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Fairchild Semiconductor - 6th Order SD/HD Video Filter Driver

Numéro de référence FMS6346
Description 6th Order SD/HD Video Filter Driver
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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FMS6346 fiche technique
March 2006
FMS6346
Six Channel, 6th Order SD/HD Video Filter Driver
Features
Three selectable sixth-order 8/32MHz (SD/HD) filters
Three fixed sixth-order 8MHz (SD) filters
Transparent input clamping
Single video load drive (2Vpp, 150, AV = 6dB)
AC or DC-coupled inputs
AC or DC-coupled outputs
DC-coupled outputs eliminate AC-coupling capacitors
Low power
5V only
Robust (12kV HBM) output ESD protection
Lead (Pb) free packages - TSSOP-20
Applications
Cable and satellite set-top boxes
DVD players
HDTV
Personal Video Recorders (PVR)
Video On Demand (VOD)
Block Diagram
Description
The FMS6346 Low Cost Video Filter (LCVF) is intended to
replace passive LC filters and drivers with a low-cost integrated
device. Six 6th order Butterworth filters provide improved image
quality compared to typical passive solutions. The combination
of low power Standard Definition (SD) and High Definition (HD)
filters greatly simplify DVD video output circuitry. Three channels
offer fixed SD filters while the other three are selectable
between SD and HD filters.
The FMS6346 offers a fixed gain of 6dB. A metal option is available
that provides a fixed gain of 9dB, offering even more flexibility.
The FMS6346 may be directly driven by a DC-coupled DAC output
or an AC-coupled signal. Internal diode clamps and bias circuitry
may be used if AC-coupled inputs are required (see applications
section for details).
The outputs can drive AC or DC-coupled single (150) video
loads. DC-coupling the outputs removes the need for output
coupling capacitors. The input DC levels will be offset approxi-
mately +280mV at the output.
SD IN1
SD IN2
SD IN3
SD/HD IN1
Transparent Clamp
6dB
Transparent Clamp
6dB
Transparent Clamp
8MHz, 6th order
6dB
Transparent Clamp
6dB
SD OUT1
SD OUT2
SD OUT3
SD/HD OUT1
SD/HD IN2
Transparent Clamp
6dB SD/HD OUT2
SD/HD IN3
Transparent Clamp
SD/HD
Selectable
8/32MHz
6th order
6dB
SD/HD OUT3
FMS6346 Rev. 1B
1 www.fairchildsemi.com

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