XRD9855 datasheet, PDF - EEWORLD Datasheet

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XRD9855: DescriptionCCD Image Digitizers with CDS, PGA and 10-Bit A/D; File Size686KB，35 Pages; ManufacturerExar [Exar Corporation]

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XRD9855 Overview

CCD Image Digitizers with CDS, PGA and 10-Bit A/D

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XRD9855/9856

XRD98L55/98L56

CCD Image Digitizers with

CDS, PGA and 10-Bit A/D

July 2001

FEATURES

10-Bit Resolution ADC

18 - 27MHz Maximum Sampling Rate

Correlated Double Sampling (CDS)

Programmable Gain from 6dB to 38dB (PGA)

Digitally Controlled Analog Offset-Calibration

CCD Black Level Offset Compensation at Frame

Rate

CDS Clocks Sample Rising Edge or Falling Edge

Single 5V or 3V Power Supply

Low Power for Battery Applications:

XRD9855/56:

XRD98L55/L56:

250/

300m W @ V

= 5.0V

3-State Digital Outputs

ESD Protection to Over 2000V

APPLICATIONS

Digital Video Camcorders

Digital Still Cameras

PC Video Teleconferencing

Digital Copiers

Infrared Image Digitizers

CCD/CIS Imager Interface

CCTV/Security Camera

2D Bar Code Readers

Industrial Cameras

120/150mW @ V

= 3.0V

A-Typ Current in Stand By Mode

GENERAL DESCRIPTION

The XRD9855/XRD9856 are complete CCD Image

Digitizers for digital cameras. The products include a

high bandwidth differential Correlated Double Sampler

(CDS), 8-bit digitally Programmable Gain Amplifier

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

digital controlled black level auto-calibration circuitry.

The C or el ed D oubl Sam pl ( D S ) subt act t

r at

er C

r s he

C C D out

put si

gnal bl

ack l

evel fom t vi

he deo l

evel

C om m on m ode si

gnal se and pow ersuppl noi ar

noi

y se e

r ect by t dif ental D S i

ej ed

he fer i C

nputst

age.C D S i

nput

ar desi

gned t be used eiher dif entalor si e-

fer i

ngl

ended.

The aut calbr i cicui com pensat f any i er

i aton r t

es or

nt -

nalofsetoft X R D 9855/ R D 9856 as w el as bl

ack

evelofsetf om t C C D .

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.

The PGA and black level auto-calibration are controlled

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.

The XRD9855/XRD9856 has direct access to the PGA

output and ADC input through the pin TESTVIN.

The XRD9855/XRD9856 are packaged in 48-lead sur-

face mount TQFP to reduce space and weight, and

suitable for hand-held and portable applications.

ORDERING INFORMATION

Part No.

XRD9855AIV

XRD98L55AIV

XRD9856AIV

XRD98L56AIV

Package

48 Lead TQFP (7 x 7 x 1.4 mm)

Operating

Temperature Range Power Supply

-40°C to 85°C

5.0V

3.0V

5.0V

3.0V

Maximum

Sampling Rate

18 MSPS

27 MSPS

Rev. 1.01

EXAR

Corporation, 48720 Kato Road, Fremont, CA 94538

•

(510) 668-7000

•

FAX (510) 668-7017

•

www.exar.com

XRD9855 Related Products

	XRD9855	XRD9855AIV	XRD9856	XRD9856AIV	XRD98L55	XRD98L55AIV	XRD98L56	XRD98L56AIV
Description	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D	CCD Image Digitizers with CDS, PGA and 10-Bit A/D

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