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AD9843A
0.8V
INPUT SIGNAL
0.4V
VIDEO
SIGNAL
MSB
D10
D9
D8
X
0
X
1
0
1
1
V-DRIVE
0.4V
??V
5k
0.1 F
AUX1IN
0.4V
BUFFER
AUX2IN
0.1 F
VIDEO CLAMP
CIRCUIT
LPF
Table VIII. VGA Gain Register Used for AUX2-Mode
D7
D6
D5
X
X
X
0
0
0
•
•
•
1
1
1
CCD
V
OUT
0.1 F
BUFFER
CCD
TIMING
0dB TO 36dB
VGA
ADC
10
VGA GAIN
REGISTER
VGA GAIN
REGISTER
9
0dB TO 18dB
VGA
ADC
8
CLAMP LEVEL
REGISTER
D4
D3
D2
X
X
X
0
0
0
1
1
1
AD9843A
DIGITAL
OUTPUTS
ADC
OUT
SERIAL
CCDIN
INTERFACE
REGISTER
DATA
CDS/CLAMP
TIMING
TIMING
GENERATOR
MIDSCALE
CLAMP LEVEL
LSB
D1
D0
Gain (dB)
X
X
0.0
0
0
0.0
•
•
•
1
1
18.0
DIGITAL IMAGE
PROCESSING
ASIC
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