Filter function and board-fit
The MAX280EWE+ is a 5th-order Butterworth low-pass switched-capacitor filter from Analog Devices, delivering a 20 kHz cutoff frequency in a single-filter configuration. The Butterworth response provides maximally flat passband gain — no ripple — making it a clean choice for anti-aliasing or reconstruction in precision analog signal chains where in-band amplitude flatness matters more than a sharp roll-off. Housed in a 16-SOIC wide-body package (7.50 mm width), the part mounts on standard surface-mount pads with a 1.27 mm pitch. The supply range spans 4.75 V to 16 V single-supply or ±2.375 V to ±8 V dual-supply, so it fits into both single-rail and split-rail designs without extra level shifting.
Supply voltage and signal-chain integration
The wide supply window — 4.75 V to 16 V single, or ±2.375 V to ±8 V dual — lets the filter sit directly on a ±5 V analog rail or a 12 V industrial supply without a dedicated regulator. The 20 kHz cutoff is set by an external clock or a capacitor; the switched-capacitor architecture locks the corner frequency to the clock, so the filter tracks the clock tolerance across temperature.