XRD9810 查看數據表（PDF） - Exar Corporation

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XRD9810

3-Channel 10/12-Bit Linear CCD & CIS Sensor Signal Processors

Exar Corporation 

XRD9810/12

3-Channel 10/12-Bit Linear CCD & CIS

Sensor Signal Processors

FEATURES

D Single 10/12-Bit 8 MSPS A/D Converter

D Triple-Channel, 2.5 MSPS CCD Color Scan Mode

D Single-Channel, 6 MSPS Monochrome Scan Mode

CCD or CIS

D Triple Correlated Double Sampler

D Triple Programmable Gain Amplifier

D Serial Programming Interface

D Differential or Single Ended Inputs

D CDS for CCD or S/H Mode for CIS Images

August 1999-1

D Inverting or Non-Inverting Mode

D Internal Voltage Reference

D 5V Operation and 3V I/O Compatibility

D Low Power CMOS: 500mW @ 5V

D 32-Pin TQFP Surface Mount Package

APPLICATIONS

D CCD or CIS Color Scanners

D Multifunction Products

D Image Scanners

D Film Scanners

GENERAL DESCRIPTION

The XRD9810/12 is a fully integrated, high-performance

analog signal processor/digitizer specifically designed for

use in 3-channel linear CCD and CIS imaging

applications.

Each channel of the XRD9810/12 includes a Correlated

Double Sampler (CDS), Programmable Gain Amplifier

(PGA) and channel offset adjustment. After gain and

offset adjustment, the analog inputs are sequentially

sampled and digitized by an accurate 10-Bit (XRD9810)

or 12-Bit (XRD9812) A/D converter. The analog front-end

can be configured for inverting/ non-inverting input, CDS

or sample-hold (S/H) mode, or AC/DC coupling, making

the XRD9810/12 ideal for use in CCD, CIS and other data

acquisition applications. The CDS mode of operation

supports both line and pixel-clamp modes and can be

used to achieve significant reduction in system 1/f noise

and CCD reset clock feed-through.

PGA gain and channel offsets can be updated ona line by

line basis. Each channel can have a seperate offset and

gain setting.

The differential inputs reject common mode noise that

can accumulate in a scanner system due to lamp

switching and cabling.

In S/H mode the internal DC-restore voltage clamp can be

enabled or disabled to support AC-coupled or DC inputs.

Sampling mode, PGA gain, channel offset and input

signal polarity are all programmable through a serial

interface. PGA gain (1-10) and channel offset (-300mV to

300mV) are programmable in 256 linear steps. The A/D

Full-Scale Range (FSR) is programmable to 2V or 3V.

ORDERING INFORMATION

Part No.

XRD9810ACQ

XRD9812ACQ

Package

32-Lead TQFP

32-Lead TQFP

Operating

Temperature Range

0°C to +70°C

0°C to +70°C

Rev. 1.00

E1999

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017

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