Datasheet > XRD9856

XRD9856

更新时间： 2024-11-06 22:34:47

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
35页	683K
描述
CCD Image Digitizers with CDS, PGA and 10-Bit A/D

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XRD9856 数据手册

XRD9855/9856

XRD98L55/98L56

CCD Image Digitizers with

CDS, PGA and 10-Bit A/D

July 2001

FEATURES

l 3-State Digital Outputs

l 10-Bit Resolution ADC

l ESD Protection to Over 2000V

l 18 - 27MHz Maximum Sampling Rate

l CorrelatedDoubleSampling(CDS)

l Programmable Gain from 6dB to 38dB (PGA)

l DigitallyControlledAnalogOffset-Calibration

l CCD Black Level Offset Compensation at Frame

Rate

APPLICATIONS

l DigitalVideoCamcorders

l Digital Still Cameras

l PC Video Teleconferencing

l DigitalCopiers

l CDS Clocks Sample Rising Edge or Falling Edge

l Single 5V or 3V Power Supply

l Infrared Image Digitizers

l CCD/CISImagerInterface

l CCTV/SecurityCamera

l 2D Bar Code Readers

l IndustrialCameras

l Low Power for Battery Applications:

XRD9855/56:

250/300mW @ V _DD= 5.0V

XRD98L55/L56: 120/150mW @ V_DD= 3.0V

l 50mA-Typ Current in Stand By Mode

GENERALDESCRIPTION

The XRD9855/XRD9856 are complete CCD Image

Digitizers for digital cameras. The products include a

highbandwidthdifferentialCorrelatedDoubleSampler

(CDS), 8-bit digitally Programmable Gain Amplifier

(PGA), 10-bit Analog-to-Digital Converter (ADC) and

digital controlled black level auto-calibration circuitry.

The PGA is digitally controlled with 8-bit resolution on

a linear dB scale, resulting in a gain range of 6dB to

38dB with 0.125dB per LSB of the gain code.

ThePGAandblacklevelauto-calibrationarecontrolled

through a simple 3-wire serial interface. The timing

circuitry is designed to enable users to select a wide

variety of available CCD and image sensors for their

applications.

TheCorrelatedDoubleSampler(CDS)subtractsthe

CCD output signal black level from the video level.

Commonmodesignalnoiseandpowersupplynoiseare

rejectedbythedifferentialCDSinputstage.CDSinputs

aredesigned to be used eitherdifferential orsingle-

ended.

TheXRD9855/XRD9856hasdirectaccesstothePGA

output and ADC input through the pin TESTVIN.

TheXRD9855/XRD9856arepackagedin48-leadsur-

face mount TQFP to reduce space and weight, and

suitable for hand-held and portable applications.

Theautocalibrationcircuitcompensatesforanyinter-

naloffsetoftheXRD9855/XRD9856aswellasblack

leveloffsetfrom theCCD.

ORDERINGINFORMATION

Operating

Maximum

Part No.

Package

Temperature Range PowerSupply Sampling Rate

XRD9855AIV

48 Lead TQFP (7 x 7 x 1.4 mm)

-40°C to 85°C

5.0V

3.0V

5.0V

3.0V

18 MSPS

27 MSPS

XRD98L55AIV 48 Lead TQFP (7 x 7 x 1.4 mm)

XRD9856AIV 48 Lead TQFP (7 x 7 x 1.4 mm)

XRD98L56AIV 48 Lead TQFP (7 x 7 x 1.4 mm)

Rev. 1.01

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 · (510) 668-7000 · FAX (510) 668-7017 · www.exar.com

12 3 4 5 6 7...35

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与XRD9856相关器件

型号	品牌	获取价格	描述	数据表
XRD9856AIV	EXAR	获取价格	CCD Image Digitizers with CDS, PGA and 10-Bit A/D
XRD9859AIU	EXAR	获取价格	Consumer Circuit, PDSO28, 5.30 MM, SSOP-28
XRD9859CAMAD9803EVAL	EXAR	获取价格	Analog Circuit
XRD9859CAMAD9843EVAL	EXAR	获取价格	Analog Circuit
XRD9861CAMAD9803EVAL	EXAR	获取价格	Analog Circuit
XRD9861CAMAD9843EVAL	EXAR	获取价格	Analog Circuit
XRD9861CAMVSP2212EVAL	EXAR	获取价格	Analog Circuit
XRD98L23	EXAR	获取价格	8-Bit, High-speed Linear CIS/CCD Sensor Signal Processor with Serial Control
XRD98L23ACD	EXAR	获取价格	8-Bit, High-speed Linear CIS/CCD Sensor Signal Processor with Serial Control
XRD98L23ACD-F	EXAR	获取价格	暂无描述

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