet PDF : 32 Pages
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LUPA-1300
Sensor architecture
The image sensor consists of the pixel array, the column
readout electronics, X-and Y addressing, on chip drivers, the
output amplifiers and some logic
Figure 3. Architecture of the LUPA sensor.
Imager core
Drivers for the pixel array signals
Sensor
Control signals
Pixel
Y-addressing
Pixel core
Column amplifiers
Analog multiplexer
X-addressing
16
15
14
Output
amplifiers
3
2
1
System clock
40 MHz
SPI interface
Figure 3 shows a schematic representation of the image
sensor on which the different modules are displayed.
The image core is a pixel array of 1280 * 1024 pixels each of
14 *14 ยตm2 in size. The readout is from bottom left to top right.
To obtain a frame rate of 450 frames/sec for this resolution, 16
output amplifiers each capable of driving an output capaci-
tance of 10 pF at 40 MHz are placed on the image sensor.
The column readout amplifiers bring the pixel data to the
output amplifiers. The logic and the x- and y addressing
controls the image sensor so that progressive scan and
windowing is possible. Extra pixel array drivers are foreseen
at the top of the image sensor to control the global pixel array
signals.
maximum fill factor. A schematic representation of the pixel is
given in Figure 4
Figure 4. Schematic representation of the synchronous
pixel as used in the LUPA design
Vpix
reset
sample
Row
select
Pixel architecture
precharge Mem
The active pixels allow synchronous shutter i.e. all pixels are
illuminated during the same integration time, starting from the
same moment in time. After a certain integration time, the
pixels are readout sequentially. Readout and integration are in
parallel, which means that when the image sensor is readout,
the integration time for the next frame is ongoing. This feature
requires a memory element inside the pixel, which affects the
Note
6. The signals mentioned in Figure 4 are the internal signals, generated by the internal drivers, required to have the synchronous shutter feature
Document Number: 38-05711 Rev. *C
Page 8 of 32
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