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MAX7469, MAX7470
HDTV Continuously Variable Anti-Aliasing Filters
All Video Formats Supported and Optimization of Corner Frequency for Enhanced Video Quality and Noise Reduction
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Status
All versions are No Longer Available.
Description
The MAX7469/MAX7470 triple-channel, anti-aliasing filters
and buffers are ideal for high-definition (HD) and
standard-definition (SD) television (TV) applications.
Compatible with 1080i, 720p, 480p, and 480i scanning
system standards and computer format signals, the
MAX7469/MAX7470 support component video (Y Pb Pr,
GsBR, and RGBHV), as well as composite (CVBS) and
S-video (Y/C).
The MAX7469/MAX7470 limit the input bandwidth for
anti-aliasing and out-of-band noise reduction prior to
digital conversion by an ADC or video decoder. The
MAX7469/MAX7470 frequency response can be continuously
varied in 256 linear steps through an I²C interface
from below SD resolution to beyond HD resolution.
The output buffers of the MAX7469/MAX7470 drive a
2VP-P video signal into a standard 150Ω load. The inputs are AC-coupled, and the outputs can be either DC- or
AC-coupled. The MAX7469 has a gain of 0dB, and the
MAX7470 has a gain of +6dB. Both devices are available
in a 20-pin TQFN package and are fully specified over
the 0°C to +85°C upper-commercial temperature range.
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Data Sheet
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Key Features
- Continuously Variable Anti-Aliasing Filter
- 5MHz to 34MHz in 256 Steps
- Supports All Standard Video and Computer Input Formats
- 480i, 480p, 720p, 1080i
- QVGA, VGA, SVGA, XGA, SXGA, UXGA
- Y Pb Pr, GsBR, RGBHV, Y/C, CVBS
- Accepts Any Input Sync Format
- Sync on Y, Sync on G, External Sync (Positive or Negative)
- Sync on All Channels
- Buffered Outputs Drive Standard 150Ω Video Load
- 0dB (MAX7469)
- +6dB (MAX7470)
- DC- or AC-Coupled Outputs
- Single +5V Analog and +3.3V Digital Supplies
- 5mW Power-Down Mode
- 20-Pin TQFN Lead-Free Package
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Applications/Uses
- HDTV (LCD, PDP, DLP, CRT)
- Home Theaters
- Personal Video Recorders
- Set-Top Boxes
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Diagram
 Typical Operating Circuit
Didn't Find What You Need?
Information Index
Document Ref.: 19-0548
Rev 1;
2007-05-18
This page last modified: 2007-09-04
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