MAX281AEWE+

Overview

The MAX281AEWE+ is a fifth-order zero-error Bessel low-pass switch-capacitor filter manufactured by Analog Devices Inc./Maxim Integrated. It operates within a single supply voltage range of 4.5 V to 5.5 V and supports dual supplies up to ±2.75 V. The device features a cutoff frequency of 20 kHz with a maximum clock frequency of 200 kHz. It provides a passband ripple of 0.01 dB and achieves high attenuation of 60 dB at twice the cutoff frequency. The component is housed in a 16-pin SOIC-Wide package and functions without requiring external capacitors.

Feature Summary

• Implements a fifth-order Bessel transfer function for linear phase response
• Utilizes switch-capacitor architecture eliminating external passive components
• Provides zero-error performance through internal calibration mechanisms

Applications

• Anti-aliasing filtering in data acquisition systems
• Signal conditioning for analog-to-digital converter inputs
• Noise reduction in precision measurement instrumentation

Procurement Notes

Verify the specific suffix 'A' against official manufacturer documentation to confirm temperature grade and electrical specifications. Confirm current availability status as legacy products may be discontinued or subject to limited production runs. Ensure compatibility with existing PCB footprints for the SOIC-Wide-16 package during sourcing.

Selection Notes

Select this component when a Bessel response is required to preserve signal waveform integrity. Verify that the system clock frequency can support the 200 kHz maximum requirement. Ensure the operating environment remains within the specified commercial temperature range of 0°C to +70°C for this specific variant.

Part Context

This part belongs to the MAX281 family of active filters, which are designed for applications requiring precise analog signal processing without bulky external inductors or capacitors. The series integrates the filter functionality into a compact semiconductor solution, simplifying board layout and reducing overall system size compared to discrete implementations.

Replacement Considerations

Publicly confirmed substitute part numbers for the MAX281AEWE+ were not identified in available documentation. Evaluate other members of the MAX281 family or similar switch-capacitor filter families only after verifying pinout and electrical parameter compatibility.