MAX7469 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – HDTV Continuously Variable Anti-Aliasing Filters

19-0548; Rev 0; 5/06
HDTV Continuously Variable
Anti-Aliasing Filters
General Description
The MAX7469/MAX7470 triple-channel, anti-aliasing fil-
ters and buffers are ideal for high-definition (HD) and
standard-definition (SD) television (TV) applications.
Compatible with 1080i, 720p, 720i, 480p, and 480i
scanning system standards and computer format sig-
nals, the MAX7469/MAX7470 support component video
(Y P_b P_r, G_sBR, 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 contin-
uously varied in 256 linear steps through an I²C* inter-
face from below SD resolution to beyond HD resolution.
The output buffers of the MAX7469/MAX7470 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 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.
Applications
HDTV (LCD, PDP, DLP, CRT)
Set-Top Boxes
Personal Video Recorders
Home Theaters
Pin Configuration
TOP VIEW
15 14 13 12 11
IN1 16
GND 17
IN2 18
GND 19
IN3 20
+
MAX7469
MAX7470
*EP
10 OUT1
9 AVDD
8 OUT2
7 AV_DD
6 OUT3
1 2345
Features
o Continuously Variable Anti-Aliasing Filter
5MHz to 34MHz in 256 Steps
o Supports All Standard Video and Computer Input
Formats
480i, 480p, 720i, 720p, 1080i
QVGA, VGA, SVGA, XGA, SXGA, UXGA
Y P_b P_r, G_sBR, 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 (MAX7469)
+6dB (MAX7470)
o DC- or AC-Coupled Outputs
o Single +5V Analog and +3.3V Digital Supplies
o 5mW Power-Down Mode
o 20-Pin TQFN Lead-Free Package
*Purchase of I²C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associate Companies, conveys a
license under the Philips I²C Patent Rights to use these compo-
nents in an I²C system, provided that the system conforms to the
I²C Standard Specification defined by Philips.
Ordering Information
PART
PIN-PACKAGE
BUFFER
GAIN (dB)
PKG
CODE
MAX7469UTP+ 20 TQFN-EP*
0
T2055-4
MAX7470UTP+** 20 TQFN-EP*
+6
T2055-4
Note: All devices are specified over the 0°C to +85°C operating
temperature range.
+ Indicates lead-free packaging.
*EP = Exposed pad.
**Future product—contact factory for availability.
TQFN (5mm x 5mm)
*EXPOSED PAD.
SEE PIN DESCRIPTION FOR CONNECTION.
Typical Operating Circuit appears at end of data sheet.
________________________________________________________________ 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.