FMS6410

The FMS6410 Dual Channel Video Filter Driver Chip with CV Summer offers comprehensive video filtering for set top box or DVD applications. This part consists of two 4th order Butterworth 7.1MHz low pass filters for video signals. The filters are optimized for low overshoot and flat group delay. The FMS6410 also contains a summing circuit to generate filtered composite video. Integrated video drivers are included to facilitate a direct drive to the outside world.

In FMS6410 application, the Y and C input signals from DACs are AC coupled into the filter. Both channels have DC restore circuitry to clamp the DC input levels during video sync. The Y and C channels use a separate feedback clamp. The clamp pulse is derived from the Y channel. The outputs of FMS6410 are AC coupled. The Y, C and, CV outputs are buffered to drive 2VP-P into a 150 load (1VP-P into a doubly terminated 75 coax load) with up to 35pF of load capacitance at the output pin. The Y, C, and CV channels have a gain of approximately 2 (6dB) with 1VP-P input levels. There is an option for the video output to be DC coupled which limits the drive output to one output on each channel.