The MAX7428/MAX7430/MAX7432A filters are low-cost, high-performance replacements for standard discrete filter and buffer solutions. They are ideal for anti-aliasing and DAC smoothing video applications, when analog video is reconstructed from a digital data stream. These devices require a single +5V supply and the filters have a cutoff frequency optimized for NTSC, PAL, and standard definition digital TV (SDTV) video signals. The MAX7428/MAX7430/MAX7432A feature Maxim’s single-pin bus (MSPB™) interface to digitally control channel selection (IN_A or IN_B), adjust high-frequency boost, bypass the filter, configure luma vs. chroma operation, and control the output disable. The MAX7428 single-channel filter is ideal for composite (CVBS) video signals. The MAX7430 dual filter is optimized for S-Video (Y/C) applications. The MAX7432A triple filter is optimized for component (YPbPr or embedded synchronous RGB) video signals. The MAX7428 is available in a tiny 8-pin SOT23 package, the MAX7430 is available in a miniature 10-pin µMAX® package, and the MAX7432A is available in a 14-pin TSSOP package. The MAX7428/MAX7430/MAX7432A are fully specified over the -40°C to +85°C extended temperature range.
The MAX7428/MAX7430/MAX7432A family provides low‑cost, high‑performance video reconstruction filters and buffers for standard‑definition video signals. They operate from a single +5 V supply and are specified over a –40 °C to +85 °C temperature range. The devices support NTSC, PAL, and SDTV video standards and drive two 150 Ω video loads with a 6th‑order low‑pass filter.
Key features include a Maxim Single‑Pin Bus (MSPB) digital control interface, four programmable high‑frequency boost levels, selectable filter bypass, and three package options (8‑pin SOT23, 10‑pin µMAX, 14‑pin TSSOP). Applications cover set‑top boxes, DVD players, hard‑disk recorders, camcorders, and other consumer video equipment.
| Supply Voltage | +5 V ±10 % |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Output Load Capability | Drives two 150 Ω video loads |
| Filter Order | 6th‑order low‑pass |
| High‑Frequency Boost Levels | Four programmable levels |
They operate from a single +5 V supply.
The output buffer can drive two 150 Ω video loads.
Control is provided via Maxim’s Single‑Pin Bus (MSPB) interface.
The filters are optimized for NTSC, PAL, and standard‑definition digital TV (SDTV).