Rainbow Electronics MAX7470 - Manual

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 s BR, 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 I
2 C* 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
Features
♦ Continuously Variable Anti-Aliasing Filter
5MHz to 34MHz in 256 Steps
♦ 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 s BR, 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 (MAX7469)
+6dB (MAX7470)
♦ DC- or AC-Coupled Outputs
♦ Single +5V Analog and +3.3V Digital Supplies
♦ 5mW Power-Down Mode
♦ 20-Pin TQFN Lead-Free Package
MAX7469/MAX7470
PART PIN-PACKAGE
BUFFER
GAIN (dB)
PKG
CODE
M A X7 4 6 9 U TP + 20 TQFN-EP* 0 T2055-4
M A X7 4 7 0 U TP + ** 20 TQFN-EP* +6 T2055-4
Ordering Information
19-0548; Rev 0; 5/06
HDTV Continuously Variable
Anti-Aliasing Filters
Typical Operating Circuit appears at end of data sheet.
* Purchase of I 2 C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associate Companies, conveys a
license under the Philips I
2 C Patent Rights to use these compo-
nents in an I 2 C system, provided that the system conforms to the
I 2 C Standard Specification defined by Philips.
________________________________________________________________ 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.
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.
Pin Configuration
MAX7469
MAX7470
TQFN (5mm x 5mm)
*EXPOSED PAD.
SEE PIN DESCRIPTION FOR CONNECTION.
TOP VIEW
19
20
18
17
7
6
8
EXTSYNC
SDA
DV
DD
9
DGND
GND A0 AV
DD
GND
1 2
IN2
4 5
15 14 12 11
GND
IN3
AV DD
OUT2
AV DD
OUT3
SCL
A1
3
13
GND
16 10 OUT1 IN1
+ *EP