MAX274BC/D

Overview

The MAX274BC/D is a family of fourth- and eighth-order continuous-time active filters manufactured by Analog Devices Inc./Maxim Integrated. These devices integrate four second-order sections to realize complex filter responses, including low-pass, band-pass, high-pass, and notch configurations. The circuit utilizes external capacitors to set the center frequency, which can be tuned via an external voltage or resistor. Operating on a single 5V supply, the MAX274 supports a maximum cutoff frequency of 150 kHz. It is available in industrial temperature ranges and housed in a 28-pin SO-Wide package.

Feature Summary

• Integrates four second-order biquad sections for flexible filter topology implementation
• Enables electronic tuning of center frequency through external control signals
• Supports multiple filter characteristics such as Chebyshev, Bessel, and Butterworth

Applications

• Multichannel telemetry systems requiring signal conditioning
• Instrumentation amplifiers with integrated anti-aliasing filtering
• Data acquisition front-ends for noise reduction

Procurement Notes

Verify the specific suffix (B or D) against the manufacturer's current production status, as availability may vary. Confirm that the required tolerance and temperature grade match the design specifications before ordering. Ensure the 28-pin SO-Wide package footprint aligns with the PCB layout constraints.

Selection Notes

Select the MAX274 variant based on the required order of filtering and the specific frequency response curve needed for the application. Evaluate the external capacitor values to ensure they fit within standard component tolerances while achieving the desired center frequency. Consider the power supply rejection ratio and input dynamic range relative to the signal source.

Part Context

This component belongs to the MAX274B series of continuous-time active filters. It serves as a versatile building block for analog signal processing, offering a compact alternative to discrete RC networks. The device simplifies the design of multi-pole filters by integrating the necessary operational amplifiers and switching elements on a single die.

Replacement Considerations

The MAX275AEPP is a documented related part within the same product family, offering similar continuous-time filtering capabilities. Designers should verify pin compatibility and electrical parameter equivalence when considering substitution.