MIC1700 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – HD TV / SD TV 6 TH ORDER VIDEO FILTER FOR COMPONENT

MIC1700
Micrel
MIC1700
HDTV/SDTV 6^th Order Video Filter for Component
Video plus Composite Video
General Description
The MIC1700 is a complete reconstruction filter solution for
high definition set-top boxes.
The device has two independent component inputs (YP_RP_B
or RGB) selectable via a 2-to-1 multiplexer, and a separate S-
video input (Y/C). Component channel filters have a select-
able cutoff frequency (8MHz or 36MHz) to support both
standard (SD) and high definition (HD) applications. S-video
filters have fixed cutoff (8MHz) to support legacy composite
applications. In addition, S-video channels are summed to
provide a filtered CV output for an RF modulator or VCR. All
inputs are DC-coupled with a 0V to 1V peak-to-peak range.
All outputs are designed to drive 2V peak-to-peak into
AC-coupled 150Ω loads. This supports 1V peak-to-peak into
a 75Ω load with a 75Ω series source terminator.
Filters have 6^th order near Butterworth characteristics with
cutoffs of 8MHz (SD and CV) and 36MHz (HD). These
characteristics are chosen to provide good passband flat-
ness with sufficient stop band attenuation and minimal group
delay distortion.
The device operates from a 5VDC supply.
Data sheets and support documentation are available at
Micrel’s web site, www.micrel.com.
Features
• S-video (Y/C) input, S-video and summed (CV) output
• 2 YP_RP_B or RGB inputs, YP_RP_B or RGB output
• YP_RP_B/RGB 2-1 input multiplexer
• DC coupled inputs – AC-coupled output drive
• 6db output gain for 75Ω source termination
• Component filters selectable for SD or HD cutoffs
• 6^th order Butterworth characteristic
• Flat passband (HD 0.5dB @ 30MHz typ)
• Low group delay distortion (HD: 12ns @ 30MHz typ)
• Single 5V supply
• 28-pin wide body SOIC package (with exposed pad for
improved thermal performance)
Applications
• HDTV
• HDTV set-top boxes
• Video games
• HDTV systems
• DVD players
• Digital satellite set-top boxes
• HDTV monitors
Ordering Information
Part Number Junction Temp. Range
MIC1700BWME
0°C to +70°C
Package
SOIC-28
Typical Application
HSEL
Y1A
Y1B
PR1
PR2
PB1
PB2
Composite ^YIN
Inputs _CIN
MUX
MIC1700x-x
1 _HSEL
2 _Y1A
3 _Y1B
4 _PR1
5 _PR2
6 _GND
7 _PB1
8 _PB2
9 _YIN
10 _CIN
11 _GND
12 _MUX
VCC ²⁸
VCC ²⁷
Y1OUT ²⁶
PROUT ²⁵
PBOUT ²⁴
GND ²³
YOUT ²²
COUT ²¹
CVOUT ²⁰
GND ¹⁹
VCC ¹⁸
GND ¹⁷
4.7µF
V_CC
0.1µF
220µF
75Ω
220µF
75Ω
220µF
75Ω
Y1OUT
75Ω
PROUT
75Ω
PBOUT
75Ω
220µF
75Ω
220µF
75Ω
220µF
75Ω
YOUT
75Ω
COUT
75Ω
CVOUT
75Ω
V_CC
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
October 2003
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MIC1700