FMS6141 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver

November 2006
FMS6141
Low-Cost, Single-Channel 4^th-Order
Standard Definition Video Filter Driver
Features
ƒ Single 4th-Order 8MHz (SD) Filter
ƒ Drives Single, AC- or DC-coupled, Video Loads
(2V_pp, 150Ω)
ƒ Drives Dual, AC- or DC-coupled, Video Loads
(2V_pp, 75 Ω)
ƒ Transparent Input Clamping
ƒ AC- or DC-Coupled Input
ƒ AC- or DC-Coupled Output
ƒ DC-Coupled Output Eliminates AC-Coupling
Capacitors
ƒ Single Supply
ƒ Robust 10kV ESD Protection
ƒ Lead-Free Packages: SOIC-8 or SC70-5
Applications
ƒ Cable Set-Top Boxes
ƒ Satellite Set-Top Boxes
ƒ DVD Players
ƒ HDTVs
ƒ Personal Video Recorders (PVR)
ƒ Video On Demand (VOD)
Description
The FMS6141 Low-Cost Video Filter is intended to
replace passive LC filters and drivers with a low-cost
integrated device. The 4th-order filter provides improved
image quality compared to typical 2nd or 3rd-order
passive solutions.
The FMS6141 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 an AC-coupled
input is required (see Application Information for details).
The FMS6141’s output can drive an AC- or DC-coupled
single (150 Ω) or dual (75 Ω) load. DC-coupling the
output removes the need for output coupling capacitors.
The input DC level is offset approximately +280mV at
the output (see Application Information for details).
Related Applications Notes
ƒ AN-6041 PCB Layout Considerations for Video
Filter / Drivers
ƒ AN-6024 FMS6xxx Product Series Understanding
Analog Video Signal Clamps, Bias, DC-Restore,
and AC or DC Coupling Methods
Functional Block Diagram
VIDEOIN
Transparent Clamp
2X
VIDEOOUT
8MHz, 4th-order
Figure 1. FMS6141 Block Diagram
© 2006 Fairchild Semiconductor Corporation
FMS6141 Rev. 1.0.0
www.fairchildsemi.com