Rainbow Electronics MAX7442 User Manual

General Description

The MAX7440/MAX7441/MAX7442 six-channel video
reconstruction filters replace 30 or more discrete com­ponents. 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 DC­coupled from the DAC and the output can either be AC­or 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 pack­age and are fully specified over the extended tempera­ture 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.

*Future product—contact factory for availability.

75Ω

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

75Ω

75Ω

75Ω

75Ω

MAX7440
MAX7441
MAX7442

Typical Application Circuit

STB

DVDs

Hard Disk Recorders

PVR

SCART Video Applications

General Video Filtering

PART TEMP RANGE

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

PIN­PACKAGE

H IG H -

F R EQ U EN C Y

B O O ST

MAX7440/MAX7441/MAX7442

6-Channel Integrated Video Reconstruction
Filters

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V ±5%, RL= 5kΩ, CL= 0 to 20pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCCto GND ...........................................................................+6V

All Other Pins to GND.................................-0.3V to (V

CC

+ 0.3V)

Maximum Current into Any Pin .........................................±50mA

Continuous Power Dissipation (T

A

= +70°C)

14-Pin SO (derate 8.3mW/°C above +70°C)..............666.7mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Passband Response

Stopband Attenuation A

Boost Amplitude f = 4.5MHz

Differential Gain dG 5-step modulated staircase 0.05 %

Differential Phase dB 5-step modulated staircase 0.05 Degrees

Signal-to-Noise Ratio SNR

Group Delay Matching tg(MATCH)

Group Delay Deviation ∆

Line-Time Distortion H

Field-Time Distortion V

Low-Frequency Gain Variation A

Low-Frequency Gain 0.975 V/V

Low-Frequency Gain Matching t

Input Voltage Range 0 1.75 V

Channel-to-Channel Crosstalk X

Input Leakage Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

sb

g

dist

dist

V

g

TALK

IN

DC to 3.5MHz, MAX7440/MAX7441
(channels 2, 3, 4)

DC to 5MHz, MAX7440/MAX7441
(channels 2, 3, 4)

f = 27MHz 37 45 dB

Peak signal (1V
to 100MHz

Low-frequency
channel-to-channel
matching,
f = 200kHz

Deviation from
100kHz to 4.5MHz

18µs, 100IRE bar -3 0 +3 mV

130 lines, 18µs, 100IRE bar -4 +4 mV

Gain at f = 100kHz -0.25 +0.25 dB

f = 100kHz -3 +3 %

Channel-to-channel crosstalk, DC to 5MHz 71 dB

VIN = 0V 2 6 25 µA

-0.40 -0.2 +0.10

-0.80 -0.5 0

+1dB HF boost,
MAX7441

+2dB HF boost,
MAX7442

) to RMS noise, f = 10Hz

P-P

Channels 2, 3, 4 2

Channels 1, 5, 6 2

MAX7440/MAX7441/
MAX7442

MAX7441 (channels
1, 5, 6)

MAX7442 (channels
1, 5, 6)

0.4 0.60 0.91

1.2

71 dB

10

17

17

dB

dB

ns

ns

MAX7440/MAX7441/MAX7442

6-Channel Integrated Video Reconstruction

Filters

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V ±5%, RL= 5kΩ, CL= 0 to 20pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

0

-70

0.1 1 10 100

AMPLITUDE vs. FREQUENCY

-50

-60

MAX7440 toc01

FREQUENCY (MHz)

AMPLITUDE (dB)

-40

-30

-20

-10

PASSBAND AMPLITUDE vs. FREQUENCY

MAX7440 toc02

FREQUENCY (MHz)

AMPLITUDE (dB)

1

-8

-6

-4

-2

0

2

-10

0.1 10

PHASE RESPONSE vs. FREQUENCY

MAX7440 toc03

FREQUENCY (MHz)

PHASE (DEGREES)

1

-150

-100

-50

0

50

100

150

200

-200

0.1 10

80

40

0.1 1 10

GROUP DELAY vs. FREQUENCY

50

MAX7440toc04

FREQUENCY (MHz)

GROUP DELAY (ns)

60

70

MAX7441
(CHANNELS 2, 3, 4)

200ns/div

2T RESPONSE (1IRE = 7.14mV)

IN_

200mV/div

MAX7440 toc05

OUT_

200mV/div

400ns/div

MODULATED 12.5T RESPONSE

(1IRE = 7.14mV)

IN_

200mV/div

MAX7440 toc06

OUT_

200mV/div

Typical Operating Characteristics

(VCC= +5V, RL= 5kΩ, TA= +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Resistance 200 kΩ

Input Capacitance 20 pF

Supply Voltage Range V

Supply Current I

CC

CC

Power-Supply Rejection Ratio PSRR VIN = 100mV

DC Level Shift OUT_ to IN_ 0.85 1.05 V

4.75 5.25 V

VCC = +5.5V, no load 57 78 mA

P-P

DC 39

f = 0 to 1MHz 30

dB