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AFE FOR CCD/CIS SIGNAL PROCESSOR

GENERAL DESCRIPTION

The samsung analog front end(AFE) for CCD/CIS

image

signal

is

an

integrated

analog

signal

processor for color image signal.

The AFE converts CCD/CIS output signal to digital

data.

The

AFE

includes

three-channel

CDS(Correlated

Double

Sampling)

circuit,

PGA(Programmable Gain Amplifier), and 12-bit

analog to digital converter with reference generator.

A parallel data bus provides a simple interface to

8-bit microcontroller.

BW1224L

FEATURES

- 12-bit 6MSPS A/D Converter

- Integrated Triple Correlated Double

Sampler

- 3-Channel 2 MSPS Color Mode

- Analog Programmble Gain Amplifier

- Internal Voltage Reference

- Wide clamp level controllability for

CIS sensor

- No Missing Code Guaranteed

- Microcontroller-Compatible Control

Interface

- Operation by Single 5V Supply

- CMOS Low Power Dissipation

APPLICATIONS

- Color and B/W Scanner

- Digital Copiers

- Facsimile

- General Purpose CCD/CIS imager

KEY SPECIFICATION

- Resolution: 12-bit

- Conversion Rate: 6 MHz(2 MHz*3)

- Supply Voltage: 5 V

鹵

5%

- Power Dissipation: 375 mW(Typical)

FUNCTIONAL BLOCK DIAGRAM

RED

CDS

PGA

REF

GREEN

CDS

INPUT OFFSET

REGISTER

D[11:0]

PGA

MUX

ADC

MPU

BLUE

CDS

PGA

GAIN

REGISTER

PORT

Ver 1.4 (Dec., 1998)

No responsibility is assumed by SEC for its use nor for any

infringements of patents or other rights of third parties that may

result from its use. The content of this datasheet is subject to

change without any notice.

SAMSUNG ELECTRONICS Co. LTD

next

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