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MAX7473

更新时间： 2024-11-27 04:41:43
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19页 277K
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HDTV Anti-Aliasing Filters with Triple-Input Mux

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19-0619; Rev 0; 8/06  
HDTV Anti-Aliasing Filters with Triple-Input Mux  
2/MAX473  
General Description  
Features  
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  
ꢀ 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  
component video (Y P P , GsBR, and RGBHV) as well  
B
R
480i, 480p, 720p, 1080i  
QVGA, VGA, SVGA, XGA, SXGA, UXGA  
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.  
Y P P , GsBR, RGBHV, Y/C, CVBS  
B
R
ꢀ 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  
The MAX7472/MAX7473 drive a 2V  
video signal into  
P-P  
ꢀ Single +5V Analog and +3.3V Digital Supplies  
ꢀ 5mW Power-Down Mode  
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.  
ꢀ Lead (Pb)-Free 28-Pin TQFN Package  
Ordering Information  
BUFFER  
GAIN (dB)  
PART  
PIN-PACKAGE PKG CODE  
MAX7472UTI+  
28 TQFN-EP*  
T2855-8  
T2855-8  
0
Applications  
MAX7473UTI+** 28 TQFN-EP*  
+6  
Note: All devices are specified over the 0°C to +85°C operat-  
HDTV (LCD, PDP, DLP, CRT)  
Set-Top Boxes  
ing temperature range.  
+Indicates lead-free packaging.  
*EP = Exposed pad.  
Personal Video Recorders  
Home Theaters  
**Future product—contact factory for availability.  
Pin Configuration  
TOP VIEW  
21 20 19 18 17 16 15  
14  
13  
AV  
22  
A0 23  
SCL  
DD  
SYNCC  
12 SYNCB  
24  
25  
26  
27  
28  
A1  
Typical Operating Circuit appears at end of data sheet.  
SYNCA  
DGND  
INC3  
11  
10  
9
MAX7472  
MAX7473  
AGND  
AGND  
INA1  
EP*  
+
8
INB3  
INB1  
1
2
3
4
5
6
7
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.  
1234567...19

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 		Switching Controller, Current-mode, 3A, 100kHz Switching Freq-Max, CMOS, PDSO14, 0.150 INC
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 		SWITCHING CONTROLLER, 100kHz SWITCHING FREQ-MAX, PDSO14, 0.150 INCH, PLASTIC, SO-14

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