FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
March 2008
FMS6143
Low-Cost Three-Channel 4th-Order
Standard Definition Video Filter Driver
Features
■
Three 4th-order 8MHz (SD)
fi
lters
■
Drives single, AC- or DC-coupled, video loads (2V
pp
, 150Ω)
■
Drives dual, AC- or DC-coupled, video loads (2V
pp
, 75Ω)
■
Transparent input clamping
■
AC- or DC-coupled inputs
■
AC- or DC-coupled outputs
■
DC-coupled outputs eliminate AC-coupling capacitors
■
5V only
■
Robust 8kV ESD protection
■
Lead-free SOIC-8 package
Description
The FMS6143 Low-Cost Video Filter (LCVF) is intended
to replace passive LC
fi
lters and drivers with a low-cost
integrated device. Three 4th-order
fi
lters provide improved
image quality compared to typical 2nd or 3rd-order
passive solutions.
The FMS6143 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) or
dual (75Ω) loads. DC-coupling the outputs removes the
need for output coupling capacitors. The input DC-levels
are offset approximately +280mV at the output (see the
Applications
section for details).
Applications
■
Cable set-top boxes
■
Satellite set-top boxes
■
DVD players
■
HDTV
■
Personal Video Recorders (PVR)
■
Video On Demand (VOD)
Related Application Notes
AN-8002 — FMS6418B 4:2:2 Application Note
AN-6024 — FMS6xxx Product Series Understanding
Analog Video Signal Clamps, Bias, DC-
Restore, and AC or DC Coupling Methods
AN-6041 — PCB Layout Considerations for Video
Filter / Drivers
Functional Block Diagram
IN1
Transparent Clamp
6d
B
OUT1
IN2
Transparent Clamp
6d
B
OUT2
IN3
Transparent Clamp
6d
B
OUT3
8MHz, 4th-order
Figure 1. AC-Coupled Inputs and Outputs
Ordering Information
Part Number
FMS6143CS
FMS6143CSX
Package
SOIC-8
SOIC-8
Pb-Free
Yes
Yes
Operating
Temperture Range
-40 to +85°C
-40 to +85°C
Packaging
Method
Tube
Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
