MAX281BCWE

Overview

The MAX281BCWE+ is a zero-error Bessel low-pass filter integrated circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It is housed in a 16-pin SOIC-Wide package and operates within an industrial temperature range of 0°C to +70°C. The device functions as an active filter with a cutoff frequency of 1 MHz, providing a maximally flat group delay characteristic essential for preserving signal pulse shapes. It requires a single positive supply voltage ranging from 4.5 V to 36 V or dual supplies up to ±18 V. The component draws a maximum supply current of 500 µA and supports a maximum output current of 20 mA, making it suitable for precision analog signal conditioning applications.

Feature Summary

• Zero-error Bessel response ensures minimal phase distortion and constant group delay across the passband.
• Integrated active filter design eliminates the need for external passive components such as capacitors or inductors.
• Wide single or dual power supply operation accommodates various system voltage architectures.

Applications

• Precision data acquisition systems requiring high-fidelity signal conditioning
• Medical instrumentation where signal integrity and low distortion are critical
• Industrial process control loops utilizing sensor signals

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (0°C to +70°C) against the official datasheet. Confirm RoHS compliance status through the manufacturer's certification documents. Ensure the SOIC-Wide-16 package dimensions match the target PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 1 MHz Bessel filter response is required without external tuning. Compare against other MAX281 variants if different temperature grades or cutoff frequencies are needed. Verify that the input signal amplitude remains within the linear operating range defined by the supply voltage to prevent clipping.

Part Context

The MAX281 belongs to a family of zero-error active filters designed to replace complex discrete RC networks. It simplifies board space and reduces component count in analog front-end designs. The BCWE variant specifically denotes the commercial temperature range and surface-mount packaging format.

Replacement Considerations

Check for direct pin-compatible alternatives within the MAX281 series offering different cutoff frequencies. Verify functional equivalence with other Bessel filter ICs if supply chain constraints require substitution.