AD9803_15 Datasheet, PDF (1/19 Pages) Analog Devices – CCD SIGNAL PROCESSOR FOR ELECTRONIC CAMERAS

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FEATURES
3-Wire Serial I/F for Digital Control
18 MHz Correlated Double Sampler
Low Noise PGA with 0 dB–30 dB Range
Analog Pre-Blanking Function
AUX Input with Input Clamp and PGA
10-Bit 18 MSPS A/D Converter
Direct ADC Input with Input Clamp
Internal Voltage Reference
Two Auxiliary 8-Bit DACs
+3 V Single Supply Operation
Low Power: 150 mW at 2.7 V Supply
48-Lead LQFP Package
CCD Signal Processor
for Electronic Cameras
AD9803
PRODUCT DESCRIPTION
The AD9803 is a complete CCD and video signal processor
developed for electronic cameras. It is well suited for video
camera and still-camera applications.
The 18 MHz CCD signal processing chain consists of a CDS,
low noise PGA, and 10-bit ADC. Required clamping circuitry
and a voltage reference are also provided. The AUX input
features a wideband PGA and input clamp, and can be used to
sample analog video signals.
The AD9803 nominally operates from a single 3 V power sup-
ply, typically dissipating 170 mW. The AD9803 is packaged in a
space-saving 48-lead LQFP and is specified over an operating
temperature range of –20°C to +70°C.
CCDIN
CLPDM
DAC1
DAC2
FUNCTIONAL BLOCK DIAGRAM
PBLK
PGACONT1-2 CLPOB
CDS
CLAMP
0–30dB
PGA
MUX S/H
AD9803
10
ADC
DOUT
CLAMP
8-BIT
DAC
8-BIT
DAC
10-BIT
DAC
INTF
3
0–10dB
PGA
CLAMP
REF
TIMING
GENERATOR
AUXCONT
VRT
VRB
3-W INTF ADCIN AUXIN ACLP SHP SHD ADCCLK
REV. 0
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© Analog Devices, Inc., 1999