AD9845 Analog Devices, AD9845 Datasheet
AD9845
Manufacturer Part Number
AD9845
Description
Complete 12-Bit 30 MSPS CCD Signal Processor
Manufacturer
Analog Devices
Datasheet
1.AD9845.pdf
(22 pages)
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a
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.
PxGA is a registered trademark of Analog Devices, Inc.
REV. 0
AUX1IN
AUX2IN
CLPDM
CCDIN
PBLK
CLP
AD9845A
CDS
CLP
MUX
2:1
AVDD
4dB
PxGA
FUNCTIONAL BLOCK DIAGRAM
6dB
BUF
6
AVSS
SL
HD
STEERING
MUX
2:1
COLOR
INTERFACE
REGISTERS
CONTROL
DIGITAL
SCK
VD
PRODUCT DESCRIPTION
The AD9845A 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 AD9845A’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 12-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
adjustment, black level adjustment, input configuration, and
power-down modes.
The AD9845A operates from a single 3 V power supply, typi-
cally dissipates 140 mW, and is packaged in a 48-lead LQFP.
VGA
2dB~36dB
SDATA
10
OFFSET
DAC
Complete 12-Bit 30 MSPS
8
SHP
CLPOB
CCD Signal Processor
CLP
ADC
INTERNAL
REFERENCE
INTERNAL
BANDGAP
TIMING
SHD
BIAS
DATACLK
12
DRVDD
DRVSS
DOUT
VRT
VRB
CML
DVDD
DVSS
AD9845A
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