MAX7472 Datasheet, PDF (1/19 Pages) Minilogic Device Corporation Limited – HDTV Anti-Aliasing Filters with Triple-Input Mux

19-0619; Rev 0; 8/06
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HDTV Anti-Aliasing Filters with Triple-Input Mux
General Description
The MAX7472/MAX7473 triple-channel anti-aliasing fil-
ters 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 com-
puter format signals, the MAX7472/MAX7473 support
component video (Y P_B P_R, 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 inter-
face. The adjustable cutoff frequency allows filter opti-
mization 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.
The MAX7472/MAX7473 drive a 2V_P-P video signal into
a standard 150Ω load. The inputs are AC-coupled and
the outputs can be either DC- or AC-coupled. The
MAX7472 has a gain of 0dB and the MAX7473 has a
gain of +6dB. Both devices are available in a 28-pin
TQFN package and are fully specified over the upper-
commercial (0°C to +85°C) temperature range.
HDTV (LCD, PDP, DLP, CRT)
Set-Top Boxes
Personal Video Recorders
Home Theaters
Applications
Typical Operating Circuit appears at end of data sheet.
Features
o Continuously Variable Anti-Aliasing Filter
5MHz to 34MHz in 256 Steps
o 3:1 Input Mux on Each Video Filter
o Supports All Standard Video and Computer Input
Formats
480i, 480p, 720p, 1080i
QVGA, VGA, SVGA, XGA, SXGA, UXGA
Y P_B P_R, GsBR, RGBHV, Y/C, CVBS
o Accepts Any Input Sync Format
Sync on Y, Sync on G, External Sync
(Positive or Negative)
Sync on All Channels
o Buffered Outputs Drive Standard 150Ω Video Load
0dB (MAX7472)
+6dB (MAX7473)
o DC- or AC-Coupled Outputs
o Single +5V Analog and +3.3V Digital Supplies
o 5mW Power-Down Mode
o Lead (Pb)-Free 28-Pin TQFN Package
Ordering Information
PART
PIN-PACKAGE
PKG CODE
BUFFER
GAIN (dB)
MAX7472UTI+ 28 TQFN-EP*
T2855-8
0
MAX7473UTI+** 28 TQFN-EP*
T2855-8
+6
Note: All devices are specified over the 0°C to +85°C operat-
ing temperature range.
+Indicates lead-free packaging.
*EP = Exposed pad.
**Future product—contact factory for availability.
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
AVDD 22
A0 23
A1 24
AGND 25
AGND 26
MAX7472
MAX7473
INA1 27
EP*
+
INB1 28
14 SCL
13 SYNCC
12 SYNCB
11 SYNCA
10 DGND
9 INC3
8 INB3
1 234567
TQFN
5mm x 5mm
*EXPOSED PAD.
________________________________________________________________ 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.