The FMS6646 Low Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost integrated device. Six Butterworth filters provide improved image quality compared to typical passive solutions. The combination of low-power Standard-Definition (SD) and High-Definition (HD 1080p) filters greatly simplifies DVD video output circuitry. Three channels offer fixed SD filters, while the other three are selectable between SD and HD filters.

The FMS6646 offers a fixed gain of 6dB.

The FMS6646 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 the Applications Information section for details).

The outputs can drive AC- or DC-coupled single (150W) video loads. DC-coupling the outputs removes the need for output coupling capacitors. The input DC levels are offset approximately +280mV at the output.

• Three Selectable 8/75MHz (SD/HD) Filters
• Three Fixed 8MHz (SD) Filters
• Transparent Input Clamping
• Single Video Load Drive (2V_PP, 150W, A_V = 6dB)
• AC- or DC-Coupled Inputs
• AC- or DC-Coupled Outputs
• DC-Coupled Outputs Eliminate AC-Coupling Capacitors
• Low-Power
• Robust Output ESD Protection: 9kV HBM

• Cable and Satellite Set-Top Boxes
• DVD Players
• HDTV
• Personal Video Recorders (PVR)
• Video On Demand (VOD)