AD9846A Datasheet, PDF (1/24 Pages) Analog Devices – Complete 10-Bit 30 MSPS CCD Signal Processor

a
FEATURES
30 MSPS Correlated Double Sampler (CDS)
4 dB ؎ 6 dB 6-Bit Pixel Gain Amplifier (PxGA^®)
2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA)
Low Noise Clamp Circuits
Analog Preblanking Function
10-Bit 30 MSPS A/D Converter
Auxiliary Inputs with VGA and Input Clamp
3-Wire Serial Digital Interface
3 V Single Supply Operation
Low Power: 100 mW @ 2.7 V
48-Lead LQFP Package
APPLICATIONS
Digital Still Cameras
Digital Video Camcorders
Industrial Imaging
Complete 10-Bit 30 MSPS
CCD Signal Processor
AD9846A
PRODUCT DESCRIPTION
The AD9846A is a complete analog signal processor for CCD
applications. It features a 30 MHz single-channel architecture
designed to sample and condition the outputs of interlaced and
progressive scan area CCD arrays. The AD9846A’s signal chain
consists of an input clamp, correlated double sampler (CDS),
Pixel Gain Amplifier (PxGA), digitally controlled variable gain
amplifier (VGA), black level clamp, and a 10-bit A/D con-
verter. 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
adjustment, black level adjustment, input configuration, and
power-down modes.
The AD9846A operates from a single 3 V power supply, typi-
cally dissipates 117 mW, and is packaged in a 48-lead LQFP.
CCDIN
CLPDM
AUX1IN
AUX2IN
PBLK
FUNCTIONAL BLOCK DIAGRAM
AVDD
AVSS
HD
VD
CLPOB
4dB؎6 dB
CDS
PxGA
CLP
6
2:1
MUX
BUF
CLP
AD9846A
COLOR
STEERING
2:1
MUX
2dB~36dB
VGA
OFFSET
10
DAC
8
CONTROL
REGISTERS
DIGITAL
INTERFACE
CLP
DRVDD
DRVSS
ADC
DOUT
10
BANDGAP
REFERENCE
VRT
VRB
INTERNAL
BIAS
CML
INTERNAL
TIMING
DVDD
DVSS
SL
SCK SDATA
SHP SHD DATACLK
PxGA is a registered trademark of Analog Devices, Inc.
REV. 0
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
www.analog.com
Fax: [phone]
© Analog Devices, Inc., 2001