Complete 10-Bit 18 MSPS
CCD Signal Processor
a
AD9806
FEATURES
PRODUCT DESCRIPTION
The AD9806 is a complete analog signal processor for CCD
applications. It features an 18 MHz single-channel architecture
designed to sample and condition the outputs of interlaced and
progressive scan area CCD arrays. The AD9806’s signal chain
consists of an input clamp, correlated double sampler (CDS),
digitally programmable gain amplifier (PGA), black level clamp,
and 10-bit A/D converter. Additional input modes are provided
for processing analog video signals.
Pin-Compatible with Industry Standard AD9803
18 MSPS Correlated Double Sampler (CDS)
Low Noise PGA with 0 dB to 34 dB Gain Range
Low Noise Clamp Circuits
Analog Preblanking Function
10-Bit 18 MSPS A/D Converter
AUX Input with Input Clamp and PGA
Direct ADC Input with Input Clamp
AUXMID Input with PGA
3-Wire Serial Interface for Digital Control
Two Auxiliary 8-Bit DACs
The internal registers are programmed through a 3-wire serial
digital interface. Programmable features include gain adjust-
ment, black level adjustment, input configuration, and power-
down modes.
3 V Single Supply Operation
Low Power: 65 mW @ 2.7 V Supply
48-Lead LQFP Package
The AD9806 operates from a single 3 V power supply, typically
dissipating 75 mW. Packaged in a space-saving 48-lead LQFP,
the AD9806 is specified over an operating temperature range of
–20°C to +85 C.
APPLICATIONS
Camcorders (8 mm and DVC)
Digital Still Cameras
FUNCTIONAL BLOCK DIAGRAM
PBLK
CLPOB
CLAMP
MUX
AD9806
0dB
~
34dB
PGA
CCDIN
CDS
10
ADC
S/H
DOUT
CLAMP
CLPDM
–4~14dB
0dB~15dB
VRT
VRB
PGA
PGA
REF
8-BIT
DAC
10-BIT
DAC
DAC1
DAC2
CLAMP
8-BIT
DAC
INTF
3
TIMING
GENERATOR
3-W INTF ADCIN AUXIN AUXMID
SHP SHD ADCCLK
REV. 0
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use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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Tel: 781/329-4700
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© Analog Devices, Inc., 2001