MAX7439ETP+T Maxim Integrated, MAX7439ETP+T Datasheet

MAX7439ETP+T

Manufacturer Part Number

MAX7439ETP+T

Description

Active Filter Integrated Circuits (ICs)

Manufacturer

Maxim Integrated

Datasheet

1.MAX262ACNG.pdf (8 pages)

Specifications of MAX7439ETP+T

Number Of Channels

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Package / Case

TQFN EP

Minimum Operating Temperature

- 40 C

Factory Pack Quantity

2500

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The MAX7445 4-channel, buffered video reconstruction

filter is ideal for anti-aliasing and DAC-smoothing video

applications or wherever analog video is reconstructed

from a digital data stream (such as cable/satellite/ter-

restrial set-top boxes, DVD players, hard-disk recorders

(HDRs), and personal video recorders (PVRs)). This

device operates from a single +5V supply and has a

flat passband out to 5MHz with a stopband attenuation

of 43dB at 27MHz. This makes it ideal for use with

NTSC, PAL, and standard-definition digital TV (SDTV)

video systems. Each output is capable of driving two

standard 150Ω video loads.

The MAX7445 has three modes of operation. Mode 1

processes CVBS and RGB video signals. Mode 2

processes CVBS, Y, and C signals, as well as a second

asynchronous CVBS video signal. Mode 3 processes

RGB and CVBS (asynchronous) video signals. An exter-

nal pin adjusts the gain of the video buffer to either +6dB,

+9.5dB, or +12dB to accommodate video-encoder DAC

output signals of <1V. High-frequency boost circuitry pro-

vides picture sharpness with +1.2dB of gain boost with-

out degradation in the stopband. The output video drivers

can be disabled with an external pin.

The MAX7445 is available in a 14-pin TSSOP package

with an exposed pad, and is specified over the -40°C to

+85°C extended temperature range.

19-2948; Rev 1; 10/05

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.

Set-Top Boxes/HDRs

Game Consoles

Desktop Video Editors

________________________________________________________________ Maxim Integrated Products

4-Channel Video Reconstruction Filter

General Description

ENCODER

D/A

DVD Players

Digital VCRs

SELECT

0.1μF

Applications

INC

IND

INA

INB

LOWPASS

FILTER

GND

DETECTOR

SYNC

DISABLE

MAX7445

♦ 4-Channel Filter and Buffer for CVBS, RGB, or Y/C

♦ Filter Response Ideal for NTSC, PAL, and

♦ 43dB (typ) Stopband Attenuation at 27MHz

♦ ±0.75dB (max) Passband Ripple Out to 5MHz

♦ Blanking Level Voltage on Cable <1V

♦ Each Channel Drives Two 150Ω Video Loads

♦ +5V Single-Supply Voltage

♦ Selectable Gain: +6dB, +9.5dB, and +12dB

♦ Small 14-Pin TSSOP Package

* EP = Exposed pad.

Pin Configuration appears at end of data sheet.

MAX7445EUD

GAIN

Video Signals

Interlaced SDTV Video Signals

PART

OUTA

OUTB

OUTC

OUTD

*OPTIONAL CAPACITORS

75Ω

RANGE

-40°C to

+85°C

TEMP

Ordering Information

75Ω

Functional Diagram

PIN-PACKAGE

14 TSSOP-EP*

Features

PKG CODE

U14E-3

Related parts for MAX7439ETP+T

MAX7439ETP+T Summary of contents

Page 1

... D/A SELECT 0.1μF D/A ________________________________________________________________ Maxim Integrated Products 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. ♦ 4-Channel Filter and Buffer for CVBS, RGB, or Y/C Video Signals ♦ Filter Response Ideal for NTSC, PAL, and Interlaced SDTV Video Signals ♦ ...

Page 2

Video Reconstruction Filter ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................................+6V CC All Other Pins to GND.................................-0. Maximum Current into Any Pin Except V Continuous Power Dissipation (T = +70°C) A TSSOP-EP (derate 20.8mW/°C above +70°C) ...........1667mW Stresses ...

Page 3

Video Reconstruction Filter ELECTRICAL CHARACTERISTICS (continued +5V ±5 20pF 75Ω to GND for DC-coupled load GAIN = GND (+6dB (+9.5dB PARAMETER SYMBOL t ...

Page 4

Video Reconstruction Filter (V = +5V 0V +25°C, unless otherwise noted.) CC GAIN A AMPLITUDE vs. FREQUENCY 0 -20 -40 -60 NORMALIZED TO 0dB - FREQUENCY (MHz) GROUP DELAY vs. FREQUENCY 100 90 ...

Page 5

Video Reconstruction Filter PIN NAME 1 INA Channel A Video Input. AC-couple INA with a series 0.1µF capacitor. 2 INB Channel B Video Input. AC-couple INB with a series 0.1µF capacitor. 3 INC Channel C Video Input. AC-couple INC ...

Page 6

Video Reconstruction Filter Table 2. High-Frequency Boost for Each Mode HIGH-FREQUENCY BOOST (dB) CHANNEL MODE 1 MODE 2 A +1.2 B – C – D – Table 3. Gain Setting Control GAIN BUFFER GAIN (dB) GND V CC Floating ...

Page 7

Video Reconstruction Filter Pin Configuration TOP VIEW INA 1 14 INB 2 13 INC 3 12 MAX7445 IND 4 11 DISABLE 5 10 GND 6 9 GAIN 7 8 TSSOP _______________________________________________________________________________________ The TSSOP-EP package has an exposed pad on ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information is a registered trademark of Maxim Integrated Products, Inc ...

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