ML6427

August 1999 PRELIMINARY ML6427 75W Quad Video Cable Drivers and Filters with Switchable Inputs GENERAL DESCRIPTION The ML6427 is a quad 4th-order Butterworth lowpass reconstruction filter plus quad video amplifier optimized for minimum overshoot and flat group delay. Each filter channel has a two-input multiplexer that switches between two groups of quad video signals. Applications driving SCART and EVC cables are supported for composite, component, and RGB video. 1VP-P input signals from DACs are AC coupled into the ML6427 where they are DC restored. Outputs are AC coupled and drive 2VP-P into a 150W load. The ML6427 can provide DC coupled outputs for certain applications. A fifth unfiltered channel is provided to support an additional analog composite video input. A swapping multiplexer between the two composite channels allows the distribution amplifiers to output from either input. Several ML6427s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs. FEATURES s Cable drivers for Peritel (SCART), Enhanced Video Connector (EVC), and standard video connectors, 75W cable drivers for CV, S-video, and RGB 7.1MHz CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux Quad reconstruction filter or dual anti-aliasing filter 43dB stopband attenuation at 27MHz 1dB flatness up to 4.8MHz 12ns group delay flatness up to 10MHz 0.4% differential gain, 0.4º differential phase on all channels 0.4% total harmo...