25 kHz Butterworth — the anti-aliasing workhorse
The MAX291ESA+T is an 8th-order Butterworth low-pass switched-capacitor filter with a cutoff frequency of 25 kHz. The Butterworth response gives maximally flat passband gain — no ripple to amplify noise before the roll-off, which matters when you are placing this ahead of a SAR ADC or after a DAC reconstruction stage.
Supply rails and signal swing
It runs from a single 4.75 V to 11 V supply, or split ±2.375 V to ±5.5 V. The dual-rail option lets the input and output swing around ground without a DC-bias network — useful when the upstream sensor or downstream ADC is already bipolar. The single filter channel means one 8-SOIC per signal path; budget one package per channel in your BOM.