FMS6143_08 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – Low-Cost Three-Channel 4th-Order Standard Defi nition Video Filter Driver

FMS6143
Low-Cost Three-Channel 4th-Order
Standard Definition Video Filter Driver
March 2008
Features
■ Three 4th-order 8MHz (SD) filters
■ 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
Applications
■ Cable set-top boxes
■ Satellite set-top boxes
■ DVD players
■ HDTV
■ Personal Video Recorders (PVR)
■ Video On Demand (VOD)
Description
The FMS6143 Low-Cost Video Filter (LCVF) is intended
to replace passive LC filters and drivers with a low-cost
integrated device. Three 4th-order filters 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).
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
6dB
OUT1
IN2
Transparent Clamp
6dB
OUT2
IN3
Transparent Clamp
6dB
8MHz, 4th-order
OUT3
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
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
Packaging
Method
Tube
Tape and Reel
www.fairchildsemi.com