In the application notes, Fairchild describes the evaluation board : The FMS6143 evaluation board provides a flexible base for evaluating the performance of the FMS6143. The board operates from a standard supply voltage of +5V ± 5%. 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 and 3rd order passive solutions. Applications are for cable set top boxes, satellite set top boxes, DVD players, HDTV, personal video recorders, and video on demand.

fairchild semiconductor FMS 6143 evaluation board block diagram

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. The outputs can drive AC or DC-coupled single (150
?) or dual (75 ?) loads. DC coupling the output removes the need for output coupling capacitors. The input DC levels will be offset approximately +280mV at the output. The FMS6143 Low Cost Video Filter (LCVF) provides 6dB gain from input to output. In addition, the input will be slightly offset to optimize the output driver performance. The FMS6143 provides an internal diode clamp to support AC-coupled input signals. If the input signal does not go below ground, the input clamp will not operate. This allows DAC outputs to directly drive the FMS6143 without and AC coupling capacitor (usually 220 ?F). The offset is held to the minimum required value to decrease the standing DC current into the load.

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Fairchild Semiconductor FMS6143 Evaluation Board Application Notes pdf Download

[source : fairchildsemi.com]