General Description

The MAX7472/MAX7473 triple-channel anti-aliasing filters and buffers with triple-input mux are ideal for high definition (HD) and standard-definition (SD) television (TV) applications. Compatible with 1080i, 720p, 480p, and 480i scanning system standards as well as computer format signals, the MAX7472/MAX7473 support component video (Y PB PR, GsBR, and RGBHV) as well as composite (CVBS) and S-video (Y/C).

The MAX7472/MAX7473 limit the input bandwidth for anti-aliasing and out-of-band noise reduction prior to digital conversion by an ADC or video decoder. The frequency response of the MAX7472/MAX7473 can be continuously varied in 256 linear steps from below SD response to beyond HD response through an I2C interface. The adjustable cutoff frequency allows filter optimization for sampling rate and noise reduction. The MAX7472/MAX7473 also include 3:1 multiplexers for selection of three complete sets of video inputs through the I2C interface.

Features

♦ Continuously Variable Anti-Aliasing Filter

5MHz to 34MHz in 256 Steps

♦ 3:1 Input Mux on Each Video Filter

♦ 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 (MAX7472)

+6dB (MAX7473)

♦ DC- or AC-Coupled Outputs

♦ Single +5V Analog and +3.3V Digital Supplies

♦ 5mW Power-Down Mode

♦ Lead (Pb)-Free 28-Pin TQFN Package

Applications

HDTV (LCD, PDP, DLP, CRT)

Set-Top Boxes

Personal Video Recorders

Home Theaters