MAX7448EUD+ Maxim Integrated, MAX7448EUD+ Datasheet

MAX7448EUD+

Manufacturer Part Number

MAX7448EUD+

Description

Active Filter Integrated Circuits (ICs)

Manufacturer

Maxim Integrated

Datasheet

1.MAX7447EUDT.pdf (7 pages)

Specifications of MAX7448EUD+

Number Of Channels

Cutoff Frequency

5 MHz

Supply Voltage - Max

5.25 V

Supply Voltage - Min

4.75 V

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Package / Case

TSSOP EP

Minimum Operating Temperature

- 40 C

Factory Pack Quantity

Current page: 1 of 7
Download datasheet (286Kb)

The MAX7448, 4-channel, buffered video reconstruc-

tion filter is ideal for anti-aliasing and digital-to-analog

converter (DAC)-smoothing video applications or wher-

ever analog video is reconstructed from a digital data

stream (such as cable/satellite/terrestrial set-top boxes,

DVD players, hard-disk recorders (HDRs), and person-

al 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 MAX7448 processes RGB and asynchronous CVBS

video signals. The output video buffers have a fixed gain

of +6dB. The channel used for CVBS video has high-fre-

quency boost circuitry, which provides picture sharpness

with +1.2dB of gain boost without degradation in the

stopband. The output video drivers can be disabled with

an external pin.

The MAX7448 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.

19-2989; Rev 1; 4/06

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.

Set-Top Boxes/HDRs

Game Consoles

Desktop Video Editors

(WITH SYNC)

________________________________________________________________ Maxim Integrated Products

CVBS

ENCODER

D/A

General Description

0.1µF

DVD Players

Digital VCRs

INC

IND

INA

INB

Applications

4-Channel RGB Video Filter with

LOWPASS

FILTER

MAX7448

GND

DETECTOR

SYNC

Asynchronous CVBS Input

♦ 4-Channel Filter and Buffer for RGB and CVBS

♦ 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

♦ Small 14-Pin TSSOP Package

*EP = Exposed pad.

Pin Configuration appears at end of data sheet.

MAX7448EUD

Video Signals

Interlaced SDTV Video Signals

DISABLE

PART

OUTA

OUTB

OUTC

OUTD

75Ω

*OPTIONAL CAPACITORS

RANGE

-40°C to

+85°C

TEMP

Ordering Information

Functional Diagram

PIN-

PACKAGE

14 TSSOP-EP*

75Ω

Features

PACKAGE

U14E-3

CODE

Related parts for MAX7448EUD+

MAX7448EUD+ Summary of contents

Page 1

... D/A 0.1µF CVBS D/A (WITH SYNC) ________________________________________________________________ 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. 4-Channel RGB Video Filter with Asynchronous CVBS Input ♦ 4-Channel Filter and Buffer for RGB and CVBS Video Signals ♦ ...

Page 2

RGB Video Filter with Asynchronous CVBS Input ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................................+6V CC All Other Pins to GND.................................-0. Maximum Current into Any Pin Except V CC Continuous Power Dissipation (T = +70°C) A TSSOP-EP (derate ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V ±5 20pF GAIN = +6dB unless otherwise noted. Typical values are at V MIN MAX A PARAMETER SYMBOL DISABLE Output ...

Page 4

RGB Video Filter with Asynchronous CVBS Input (V = +5V +25°C, unless otherwise noted GROUP DELAY vs. FREQUENCY 100 0 FREQUENCY (MHz) SUPPLY CURRENT vs. TEMPERATURE 120 INPUTS ...

Page 5

PIN NAME Channel A Video Input. Use channel A for the green (G with sync) video signal. AC-couple INA with a series 1 INA 0.1µF capacitor. Channel B Video Input. Use channel B for the red (R) video signal. AC-couple ...

Page 6

RGB Video Filter with Asynchronous CVBS Input Output Clamp Level When a sync pulse is detected on channel A, the DC restore loop is activated for channel A, B, and C. Channel D’s DC restore loop is activated by ...

Page 7

... 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 _____________________ 7 © 2006 Maxim Integrated Products ...

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