AD9804 Datasheet, PDF (1/8 Pages) Analog Devices – Complete 10-Bit 18 MSPS CCD Signal Processor

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FEATURES
18 MSPS Correlated Double Sampler (CDS)
6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA)
Low Noise Clamp Circuits
Preblanking Function
10-Bit 18 MSPS A/D Converter
3-Wire Serial Digital Interface
3 V Single Supply Operation
Low Power CMOS
48-Lead LQFP Package
APPLICATIONS
PC Cameras
Digital Still Cameras
PRODUCT DESCRIPTION
The AD9804 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 AD9804’s signal chain
consists of an input clamp, correlated double sampler (CDS),
digitally controlled VGA, black level clamp, and a 10-bit A/D
converter. The internal VGA gain register is programmed through
a 3-wire serial digital interface.
Complete 10-Bit 18 MSPS
CCD Signal Processor
AD9804
FUNCTIONAL BLOCK DIAGRAM
PBLK AVDD AVSS
CLPOB
CCDIN
CDS
6dB TO 40dB
VGA
CLP
10-BIT
ADC
DRVDD
DRVSS
10
DOUT
CLPDM
CLP
10
VGA GAIN
REGISTER
AD9804
DIGITAL
INTERFACE
BANDGAP
REFERENCE
INTERNAL
BIAS
INTERNAL
TIMING
VR
VTRB
CML
DVDD
DVSS
SL SCK SDATA SHP SHD DATACLK
REV. 0
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© Analog Devices, Inc., 2000