MAX280EWE+

Overview

The MAX280EWE+ is a fifth-order zero-error Butterworth low-pass switch-capacitor filter manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 5V supply and features an SO-Wide-16 package. The device provides a cutoff frequency of 20kHz with a passband ripple of 0.01dB and stopband attenuation of 70dB at the specified frequency. Key electrical parameters include a maximum input signal level of 3V peak-to-peak, a power supply rejection ratio of 70dB, and a quiescent current of 4mA. The component supports a clock frequency range from 50kHz to 400kHz.

Feature Summary

• Implements a fifth-order Bessel-Thomson response for linear phase characteristics
• Utilizes switch-capacitor architecture for precise frequency control
• Features external clock pin for flexible timing configuration
• Provides high power supply rejection to minimize noise interference

Applications

• Anti-aliasing filtering in data acquisition systems
• Signal conditioning for analog-to-digital converters
• Precision instrumentation front-ends requiring linear phase
• Biomedical signal processing circuits

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer documentation. Check for obsolescence notices or lifecycle changes before finalizing procurement plans. Ensure compatibility with existing board layouts regarding the SOIC-16 footprint.

Selection Notes

Select this component when a sharp roll-off with minimal phase distortion is required. Compare cutoff frequencies against system sampling rates to prevent aliasing. Evaluate clock source stability as it directly impacts filter performance. Consider alternative orders if higher cutoff frequencies are needed.

Part Context

This part belongs to the MAX280 family of active filters designed for precision applications. It replaces older discrete RC networks with integrated switch-capacitor solutions. The series offers various cutoff frequencies and order configurations. It is commonly used in industrial control and measurement equipment.

Replacement Considerations

MAX280CWE+ serves as a direct functional replacement within the same family. Verify pinout compatibility and parameter alignment before substitution. Consult official cross-reference guides for confirmed equivalents.