XRD9825 Datasheet, PDF (19/33 Pages) Exar Corporation – 16-Bit Linear CIS/CCD Sensor Signal Processor with Serial Control

XRD9825
AREA
or
RED
LINEAR
N/C
M
CCD
N/C
U
N/C
X
CLAMP
XRD9825
VDD
VRT
RL
VRB
Figure 13. CCD AC Coupled Application
Area or Linear CCD Applications
Figure 13 is a block diagram for applications with Area
or Linear CCDs (The timing for Area CCDs and B/W
CCDs is the same). For Area or Linear CCD applica-
tions, a global offset is loaded into the serial port at the
beginning of a line. The gain is set to adjust for the
highest color intensity of the CCD output. Once the
pixel values have been sampled, the gain and offset are
adjusted at the beginning of the next line. For example,
if there is a line-to-line variation between the black
reference pixels, the offset is adjusted. The gain is
always adjusted for the highest color intensity.
Rev. 1.00
19