MAX7474EAE+ Maxim Integrated Products, MAX7474EAE+ Datasheet

MAX7474EAE+

Manufacturer Part Number

MAX7474EAE+

Description

IC ADAPTV EQ VID OVER UTP 16SSOP

Manufacturer

Maxim Integrated Products

Type

Equalizerr

Datasheet

1.MAX7474EAE.pdf (10 pages)

Specifications of MAX7474EAE+

Applications

Security Systems

Mounting Type

Surface Mount

Package / Case

16-SSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 10
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The MAX7474 adaptive equalizer recovers losses

incurred in the transmission of a composite video

(CVBS) signal over unshielded twisted-pair (UTP)

cable. The device fully recovers losses for cable

lengths of up to 300m and greatly improves signal qual-

ity for cable lengths of up to 600m. The device automat-

ically adapts to all cable lengths for CVBS signals with

color burst and allows fixed-equalization settings for

video signals without burst. The MAX7474 is optimized

to provide compensation for losses that occur when

transmitting composite video signals over UTP cables

such as Category 5e. The device compensates for low

frequency and chroma band losses. The MAX7474 is

compatible with NTSC and PAL standards.

The MAX7474 accepts differential input and provides a

single-ended output. The output is capable of driving

two AC- or DC-coupled standard 150Ω video loads.

The output back-porch DC level is adjustable with an

externally applied DC voltage at the BPLVL input. The

device also features loss-of-sync (LOS) and loss-of-burst

(LOB) logic outputs.

The MAX7474 is available in a 16-pin SSOP package

and is fully specified over the extended (-40°C to

+85°C) temperature range.

19-3216; Rev 0; 1/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Security Video Systems

Video Switching Systems

Home Automation

CAMERA

________________________________________________________________ Maxim Integrated Products

UNSHIELDED TWISTED PAIR

General Description

(0 TO 300m)

Applications

50Ω

0.022µF

FEQ0

FEQ1

INN

INP

Video Over Twisted Pair

♦ Automatically Equalizes Up to 600m

♦ Automatic Switchover to Fixed Equalization for

♦ Integrated Video Driver with Adjustable

♦ LOS and LOB Output

♦ NTSC and PAL Compatible

♦ 16-Pin SSOP Package

+ Denotes a lead-free package.

Pin Configuration and Typical Application Circuit appear at

end of data sheet.

MAX7474EAE+

Adaptive Equalizer for

(Fully Recovers Losses Up to 300m) of UTP Cable

Carrying CVBS

CVBS Without Color Burst

Back-Porch Clamp Level

CLAMP

PART

0.1µF

+5V

AGC AND AEQ

EQUALIZER

CONTROL

ADAPTIVE

GND

-40°C to +85°C

TEMP RANGE PIN-PACKAGE

0.1µF

+5V

Ordering Information

BACK-PORCH

Functional Diagram

CLAMP

MAX7474

16 SSOP

(5.3mm x 6.2mm)

LOB

OUT

BPLVL (1.0V TO 1.6V)

LOS

Features

ADC

A16+2

CODE

PKG

Related parts for MAX7474EAE+

MAX7474EAE+ Summary of contents

Page 1

... Integrated Video Driver with Adjustable Back-Porch Clamp Level ♦ LOS and LOB Output ♦ NTSC and PAL Compatible ♦ 16-Pin SSOP Package PART MAX7474EAE+ + Denotes a lead-free package. Applications Pin Configuration and Typical Application Circuit appear at end of data sheet. 0.1µF ...

Page 2

Adaptive Equalizer for Video Over Twisted Pair ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V CC All Other Pins to GND.............-0.3V to (min Maximum Continuous Current into Any Input or Output .....±50mA Continuous Power Dissipation ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +4.75V to +5.25V 150Ω (AC-coupled), FEQ1 = GND, FEQ0 = GND noted. Typical values are +25°C.) A PARAMETER SYMBOL DIGITAL INPUTS (FEQ0, FEQ1) Input High Voltage V ...

Page 4

Adaptive Equalizer for Video Over Twisted Pair ( high impedance 3.58MHz, Category 5e cable with active driver MULTIBURST (0.5m CABLE) MAX7474 toc01 V INP 200mV/div V OUT 200mV/div 10µs/div 75% ...

Page 5

R = high impedance 3.58MHz, Category 5e cable with active driver 12.5T RESPONSE (300m CABLE) MAX7474 toc10 V -V INP 200mV/div V OUT 200mV/div 500ns/div NOISE SPECTRUM (0.5m CABLE ...

Page 6

Adaptive Equalizer for Video Over Twisted Pair PIN NAME GND Ground. Connect all GND terminals together. 5, 10, 13 Power-Supply Input. Connect a +4.75V to +5.25V supply Bypass each V Loss-of-Burst ...

Page 7

The chroma gain for the MAX7474 is automatically adjusted between 0dB and +12dB, while the low-fre- quency gain is automatically adjusted between -6dB and +3.6dB, providing full equalization for cable losses that can occur when using up to 300m of ...

Page 8

Adaptive Equalizer for Video Over Twisted Pair CAMERA 50Ω 1V P-P 50Ω CAMERA 50Ω 1V P-P 50Ω Figure 1. Typical Input and Output Connections of monitors or recording devices. Cabling is a signifi- cant part of a CCTV installation cost. ...

Page 9

Pin Configuration TOP VIEW 1 16 GND 2 15 GND GND MAX7474 GND LOB 6 10 BPLVL OUT SSOP VCC 1 JU2 2 3 VCC C3 C6 0.1µF ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

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