MAX274ACWI+T

Overview

The MAX274ACWI+T is a fourth-order continuous-time active filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates on a single +5V supply with a cutoff frequency of 100kHz and features an SOIC-28 package. The device supports low-pass, band-pass, high-pass, and notch configurations via external components. It includes a clock input for frequency scaling and offers high linearity with low distortion. The AC suffix indicates an automotive-grade qualification variant within the MAX274 family.

Feature Summary

• Continuous-time architecture enabling real-time signal processing without sampling artifacts
• Configurable filter responses including low-pass, band-pass, high-pass, and notch modes
• External clock input allows precise control over the filter's cutoff frequency
• Automotive-grade reliability suitable for harsh operating environments

Applications

• Automotive audio systems requiring noise filtering
• Industrial sensor signal conditioning
• Communication channel selection circuits

Procurement Notes

Verify the AC suffix confirms automotive grade status against the official datasheet. Confirm the 'T' suffix denotes tape-and-reel packaging if required for automated assembly. Ensure the SOIC-28 footprint matches the PCB layout specifications before ordering.

Selection Notes

Select this component when a fourth-order response is needed without switched-capacitor complexity. Compare against MAX275 if higher order filtering is required. Verify that the 100kHz base cutoff frequency aligns with the target application bandwidth after accounting for clock scaling factors.

Part Context

This part belongs to the MAX274/MAX275 family of continuous-time active filters. It serves as a lower-order alternative to the eighth-order MAX275. The AC variant specifically targets automotive applications, distinguishing it from standard commercial or industrial temperature range versions.

Replacement Considerations

MAX274BCWI+T: Commercial grade version with identical electrical performance but different temperature range. MAX275ACWI+T: Eighth-order version offering steeper roll-off characteristics.