XRD9827 Datasheet, PDF (16/32 Pages) Exar Corporation – 12-Bit Linear CIS/CCD Sensor Signal Processor with Serial Control

XRD9827
Internal CIS Reference Circuit (DB 4 = 1)
The XRD9827 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 XRD9827 for
this mode of operation). Below is a typical application
circuit using the XRD9827 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
DB7/LD
9
8
DB6/SDATA
7
DB5/SCLK
6
DB4
DB3
DB2
5
4
3
DB1
2
DB0
11
ADCCLK
CLAMP ¹²
13
SYNCH
DVDD (3V - 5V)
1
DVDD
DGND
10
XRD9827
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. 1.20
16