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FMS6690 Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part No. FMS6690
Description  Six Channel, 6th Order SD/PS/HD Video Filter Driver
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FMS6690 Datasheet(HTML) 1 Page - Fairchild Semiconductor

 
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FMS6690 Rev. 2A
1
www.fairchildsemi.com
July 2005
FMS6690
Six Channel, 6th Order SD/PS/HD Video Filter Driver
Features
■ Three selectable sixth-order 15/32MHz (PS/HD) filters
■ Three fixed sixth-order 8MHz (SD) filters with muxed input
■ 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
■ Lead (Pb) Free packages - TSSOP-20
Applications
■ Cable and Satellite set top boxes
■ DVD players
■ HDTV
■ Personal Video Recorders (PVR)
■ Video On Demand (VOD)
Description
The FMS6690 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), Progressive Scan (PS),
and High Definition (HD) filters greatly simplify DVD video out-
put circuitry. Three channels offer fixed SD filters and feature an
additional muxed input, while the other three channels are
selectable between PS and HD filters. The FMS6690 offers a
fixed gain of 6dB.
The FMS6690 may be directly driven by a DC-coupled DAC out-
put or an AC-coupled signal. Internal diode clamps and bias cir-
cuitry may be used if AC-coupled inputs are required (see
applications section for details).
The outputs can drive AC or DC-coupled single (150
Ω) 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.
Block Diagrams
SD IN1
Selectable
15/32MHz
6th order
6d
B
Transparent Clamp
6d
B
Transparent Clamp
6d
B
Transparent Clamp
6d
B
Transparent Clamp
6d
B
Transparent Clamp
6d
B
Transparent Clamp
8MHz, 6th order
FcSEL PS / HD
SD IN2
SD IN3A
SD OUT1
SD OUT2
SD OUT3
PS/HD IN1
PS/HD IN2
PS/HD IN3
PS/HD OUT3
PS/HD OUT2
PS/HD OUT1
SD IN3B
MUXSEL A/B


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