AD9845AJST

更新时间： 2024-01-16 09:24:00

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
22页	250K
描述
Complete 12-Bit 30 MSPS CCD Signal Processor

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AD9845AJST 数据手册

Complete 12-Bit 30 MSPS

CCD Signal Processor

AD9845A

PRODUCT DESCRIPTION

FEATURES

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.

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

12-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: 140 mW @ 3 V Supply

48-Lead LQFP Package

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.

APPLICATIONS

Digital Still Cameras

Digital Video Camcorders

Industrial Imaging

The AD9845A operates from a single 3 V power supply, typi-

cally dissipates 140 mW, and is packaged in a 48-lead LQFP.

FUNCTIONAL BLOCK DIAGRAM

PBLK

AVDD

AVSS

CLPOB

CLP

COLOR

STEERING

DRVDD

DRVSS

4dB ꢀ 6dB

2dB~36dB

VGA

CDS

PxGA

CCDIN

2:1

MUX

ADC

DOUT

CLP

VRT

VRB

BANDGAP

REFERENCE

CLPDM

AUX1IN

OFFSET

DAC

2:1

MUX

BUF

INTERNAL

BIAS

CML

AUX2IN

CONTROL

REGISTERS

CLP

DVDD

DVSS

DIGITAL

INTERFACE

INTERNAL

TIMING

AD9845A

SHP

SHD DATACLK

SCK

SDATA

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

which 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: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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