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MAX7473UTI+

Description
SWITCHED CAPACITOR FILTER, LOWPASS, QCC28
Categoryaccessories   
File Size279KB,19 Pages
ManufacturerMinilogic
Websitehttp://www.minilogic.com.hk
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MAX7473UTI+ Overview

SWITCHED CAPACITOR FILTER, LOWPASS, QCC28

19-0619; Rev 0; 8/06
KIT
ATION
EVALU
E
BL
AVAILA
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 I
2
C 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 I
2
C 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.
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
MAX7472/MAX7473
Ordering Information
PART
PIN-PACKAGE
28 TQFN-EP*
PKG CODE
T2855-8
BUFFER
GAIN (dB)
0
Applications
HDTV (LCD, PDP, DLP, CRT)
Set-Top Boxes
Personal Video Recorders
Home Theaters
MAX7472UTI+
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
OUT1
OUT2
OUT3
AV
DD
DV
DD
16
AV
DD
21
AV
DD
22
A0 23
20
19
18
17
15
14
13
12
SCL
SYNCC
SYNCB
SYNCA
DGND
INC3
INB3
SDA
11
10
EP*
9
8
1
INC1
2
AGND
3
INA2
4
INB2
5
INC2
6
AGND
7
INA3
TOP VIEW
Typical Operating Circuit appears at end of data sheet.
A1 24
AGND 25
AGND 26
INA1 27
INB1 28
+
MAX7472
MAX7473
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.

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