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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
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.
a
AD9806
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2001
Complete 10-Bit 18 MSPS
CCD Signal Processor
FUNCTIONAL BLOCK DIAGRAM
PGA
0dB
~34dB
0dB
~15dB
CLAMP
3
REF
10-BIT
DAC
INTF
AD9806
10
PBLK
CLPOB
3-W INTF
ADCIN AUXIN
SHP
SHD ADCCLK
DOUT
VRT
VRB
CCDIN
DAC1
DAC2
CLPDM
TIMING
GENERATOR
MUX
S/H
CDS
ADC
8-BIT
DAC
8-BIT
DAC
AUXMID
–4
~14dB
PGA
CLAMP
FEATURES
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
3 V Single Supply Operation
Low Power: 65 mW @ 2.7 V Supply
48-Lead LQFP Package
APPLICATIONS
Camcorders (8 mm and DVC)
Digital Still Cameras
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.
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.
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.