Analog Devices AD9843A manual Table VIII. VGA Gain Register Used for AUX2-Mode

AD9843A

0.8V	??V	0.4V
		5k	0dB TO 36dB
	0.1 F	AUX1IN
INPUT SIGNAL
			VGA	ADC	MIDSCALE
0.4V		0.4V	10
			VGA GAIN
			REGISTER

Figure 14. AUX1 Circuit Configuration

VIDEO AUX2IN

SIGNAL

0.1 F

VGA GAIN

REGISTER

9

BUFFER 0dB TO 18dB

VGA	ADC
VIDEO CLAMP	CLAMP LEVEL
CIRCUIT
LPF
8	CLAMP LEVEL
	REGISTER

Figure 15. AUX2 Circuit Configuration

Table VIII. VGA Gain Register Used for AUX2-Mode

	MSB									LSB
D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0	Gain (dB)
X	0	X	X	X	X	X	X	X	X	X	0.0
	1	0	0	0	0	0	0	0	0	0	0.0
					•						•
					•						•
					•						•
	1	1	1	1	1	1	1	1	1	1	18.0

CCD

VOUT

V-DRIVE

AD9843A		DIGITAL
0.1 F	ADCOUT	OUTPUTS
CCDIN		SERIAL
	REGISTER	INTERFACE
	DATA
BUFFER	CDS/CLAMP
	TIMING
CCD
TIMING	TIMING
GENERATOR

DIGITAL IMAGE

PROCESSING

ASIC

Figure 16. System Applications Diagram

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