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AD9944KCPRL PDF预览

AD9944KCPRL

更新时间: 2024-02-13 03:22:58
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 672K
描述
Complete 10-Bit and 12-Bit, 25 MHz CCD Signal Processors

AD9944KCPRL 数据手册

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Complete 10-Bit and 12-Bit, 25 MHz  
CCD Signal Processors  
AD9943/AD9944  
FEATURES  
GENERAL DESCRIPTION  
25 MSPS correlated double sampler (CDS)  
6 dB to 40 dB 10-bit variable gain amplifier (VGA)  
Low noise optical black clamp circuit  
Preblanking function  
10-bit (AD9943), 12-bit (AD9944) 25 MSPS A/D converter  
No missing codes guaranteed  
The AD9943/AD9944 are complete analog signal processors  
for CCD applications. They feature a 25 MHz single-channel  
architecture designed to sample and condition the outputs of  
interlaced and progressive scan area CCD arrays. The signal  
chain for the AD9943/AD9944 consists of a correlated double  
sampler (CDS), a digitally controlled variable gain amplifier  
(VGA), and a black level clamp. The AD9943 offers 10-bit  
ADC resolution, while the AD9944 contains a true 12-bit ADC.  
3-wire serial digital interface  
3 V single-supply operation  
Space-saving 32-lead 5 mm × 5 mm LFCSP package  
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. The AD9943/AD9944 operate from a  
single 3 V power supply, typically dissipate 79 mW, and are  
packaged in space-saving 32-lead LFCSP packages.  
APPLICATIONS  
Digital still cameras  
Digital video camcorders  
PC cameras  
Portable CCD imaging devices  
CCTV cameras  
FUNCTIONAL BLOCK DIAGRAM  
REFT  
REFB  
PBLK  
AD9943/AD9944  
DRVDD  
DRVSS  
BAND GAP  
REFERENCE  
6dB–40dB  
10/12  
10-/12-BIT  
ADC  
CCDIN  
DOUT  
VGA  
CDS  
CLP  
10  
AVDD  
AVSS  
CLPOB  
CONTROL  
REGISTERS  
DVDD  
DVSS  
DIGITAL  
INTERFACE  
INTERNAL  
TIMING  
SL  
SCK  
SDATA  
SHP  
SHD DATACLK  
Figure 1. Functional Block Diagram  
Rev. B  
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.  
Specifications subject to change without notice. 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  
© 2004 Analog Devices, Inc. All rights reserved.  

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