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AD9945KCPRL

更新时间： 2024-01-14 00:50:26

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	191K
描述
Complete 12-Bit 40 MHz CCD Signal Processor

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AD9945KCPRL 数据手册

Complete 12-Bit 40 MHz

CCD Signal Processor

AD9945

FEATURES

GENERAL DESCRIPTION

40 MSPS Correlated Double Sampler (CDS)

6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA)

Low Noise Optical Black Clamp Circuit

Preblanking Function

12-Bit 40 MSPS A/D Converter

No Missing Codes Guaranteed

3-Wire Serial Digital Interface

3 V Single-Supply Operation

The AD9945 is a complete analog signal processor for CCD

applications. It features a 40 MHz single-channel architecture

designed to sample and condition the outputs of interlaced and

progressive scan area CCD arrays. The AD9945’s signal chain

consists of a correlated double sampler (CDS), a digitally con-

trolled variable gain amplifier (VGA), a black level clamp, and a

12-bit A/D converter.

The internal registers are programmed through a 3-wire serial digital

interface. Programmable features include gain adjustment, black

level adjustment, input clock polarity, and power-down modes.

Low Power: 140 mW @ 3 V Supply

Space-Saving 32-Lead 5 mm

ꢀ 5 mm LFCSP

APPLICATIONS

The AD9945 operates from a single 3 V power supply, typi-

cally dissipates 140 mW, and is packaged in a space-saving

32-lead LFCSP.

Digital Still Cameras

Digital Video Camcorders

PC Cameras

Portable CCD Imaging Devices

CCTV Cameras

FUNCTIONAL BLOCK DIAGRAM

REFT REFB

PBLK

AD9945

DRVDD

DRVSS

BAND GAP

REFERENCE

6dB TO 40dB

VGA

12-BIT

ADC

DOUT

CDS

CCDIN

CLP

AVDD

AVSS

CLPOB

CONTROL

REGISTERS

DVDD

DVSS

DIGITAL

INTERFACE

INTERNAL

TIMING

SHP

SHD DATACLK

SCK

SDATA

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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