The MAX7445 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/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 MAX7445 is a 4‑channel, buffered video reconstruction filter and buffer designed for CVBS, RGB, or Y/C video signals. It provides anti‑aliasing and DAC‑smoothing for analog video reconstructed from digital streams such as set‑top boxes, DVD players, and digital VCRs. The device operates from a single +5 V supply, offers a flat passband to 5 MHz, and a typical stopband attenuation of 43 dB at 27 MHz. Each channel can drive two 150 Ω video loads and includes selectable gain (+6 dB, +9.5 dB, +12 dB) and optional high‑frequency boost.
The datasheet includes electrical characteristics, pin descriptions, package information (14‑pin TSSOP‑EP), and operating temperature range of –40 °C to +85 °C. Three operating modes allow processing of different video signal combinations, and the device includes a disable pin for high‑impedance output control. Applications cover set‑top boxes, DVD players, digital VCRs, and other SDTV video systems.
| Supply Voltage | +5 V |
|---|---|
| Gain Settings | +6 dB, +9.5 dB, +12 dB |
| Passband | Flat out to 5 MHz |
| Stopband Attenuation | 43 dB at 27 MHz (typ) |
| Package | 14‑pin TSSOP‑EP |
| Operating Temperature Range | -40 °C to +85 °C |
| Number of Channels | 4 |
The MAX7445 operates from a single +5 V supply.
Gain can be set to +6 dB, +9.5 dB, or +12 dB via the GAIN pin.
The stopband attenuation is 43 dB (typical) at 27 MHz.