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W6662CF

Winbond
Part Number W6662CF
Manufacturer Winbond
Description SCANNER ANALOG FRONT END
Published Apr 17, 2005
Detailed Description Preliminary W6662CF SCANNER ANALOG FRONT END 1. GENERAL DESCRIPTION The W6662 is a highly integrated CCD/CIS analog fron...
Datasheet PDF File W6662CF PDF File

W6662CF
W6662CF

Overview
Preliminary W6662CF SCANNER ANALOG FRONT END 1.
GENERAL DESCRIPTION The W6662 is a highly integrated CCD/CIS analog front end signal processor.
It provides the components required for all necessary front-end signal process of a CCD/CIS scanner, including a 3channel input clamp circuit for correlated double sampling (short as CDS) mode, a multiplexer to mux 3-channel inputs to a correlated double sampling (CDS) circuit, a programmable offset adjusted and gain controlled amplifier, a 12-bit analog-to-digital converter.
CDS or S&H (sample and hold) of operation modes can be chosen.
The device configuration is programmed via 3-wire or 4-wired interface, operation modes, offset and gain value of each channel can be programmed.
2.
FEATURES • 12-bit A/D Converter • No Missing Code Guaranteed • Three channels analog input with clamp circuit individually • Integrated Correlated Double Sampler (CDS) • Supports Contact Image Sensors (CIS) • Accept CCD/CIS sensor with three channel or single channel analog out • External offset voltage input for CIS reference voltage • Built-in bandgap reference circuit for CDS mode and A/D Converter • Integrated 6-bit Programmable Gain Amplifier (PGA) with 3-channel register selected • Integrated 8-bit offset adjustment with 3-channel register selected • 3 MHz sampling rate of offset/gain adjustment circuit • Three-wired or four-wired Serial Interface programmable • Registers readback capability • Low power CMOS device • Power down mode supported • 3/5V digital I/O pin • Packageed in 48-pin QFP Applications: Flatbed Scanners Sheetfeed Scanners Film Scanners Publication Release Date: December 1998 - 1 - Revision A1 3.
PIN CONFIGURATION Preliminary W6662CF VRDB VRDB VRDT VRDT AVDD NC AVSS OEN DOUT11 DOUT10 DOUT9 AVDD VRDC VREF VINR AVSS VING AVSS VINB AVSS NC AVDD CISREF PAOUT Winbond W6662CF 48 47 46 45 44 43 42 41 40 39 38 37 1 36 2 35 3 34 4 33 5 32 6 31 7 30 8 29 9 28 10 27 11 26 12 25 13 14 15 16 17 18 19 20 21 22 23 24 NC AVSS DOUT8...


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