The MAX7446 is a 4-channel, buffered video reconstruction filter ideal for anti-aliasing and DAC-smoothing video applications or wherever analog video is reconstructed from a digital data stream (such as cable/satellite/ter- restrial 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 MAX7446 processes CVBS and RGB video signals. The video output buffers have a fixed gain of +6dB. The channel for CVBS video has high-frequency boost circuitry that provides picture sharpness with +1.2dB of gain boost without degradation in the stopband. The output video drivers can be disabled with an external pin. The MAX7446 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: Set-Top Boxes/HDRs Game Consoles Desktop Video Editors DVD Players Digital VCRs
The MAX7446 provides four independent channels for processing CVBS and RGB video signals. Each channel includes a low‑pass filter and a video buffer with a fixed gain of +6 dB, capable of driving two 150 Ω video loads. The device operates from a single +5 V supply, offers a flat passband to 5 MHz, and achieves 43 dB stopband attenuation at 27 MHz. A high‑frequency boost of +1.2 dB is available on channel A to improve picture sharpness.
The part is supplied in a 14‑pin TSSOP‑EP package and is specified for operation over –40 °C to +85 °C. Typical application areas include set‑top boxes, hard‑disk recorders, DVD players and other video‑encoder DAC outputs where analog video reconstruction is required.
| Supply Voltage | +5 V |
|---|---|
| Passband | Flat to 5 MHz |
| Stopband Attenuation | 43 dB at 27 MHz (typ) |
| Package | 14‑pin TSSOP‑EP |
| Operating Temperature Range | –40 °C to +85 °C |
| Output Gain | +6 dB |
| Load Capability per Output | Two 150 Ω video loads |
| High‑Frequency Boost (Channel A) | +1.2 dB |
It operates from a single +5 V supply.
Each output can drive two standard 150 Ω video loads.
The stopband attenuation is 43 dB (typ) at 27 MHz.
Channel A provides a +1.2 dB high‑frequency boost.