MAX7451ESA+T Maxim Integrated Products, MAX7451ESA+T Datasheet

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MAX7451ESA+T

Manufacturer Part Number
MAX7451ESA+T
Description
Video ICs Video Conditioner wi th AGC and Back Porc
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX7451ESA+T

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX7450/MAX7451/MAX7452 complete front-end
video-signal conditioners are designed to improve the
quality of standard-definition video signals. The devices
restore the DC level of the video input, correct for
amplitude errors up to ±6dB, detect fault conditions,
and filter out-of-band noise. The MAX7450/MAX7451/
MAX7452 optimize the signal quality for further video
processing through a crosspoint switch or video
decoder (ADC). Each device integrates an input video
clamp, automatic gain control (AGC), loss-of-sync
(LOS) detector, and an out-of-band noise/lowpass filter.
These devices also incorporate a user-selectable
buffer gain (0 or +6dB) and an AGC-disable function.
The MAX7450 and MAX7451 operate from dual power
supplies of ±5V or ±3.3V respectively, and they restore
the video blanking level to GND. The MAX7452 operates
from a single +5V supply and features a user-adjustable
clamp level.
The devices are available in an 8-pin SO package with
an exposed pad and are specified for operation over
the extended (-40°C to +85°C) temperature range.
19-3267; Rev 2; 11/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Signal Conditioner for Standard-Definition
Video Inputs
Security Video Systems
Video-Switching Systems
VIDEO
INPUT
________________________________________________________________ Maxim Integrated Products
General Description
IN
Video-Signal Conditioners with AGC
V
Applications
SS
V
FILTER
NOISE
CC
SYNC SEPARATOR
AND AMPLITUDE
DETECTOR
±6dB
GND
♦ Back-Porch Clamp to GND (MAX7450/MAX7451)
♦ Adjustable Back-Porch Clamp (MAX7452)
♦ Automatic Gain Control (±6dB Range) Normalizes
♦ Input Fault Detection with LOS Output
♦ Inherent 50Hz/60Hz Input Rejection of 60dB
♦ Single-Supply Operation: MAX7452 (+5V)
♦ Out-of-Band Noise Filter
♦ Output Buffer Drives Standard 150Ω Video Load
♦ Dual-Supply Operation
♦ Tiny 8-Pin SO Package
*EP = Exposed pad.
and Back-Porch Clamp
MAX7450ESA
MAX7451ESA
MAX7452ESA
Package code = S8E-12.
Signals to Standard Video Level
with 0dB or +6dB Gain
GAIN SET (0dB OR +6dB)
MAX7450
MAX7451
MAX7450 (±5V)
MAX7451 (±3.3V)
PART
0 OR +6dB
-40°C to +85°C 8 SO-EP*
-40°C to +85°C 8 SO-EP*
-40°C to +85°C 8 SO-EP*
TEMP RANGE
OUT
Ordering Information
LOS
AGCD
Functional Diagram
75Ω
PIN-
PACKAGE
Features
VOLTAGE (V)
SUPPLY
75Ω
±
+5
±
3.3
5
1

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MAX7451ESA+T Summary of contents

Page 1

... Video Inputs Security Video Systems Video-Switching Systems IN VIDEO INPUT ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. and Back-Porch Clamp ♦ Back-Porch Clamp to GND (MAX7450/MAX7451) ♦ Adjustable Back-Porch Clamp (MAX7452) ♦ ...

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Video-Signal Conditioners with AGC and Back-Porch Clamp ABSOLUTE MAXIMUM RATINGS V to GND CC MAX7450/MAX7452...........................................................+6V MAX7451 ...........................................................................+ GND SS MAX7450.............................................................................-6V MAX7451.............................................................................-4V OUT MAX7450/MAX7451 ..........................................-2.5V to +3.5V MAX7452 ................................................-0. GSET, AGCD, LOS .....................................-0. Stresses beyond ...

Page 3

Video-Signal Conditioners with AGC ELECTRICAL CHARACTERISTICS (continued ±5V ±5% (MAX7450), V SUPPLY SUPPLY 20pF, GSET = 1, AGCD = MIN PARAMETER SYMBOL Signal-to-Noise Ratio Line Time Distortion Field Time Distortion Input Leakage Current ...

Page 4

Video-Signal Conditioners with AGC and Back-Porch Clamp V = ±5V ±5% (MAX7450), V SUPPLY SUPPLY 20pF, GSET = 1, AGCD = +25°C, unless otherwise noted. A GROUP DELAY vs. FREQUENCY 0.1 ...

Page 5

V = ±5V ±5% (MAX7450), V SUPPLY 20pF, GSET = 1, AGCD = OUTPUT BACK-PORCH LEVEL (MAX7450) MAX7450 toc08 IN AC-COUPLED 200mV/div OUT 200mV/div 1μs PIN NAME MAX7450/ MAX7452 MAX7451 ...

Page 6

Video-Signal Conditioners with AGC and Back-Porch Clamp VIDEO INPUT GND Figure1. MAX7452 Functional Diagram Detailed Description As shown in Figure 1, the devices include a 2nd-order lowpass filter intended to reject out-of-band noise. The MAX7450/MAX7451 clamp the ...

Page 7

Video-Signal Conditioners with AGC Table 1. Gain-Control Settings AGCD GSET Automatic Gain Control (AGC) The MAX7450/MAX7451/MAX7452 have an integrated automatic gain-control circuit to ensure the sync ampli- tude is normalized to the ...

Page 8

Video-Signal Conditioners with AGC and Back-Porch Clamp NOISE VIDEO FILTER INPUT SYNC SEPARATOR AND AMPLITUDE V SS Figure 3. MAX7452 Interfaced to a Video Decoder for the analog-to-digital conversion. This voltage must be scaled by a ratio ...

Page 9

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2004 Maxim Integrated Products ...

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