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AD9843A
–14–
REV. 0
Table VIII. VGA Gain Register Used for AUX2-Mode
MSB LSB
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Gain (dB)
X0 XXXXXXXXX0.0
10000000000.0
••
••
••
111111111118.0
AUX1IN
0.1F
VGA GAIN
REGISTER
ADC
VGA
10
5k⍀
0.4V
0.4V
INPUT SIGNAL
??V
0.8V
0.4V
MIDSCALE
0dB TO 36dB
Figure 14. AUX1 Circuit Configuration
0dB TO 18dB
8
AUX2IN
BUFFER
0.1F
VIDEO
SIGNAL
9
CLAMP LEVEL
LPF
VGA GAIN
REGISTER
ADC
VGA
VIDEO CLAMP
CIRCUIT
CLAMP LEVEL
REGISTER
Figure 15. AUX2 Circuit Configuration
CCD
CCDIN
BUFFER
V
OUT
0.1F
ADC
OUT
REGISTER
DATA
SERIAL
INTERFACE
DIGITAL
OUTPUTS
DIGITAL IMAGE
PROCESSING
ASIC
TIMING
GENERATOR
V-DRIVE
CCD
TIMING
CDS/CLAMP
TIMING
AD9843A
Figure 16. System Applications Diagram