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General Description

The MAX7440/MAX7441/MAX7442 six-channel video

reconstruction filters replace 30 or more discrete com-

ponents. The devices are ideal for digital-to-analog

converter (DAC) video reconstruction applications,

when analog video is reconstructed from a digital data

stream. The MAX7440/MAX7441/MAX7442 operate

from a single +5V power supply. The inputs are DC-

coupled from the DAC and the output can either be AC-

or DC-coupled. The DC-IN, DC-OUT architecture, leads

to a perfect line-time distortion performance (zero tilt).

The filters have a cutoff frequency optimized for PAL,

NTSC, and SDTV video applications and offer three

high-frequency boost options. The MAX7440 offers a

flat passband response on all six channels; the

MAX7441/MAX7442 offer high-frequency boost on the

three channels used for CVBS and Y/C. The MAX7440/

MAX7441/MAX7442 are available in a 14-pin SO pack-

age and are fully specified over the extended tempera-

ture range.

Applications

Features

♦ Replace 30 or More Discrete Components

♦ Ideal for CVBS, Y/C (S-Video), and RGB or Y Pb Pr

Applications

♦ 45dB Attenuation at 27MHz

♦ -0.2dB Passband Response

♦ Ideal for STBs with SCART Interface

♦ +5V Single-Supply Voltage

♦ Input Common-Mode Range Includes GND

♦ DC-Coupled Input, DC/AC-Coupled Output

♦ 14-Pin SO Package

MAX7440/MAX7441/MAX7442

6-Channel Integrated Video Reconstruction

Filters

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2750; Rev 0; 1/03

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.

PART TEMP RANGE

PIN-

PACKAGE

H IG H -

F R EQ U EN C Y

B O O ST

MAX7440ESD -40°C to +85°C 14 SO No

MAX7441ESD -40°C to +85°C 14 SO Yes

MAX7442ESD* -40°C to +85°C 14 SO Yes

*Future product—contact factory for availability.

75Ω

A/V SWITCHING

DEVICE (MAX4399)

OR BUFFERS

OUT1

IN1

+5V

0.1µF1µF

LOWPASS FILTER

WITH HF BOOST*

A = +1V/V

D/A

ENCODER

75Ω

OUT2

IN2

LOWPASS FILTER

A = +1V/V

D/A

75Ω

OUT3

IN3

LOWPASS FILTER

A = +1V/V

D/A

75Ω

OUT4

IN4

LOWPASS FILTER

A = +1V/V

D/A

75Ω

OUT5

IN5

LOWPASS FILTER

WITH HF BOOST*

A = +1V/V

D/A

75Ω

OUT6

*MAX7440 HAS FLAT RESPONSE, MAX7441/MAX7442 INCLUDES HF BOOST.

IN6

LOWPASS FILTER

WITH HF BOOST*

A = +1V/V

D/A

75Ω

MAX7440

MAX7441

MAX7442

Typical Application Circuit

STB

DVDs

Hard Disk Recorders

PVR

SCART Video Applications

General Video Filtering

Summary of content (7 pages)

PAGE 1
9-2750; Rev 0; 1/03 6-Channel Integrated Video Reconstruction Filters Applications STB PVR DVDs SCART Video Applications Hard Disk Recorders General Video Filtering Features ♦ Replace 30 or More Discrete Components ♦ Ideal for CVBS, Y/C (S-Video), and RGB or Y Pb Pr Applications ♦ 45dB Attenuation at 27MHz ♦ -0.
PAGE 2
MAX7440/MAX7441/MAX7442 6-Channel Integrated Video Reconstruction Filters ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................................+6V All Other Pins to GND.................................-0.3V to (VCC + 0.3V) Maximum Current into Any Pin .........................................±50mA Continuous Power Dissipation (TA = +70°C) 14-Pin SO (derate 8.3mW/°C above +70°C)..............666.7mW Operating Temperature Range ...........................
PAGE 3
6-Channel Integrated Video Reconstruction Filters (VCC = +5V ±5%, RL = 5kΩ, CL = 0 to 20pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN Input Resistance TYP MAX UNITS 200 Input Capacitance kΩ 20 Supply Voltage Range VCC Supply Current ICC Power-Supply Rejection Ratio pF 4.75 VCC = +5.5V, no load PSRR VIN = 100mVP-P DC Level Shift 5.25 V 78 mA 57 DC 39 f = 0 to 1MHz 30 OUT_ to IN_ dB 0.85 1.
PAGE 4
Typical Operating Characteristics (continued) (VCC = +5V, RL = 5kΩ, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. TEMPERATURE 2 3 4 6 5 7 DIFFERENTIAL PHASE 54 52 50 -40 -15 10 35 60 85 MAX7440 toc09 MAX7440 toc08 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1 56 4.5 4.0 SIGNAL SWING (VP-P) DIFFERENTIAL GAIN (%) 58 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 DIFFERENTIAL PHASE (DEGREES) MAX7440 toc07 60 SUPPLY CURRENT (mA) SIGNAL SWING vs. LOAD DIFFERENTIAL GAIN 62 3.5 3.0 2.5 2.0 1.5 1.0 0.
PAGE 5
6-Channel Integrated Video Reconstruction Filters PIN NAME 1 IN1 Channel 1 Filter Input (Optional Boosted Channel) FUNCTION 2 IN2 Channel 2 Filter Input 3 IN3 Channel 3 Filter Input 4 VCC +5V Power Supply. Bypass to GND with a 0.1µF and 1µF capacitor.
PAGE 6
MAX7440/MAX7441/MAX7442 6-Channel Integrated Video Reconstruction Filters VCC +5V 0.1µF 1µF ENCODER MAX7440 MAX7441 MAX7442 IN1 D/A LOWPASS FILTER DISABLE A = +1V/V OUT1 IN 75Ω ZO = 75Ω MAX4394 OUT1 75Ω 510Ω 510Ω DISABLE IN6 D/A LOWPASS FILTER A = +1V/V OUT6 IN 75Ω MAX4394 ZO = 75Ω OUT6 75Ω 510Ω 510Ω Figure 1.
PAGE 7
6-Channel Integrated Video Reconstruction Filters N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS DIM A A1 B C e E H L 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.