Rainbow Electronics MAX7473 - Manual

MAX7472/MAX7473
HDTV Anti-Aliasing Filters with Triple-Input Mux
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-0619; Rev 0; 8/06
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.
♦ 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 P
B P R , 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
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
EVALUATION KIT
AVAILABLE
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.
PART PIN-PACKAGE PKG CODE
BUFFER
GAIN (dB)
MAX7472UTI+ 28 TQFN-EP* T2855-8 0
MAX7473UTI+** 28 TQFN-EP* T2855-8 +6
26
27
25
24
10
9
11
AGND
INB2 INC2 AGND
INA3
12
INC1
AV
DD
AV
DD
OUT3 OUT1 DV
DD
SDA
1 2
AGND
4 5 6 7
20 21 19 17 16 15
AGND
INA1
SYNCB
SYNCA
DGND
INC3
MAX7472
MAX7473
INA2
OUT2
3
18
28
+
8 INB1 INB3
A1
23 13 SYNCC A0
22 14 SCL AV DD
TQFN
5mm x 5mm
*EXPOSED PAD.
TOP VIEW
EP*
Pin Configuration
HDTV (LCD, PDP, DLP, CRT)
Set-Top Boxes
Personal Video Recorders
Home Theaters
Applications
Typical Operating Circuit appears at end of data sheet.