MAX281AEWE+T

Overview

The MAX281AEWE+T is a fifth-order zero-error Bessel low-pass active filter manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a switched-capacitor architecture to provide precise frequency response characteristics without the gain peaking associated with standard Bessel filters. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 200kHz, enabling a cutoff frequency up to 20kHz. It is housed in a 16-lead SOIC-Wide package and is rated for operation over an industrial temperature range of -40°C to +85°C.

Feature Summary

• Fifth-order Bessel low-pass filtering with zero-error correction for linear phase response
• Switched-capacitor design allowing programmable cutoff frequencies via external clock
• Single-supply operation compatible with standard logic levels

Applications

• Anti-aliasing filtering in data acquisition systems
• Signal conditioning for analog-to-digital converters
• Noise reduction in precision sensor interfaces

Procurement Notes

Verify the specific suffix AEWE+T against official Analog Devices documentation to confirm package type and temperature grade. Confirm RoHS compliance status as indicated by the plus sign. Check current availability through authorized distributors, as older Maxim products may have limited stock or obsolescence risks.

Selection Notes

Select this component when a strict Bessel response is required for minimal overshoot in transient signals. Ensure the application can provide a stable clock signal, as performance depends on the clock-to-cutoff ratio. Compare pin compatibility with other MAX281 variants if space constraints exist.

Part Context

This part belongs to the MAX281 family of zero-error Bessel filters. It shares functional similarities with MAX281BCWE+ and MAX281BEWE+, differing primarily in temperature rating and package configuration. The series is designed for applications requiring high linearity and predictable group delay.

Replacement Considerations

Direct substitutes include MAX281BCWE+ and MAX281BEWE+. Verify that the alternative variant meets the required operating temperature range (-40°C to +85°C) and package dimensions before integration.