Document
19-2750; Rev 0; 1/03
6-Channel Integrated Video Reconstruction Filters
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.
Features
o Replace 30 or More Discrete Components o Ideal for CVBS, Y/C (S-Video), and RGB or Y Pb Pr Applications o 45dB Attenuation at 27MHz o -0.2dB Passband Response o Ideal for STBs with SCART Interface o +5V Single-Supply Voltage o Input Common-Mode Range Includes GND o DC-Coupled Input, DC/AC-Coupled Output o 14-Pin SO Package
MAX7440/MAX7441/MAX7442
Ordering Information
PART MAX7440ESD MAX7441ESD TEMP RANGE PINPACKAGE HIGHFREQUENCY BOOST No Yes Yes
Applications
STB DVDs Hard Disk Recorders PVR SCART Video Applications General Video Filtering
+5V
-40°C to +85°C 14 SO -40°C to +85°C 14 SO
MAX7442ESD* -40°C to +85°C 14 SO *Future product—contact factory for availability.
Typical Application Circuit
0.1µF ENCODER 1µF MAX7440 MAX7441 MAX7442 IN1 LOWPASS FILTER WITH HF BOOST* A = +1V/V OUT1 A/V SWITCHING DEVICE (MAX4399) OR BUFFERS
75Ω
75Ω
D/A
D/A
IN2
LOWPASS FILTER
A = +1V/V
OUT2
75Ω
75Ω
D/A
IN3
LOWPASS FILTER
A = +1V/V
OUT3
75Ω
75Ω
D/A
IN4
LOWPASS FILTER
A = +1V/V
OUT4
75Ω
75Ω
D/A
IN5
LOWPASS FILTER WITH HF BOOST*
A = +1V/V
OUT5
75Ω
75Ω
D/A
IN6
LOWPASS FILTER WITH HF BOOST*
A = +1V/V
OUT6
75Ω
75Ω
*MAX7440 HAS FLAT RESPONSE, MAX7441/MAX7442 INCLUDES HF BOOST.
________________________________________________________________ Maxim Integrated Products
1
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.
6-Channel Integrated Video Reconstruction Filters MAX7440/MAX7441/MAX7442
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 ............................