MAX281ACWE

Overview

The MAX281ACWE is a zero-error Bessel low-pass filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It is designed for applications requiring precise signal filtering with minimal phase distortion. The component operates within a supply voltage range of 4.5 V to 5.5 V and functions at temperatures from 0°C to +70°C. Key electrical parameters include a cutoff frequency of 1 MHz, a maximum passband ripple of 0.01 dB, and a stopband attenuation of 60 dB at 3 MHz. The device draws a typical supply current of 10 mA and features a single-ended input/output configuration.

Feature Summary

• Zero-error Bessel response for linear phase characteristics
• Integrated active filter design eliminating external components
• Low passband ripple for high-fidelity signal processing

Applications

• Anti-aliasing filters in data acquisition systems
• Signal conditioning for precision measurement equipment
• Audio processing circuits requiring flat group delay

Procurement Notes

Verify the specific suffix ACWE against the official datasheet to confirm package type and temperature grade. Confirm RoHS compliance status as manufacturing processes may change. Check for obsolescence notices or lifecycle status updates directly from Analog Devices before finalizing procurement plans.

Selection Notes

Select this component when a sharp Bessel response is required without external passive components. Ensure the operating environment stays within the specified commercial temperature range. Verify that the 1 MHz cutoff frequency aligns with the system bandwidth requirements to avoid signal degradation.

Part Context

The MAX281 series belongs to Maxim Integrated's family of integrated active filters. These devices replace traditional discrete RC networks, reducing board space and improving consistency. The ACWE variant specifically denotes the wide SOIC package suitable for surface-mount assembly in compact electronic designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices application notes for potential pin-compatible alternatives if the MAX281ACWE becomes unavailable.