MAX7408/MAX7411/MAX7412/MAX7415 are 5th-order lowpass elliptic switched-capacitor filters (SCFs) that operate from a single +5V (MAX7408/MAX7411) or +3V (MAX7412/MAX7415) supply. The devices draw only 1.2mA of supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications.
The MAX7408, MAX7411, MAX7412, and MAX7415 family provides 5th‑order elliptic low‑pass filters for anti‑aliasing and post‑DAC filtering in single‑supply systems. They operate from a single +5 V (MAX7408/MAX7411) or +3 V (MAX7412/MAX7415) supply and offer low noise, low distortion, and selectable clock‑tunable corner frequencies from 1 Hz to 15 kHz.
Key features include a 100:1 clock‑to‑corner frequency ratio, transition ratios of 1.6 (MAX7408/MAX7412) or 1.25 (MAX7411/MAX7415), stop‑band rejections of 53 dB or 37 dB respectively, and shutdown currents as low as 0.2 µA. The datasheet provides detailed pin descriptions, electrical characteristics, and typical operating curves.
| Clock‑to‑Corner Frequency Ratio | 100:1 |
|---|---|
| Corner‑Frequency Range | 0.001 kHz to 15 kHz |
| Power‑Supply Rejection Ratio (PSRR) | 70 dB |
All devices have a 100:1 clock‑to‑corner frequency ratio.
The MAX7411 has a transition ratio of 1.25, giving a steeper roll‑off.