4-Channel S-Video, CVBS Video Filter with Asynchronous CVBS Input

The MAX7447 4-channel, buffered video reconstruction filter is ideal for anti-aliasing and DAC-smoothing video applications or wherever analog video is reconstructed from a digital data stream (such as cable/satellite/terrestrial set-top boxes, DVD players, hard disk recorders (HDRs), and personal video recorders (PVRs)). This device operates from a single +5V supply and has a flat passband out to 5MHz with a stopband attenuation of 43dB at 27MHz. This makes it ideal for use with NTSC, PAL, and standard-definition digital TV (SDTV) video systems. Each output is capable of driving two standard 150Ω video loads.

The MAX7447 processes S-Video and CVBS video signals. The video output buffers have a fixed gain of +6dB. Each channel has high-frequency boost circuitry that provides picture sharpness with up to +1.2dB of gain boost without degradation in the stopband. The output video drivers can be disabled with an external pin.

The MAX7447 is available in a 14-pin TSSOP package with an exposed pad, and is specified over the -40°C to +85°C extended temperature range.

Applications

* Desktop Video Editors * Digital VCRs * DVD Players * Game Consoles * Set-Top Boxes/HDRs

* 4-Channel Filter and Buffer for S-Video and CVBS Signals

* Filter Response Ideal for NTSC, PAL, and Interlaced SDTV Video Signals

* 43dB (typ) Stopband Attenuation at 27MHz

* ±0.75dB (max) Passband Ripple Out to 5MHz

* Blanking Level Voltage on Output <1V

* Each Channel Drives Two 150Ω Video Loads

* +5V Single-Supply Voltage

* Small 14-Pin TSSOP Package