The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) are low-power, single-supply devices that operate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply.
The MAX7400, MAX7403, MAX7404 and MAX7407 are 8th‑order low‑pass elliptic switched‑capacitor filters that operate from a single +5 V (MAX7400/MAX7403) or +3 V (MAX7404/MAX7407) supply. They draw about 2 mA in normal operation and feature a shutdown mode that reduces current to 0.2 pA, making them suitable for low‑power anti‑aliasing and post‑DAC filtering.
The datasheet provides absolute maximum ratings, electrical characteristics, typical operating curves, pin descriptions, ordering information and harmonic‑distortion tables. It also explains dual‑supply operation, clocking options, and recommended external components for setting the internal oscillator frequency.
| Supply Voltage | +5 V (MAX7400/MAX7403) or +3 V (MAX7404/MAX7407) |
|---|---|
| Supply Current (operating mode) | 2 – 3.5 mA |
| Shutdown Current | 0.2 pA |
| Clock‑to‑Corner Ratio | 100:1 |
| Corner Frequency Range | 0.001 kHz – 10 kHz |
| Stopband Rejection (MAX7400/MAX7404) | 82 dB |
The MAX7400 operates from a single +5 V supply.
In shutdown mode the device draws only 0.2 pA of current.
The clock‑to‑corner ratio is 100 : 1.
Corner frequencies can be set from 0.001 kHz up to 10 kHz.