AD9846A
器件描述：Complete 10-Bit 30 MSPS CCD Signal Processor
器件厂商：AD [Analog Devices]
文件大小：231.12KB，共24页
Sponsor by e络盟器件资料摘要：
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.
a
AD9846A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2001
Complete 10-Bit 30 MSPS
CCD Signal Processor
FUNCTIONAL BLOCK DIAGRAM
DATACLKSHDSHP
BANDGAP
REFERENCE
2:1
MUX
DOUT
AUX2IN
CLPDM
CCDIN
OFFSET
DAC
PBLK
AUX1IN
VRT
VRB
INTERNAL
TIMING
INTERNAL
BIAS
2dB~36dB
AVDD
DVDD
DVSS
AVSS
DRVDD
DRVSS
10
8
CML
DIGITAL
INTERFACE
SDATASCKSL
CLPOB
10
CDS
VGA
CLP
BUF
2:1
MUX
CLP
AD9846A
CONTROL
REGISTERS
CLP
ADC
4dBH115506 dB
COLOR
STEERING
HD VD
PxGA
6
FEATURES
30 MSPS Correlated Double Sampler (CDS)
4 dB H11550 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
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.
PxGA is a registered trademark of Analog Devices, Inc.
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.
a
AD9846A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2001
Complete 10-Bit 30 MSPS
CCD Signal Processor
FUNCTIONAL BLOCK DIAGRAM
DATACLKSHDSHP
BANDGAP
REFERENCE
2:1
MUX
DOUT
AUX2IN
CLPDM
CCDIN
OFFSET
DAC
PBLK
AUX1IN
VRT
VRB
INTERNAL
TIMING
INTERNAL
BIAS
2dB~36dB
AVDD
DVDD
DVSS
AVSS
DRVDD
DRVSS
10
8
CML
DIGITAL
INTERFACE
SDATASCKSL
CLPOB
10
CDS
VGA
CLP
BUF
2:1
MUX
CLP
AD9846A
CONTROL
REGISTERS
CLP
ADC
4dBH115506 dB
COLOR
STEERING
HD VD
PxGA
6
FEATURES
30 MSPS Correlated Double Sampler (CDS)
4 dB H11550 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
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.
PxGA is a registered trademark of Analog Devices, Inc.