The MAX7401/MAX7405 8th-order, lowpass, Bessel, switched-capacitor filters operate from a single +5V (MAX7401) or +3V (MAX7405) supply. These devices draw only 2mA of supply current and allow cor- ner frequencies from 1Hz to 5kHz, making them ideal for low-power post-DAC filtering and anti-aliasing appli- cations.
The MAX7401 and MAX7405 are 8th‑order low‑pass Bessel switched‑capacitor filters that operate from a single +5 V (MAX7401) or +3 V (MAX7405) supply. They draw only a few milliamps in normal mode and feature a shutdown mode that reduces supply current to 0.2 µA, making them suitable for low‑power post‑DAC filtering and anti‑aliasing applications.
The document provides absolute maximum ratings, electrical characteristics, pin descriptions, typical operating curves, clocking options, and package information. It also includes application notes such as offset adjustment, input impedance considerations, and recommended external clock usage.
| Supply Voltage | +5 V (MAX7401) / +3 V (MAX7405) |
|---|---|
| Supply Current (Operating Mode) | 2 mA |
| Shutdown Current | 0.2 µA |
| Clock‑to‑Corner Ratio | 100:1 |
| Output Voltage Range | 0.25 Vpp – 0.25 V |
The MAX7401 operates from a single +5 V supply.
In shutdown mode the device draws about 0.2 µA.
Both parts are offered in 8‑pin SO or DIP packages.