FMS6408_07 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – Precision Triple Video Filter Driver for RGB and YUV Signals

October 2007
FMS6408
Precision Triple Video Filter Driver for RGB and YUV Signals
Features
ƒ 7.6MHz 5th order RGB/YUV/YC CV filters
ƒ 50dB stopband attenuation at 27MHz on all outputs
ƒ Better than 0.5dB flatness to 4.2MHz on all outputs
ƒ No external frequency selection components or
clocks
ƒ AC coupled inputs and AC or DC coupled outputs
ƒ Supports both NTSC and PAL luminance
bandwidth
ƒ Continuous time, low-pass filters for video anti-
aliasing or reconstruction applications
ƒ <1% differential gain with 0.5° differential phase on
all channels
ƒ Integrated DC restore circuitry with low tilt
Applications
ƒ Cable Set-top Boxes
ƒ Satellite Set-top Boxes
ƒ Terrestrial Set-top Boxes
ƒ DVD Players
ƒ Personal Video Recorders (PVR)
ƒ Video-On-Demand (VOD)
Description
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 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.
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 selected Y input controls three independent
feedback clamps. All outputs are capable of driving
2Vpp, AC or DC coupled, into either a single (150Ω) or
dual (75Ω) video load. The FMS6408 clamp levels can
be factory programmed for YUV / 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).
Ordering Information
Part Number
Clamping
Mode
Peaking
Mode
(dB)
YOUT
Level
(mV)
FMS6408MTC141 YPbPr/YC
0
250
FMS6408MTC141X YPbPr/YC
0
250
FMS6408MTC142 YPbPr/YC
0.4
250
FMS6408MTC143 YPbPr/YC
0.9
250
FMS6408MTC143X YPbPr/YC
0.9
250
© 2004 Fairchild Semiconductor Corporation
FMS6408 Rev. 3.0.0
UOUT
Level
(V)
1.125
1.125
1.125
1.125
1.125
Package
Packing
Method
14-Lead, Thin Shrink Small Outline
Package (TSSOP)
14-Lead, Thin Shrink Small Outline
Package (TSSOP)
14-Lead, Thin Shrink Small Outline
Package (TSSOP)
14-Lead, Thin Shrink Small Outline
Package (TSSOP)
14-Lead, Thin Shrink Small Outline
Package (TSSOP)
94 Units Tube
2500 Units
Tape and Reel
94 Units Tube
94 Units Tube
2500 Units
Tape and Reel
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