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

XRD9825
Internal CIS Reference Circuit (DB 4 = 1)
The XRD9825 has an internal register reserved for
interfacing to the Canon CIS model number CVA-
60216K. When this register is selected, the VDCEXT
(Pin 16) becomes an output voltage of 1.24 volts. This
voltage can be directly connected to the VREF (Pin 5)
of the Canon sensor. This reduces the amount of
components needed for biasing the Canon CIS sensor
(the external diodes and resistors typically used in this
application have been included inside the XRD9825 for
this mode of operation). Below is a typical application
circuit using the XRD9825 and the Canon CVA-60216K
CIS sensor.
N/C
N/C
0.1uF
AVDD
AGND
19
RED
18
GRN
17
BLU
16 _VDCEXT
15
VREF+
20
AVDD
14 _AGND
9
DB7/LD
8
DB6/SDATA
DB5/SCLK
DB4
7
6
5
DB3
4
DB2
DB1
DB0
3
2
11
ADCCLK
CLAMP ¹²
13
SYNCH
DVDD (3V - 5V)
1
DVDD
DGND ¹⁰
XRD9825
DIGITAL
ASIC
DGND
VCC (5V)
DVDD (3V - 5V)
NPN
DGND
NPN
DGND
NPN
DGND
47uF
AGND
0.01uF
100uF
CANON CIS
SENSOR
1 _VOUT
2
MODE
3 _AGND
4 _VCC
5
VREF
6
SP
7 _CLK
8
LED COM
9 _{LED BLU}
10
LED GRN
11 _{LED RED}
12
FGND
DGND
CVA-60216K
Figure 10. Typical Application Circuitry Internal CIS Reference Circuit Mode
CANON CIS Sensor, Model #CVA=60216k
Rev. 1.00
16