FMS6346_08 Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – Six Channel, 6th-Order SD/HD Video Filter Driver

FMS6346
Six Channel, 6th-Order SD/HD Video Filter Driver
February 2008
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, 150Ω, 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-free package - TSSOP-20
Applications
■ Cable and satellite set-top boxes
■ DVD players
■ HDTV
■ Personal Video Recorders (PVR)
■ Video On Demand (VOD)
Description
The FMS6346 Low Cost Video Filter (LCVF) is intended
to replace passive LC filters and drivers with a low-cost
integrated device. Six sixth-order Butterworth filters pro-
vide improved image quality compared to typical passive
solutions. The combination of low-power Standard-Defini-
tion (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. 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 (150Ω)
video loads. DC-coupling the outputs removes the need
for output coupling capacitors. The input DC levels are
offset approximately +280mV at the output.
Ordering Information
Part Number
FMS6346MTC20
FMS6346MTC20X
Gain Option
6dB
6dB
Temperature
0°C to 70°C
0°C to 70°C
Package
TSSOP-20
TSSOP-20
All packages are lead free per JEDEC: J-STD-020B standard.
Container
Rail
Reel
Quantity
94
2500
© 2006 Fairchild Semiconductor
FMS6346 Rev. 1.0.4
SD IN1
SD IN2
SD IN3
SD/HD IN1
Transparent Clamp
6dB
Transparent Clamp
6dB
Transparent Clamp
6dB
8MHz, 6th order
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
6dB
Selectable
8/32MHz
6th order
SD/HD OUT3
Figure 1. Block Diagram
www.fairchildsemi.com