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FMS6408-11 PDF预览

FMS6408-11

更新时间: 2024-11-22 22:48:59
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 驱动器
页数 文件大小 规格书
9页 248K
描述
Triple Video Filter Driver for RGB and YUV Signals

FMS6408-11 数据手册

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www.fairchildsemi.com  
FMS6408  
Triple Video Filter Driver for RGB and YUV Signals  
Features  
Description  
• 7.6MHz 5th order RGB/YUV/YC CV filters  
• 50dB stopband attenuation at 27MHz on all outputs  
• Better than 0.5dB flatness to 4.2MHz on all outputs  
• No external frequency selection components or clocks  
• AC coupled inputs and AC or DC coupled outputs  
• Supports both NTSC and PAL luminance bandwidth  
• Continuous time low pass filters for video anti-aliasing  
or reconstruction applications  
The FMS6408 provides three video signal paths including a  
two-input mux, a video filter and a 6dB gain output driver.  
The filter bandwidth supports RGB and YUV signals in  
either NTSC or PAL formats.  
The video filters approximate a 5th order Butterworth low  
pass characteristic optimized for minimum overshoot and  
flat group delay to provide excellent image quality. Four  
different peaking options are available. The video filters can  
be bypassed if desired.  
• <1% differential gain with 0.5° differential phase on  
all channels  
• Integrated DC restore circuitry with low tilt  
In a typical application, the RGB or YUV DAC outputs are  
AC coupled into the filters through the input mux. All  
channels have DC restore circuitry to clamp the DC input  
levels during video sync. The clamp pulse derived from the  
selectedY input controls three independent feedback clamps.  
All outputs are capable of driving 2Vpp, AC or DC coupled,  
into either a single (150) or dual (75) video load. The  
FMS6408 clamp levels can be factory programmed forYUV  
/RGB (250mV for all channels), YC / YPbPr (250mV on  
channel 1 and 1.125V on channels 2 and 3) or YC CV  
(250mV on channels 1 and 3 and 1.125V on channel 2).  
Applications  
• Cable set top boxes  
• Satellite set top boxes  
• Terrestrial set top boxes  
• DVD players  
• Personal Video Recorders (PVR)  
• Video On Demand (VOD)  
Functional Block Diagram  
INMUX (A/B)  
BYPASS (BYPASS/FILTER)  
Y
Y
OUT  
6dB  
INA  
8MHz  
*
Y
INB  
gM  
250mV  
Sync Processing  
U
U
OUT  
6dB  
INA  
INB  
8MHz  
*
U
gM  
250mV or  
1.125V *  
V
V
V
OUT  
6dB  
INA  
INB  
8MHz  
*
gM  
250mV or  
1.125V *  
* Factory Selected Clamp  
and Peaking Levels  
REV. 2C August 31, 2004  

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