The MAX291/MAX292/MAX295/MAX296 are easy-to-use, 8th-order, lowpass, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25kHz (MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296).
The MAX291, MAX292, MAX295 and MAX296 are 8th‑order low‑pass switched‑capacitor filters offered in Butterworth (MAX291/295) and Bessel (MAX292/296) configurations. They provide clock‑tunable corner‑frequency ranges of 0.1 Hz to 25 kHz (MAX291/292) or 0.1 Hz to 50 kHz (MAX295/296) and require no external resistors or capacitors.
These devices can be powered from a single +5 V supply or dual ±5 V supplies, are available in 8‑pin DIP, 8‑pin SO and 16‑pin wide‑SO packages, and include an uncommitted op‑amp for anti‑aliasing or post‑filtering applications.
| Filter order | 8th‑order |
|---|---|
| Corner‑frequency range (MAX291/292) | 0.1 Hz to 25 kHz |
| Clock‑to‑corner‑frequency ratio | 100:1 (MAX291/292), 50:1 (MAX295/296) |
| Package types | 8‑Pin DIP, 8‑Pin SO, 16‑Pin Wide SO |
| Maximum clock frequency | 2.5 MHz |
The maximum recommended clock frequency is 2.5 MHz, which yields the highest corner frequencies of 25 kHz for MAX291/292 and 50 kHz for MAX295/296.
Yes, they can operate from a single +5 V supply or from dual ±5 V supplies.
They are offered in 8‑pin DIP, 8‑pin SO and 16‑pin wide SO packages.