IBIS4-6600
Datasheet
Cypress Semiconductor Corporation
3901 North First Street
San Jose, CA 95134
408-943-2600
Contact: info@Fillfactory.com
Document #: 38-05708 Rev.**(Revision 1.3 )
Page 14 of 63
3.2.4 Dark and dummy pixels
Figure 7 shows a plan of the pixel array. The sensor has been designed in “portrait”
orientation. A ring of dummy pixels surrounds the active pixels. Black pixels are
implemented as “optical” black pixels.
Dummy ring of pixels,
surrounding complete pixel
array. not read
Ring of 2 dummy pixels,
illuminated, readable
array of active pixels, read
3002x 2210
Ring of dummy pixels,
covered with black layer,
readable
2222
2210
Figure 7: Floor plan pixel array
3.3 Pixel rate
The pixel rate for this sensor is high enough to support a frame rate of >75 Hz for a
window size of 640 x 480 pixels (VGA format) + 23 pixels over scan in both
directions. Taking into account a row blanking time of 7.2
µs (as baseline, see also
3.9.2.a.7.), this requires a minimum pixel rate of nearly 40 MHz. The final bandwidth
of the column amplifiers, output stage etc. is determined by external bias resistors.
Taken into account a pixel rate of 40 MHz a full frame rate of a little more than 5
frames/s will be obtained.
The frame period of the IBIS4-6600 sensor can be calculated as follows:
=> Frame period = (Nr. Lines * (RBT + pixel period * Nr. Pixels))
with: Nr. Lines: Number of Lines read out each frame (Y).
Nr. Pixels: Number of pixels read out each line (X).
RBT: Row Blanking Time = 7.2
µs (typical).
Pixel period: 1/40 MHz = 25 ns.