MAX274ACNG+

Overview

The MAX274ACNG+ is a monolithic, low-pass active filter manufactured by Analog Devices under the Maxim Integrated brand. It implements an 8th-order Bessel response using continuous-time architecture within a single package. The device operates on a single +5V supply and features a programmable cutoff frequency adjustable from 10kHz to 400kHz via an external clock input. It is housed in a 28-pin Narrow SOIC (NS) surface-mount package with an industrial temperature range of -40°C to +85°C.

Feature Summary

• Continuous-time architecture eliminates switched-capacitor clock feedthrough and aliasing issues.

Applications

• Anti-aliasing filtering for analog-to-digital converters
• Signal conditioning in data acquisition systems
• Audio processing circuits requiring linear phase response

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the ordering suffix matches the specific package and temperature grade requirements. Review the official datasheet for handling precautions and storage conditions before integration into production designs.

Selection Notes

Select this component when a sharp roll-off combined with minimal phase distortion is required. The continuous-time design is preferred over switched-capacitor alternatives in environments where clock noise coupling must be avoided. Ensure the system clock frequency remains within the specified operational limits for accurate filter tuning.

Part Context

This part belongs to the MAX274/MAX275 family of continuous-time active filters. While the MAX275 offers a Chebyshev response, the MAX274 provides a Bessel characteristic. Both share identical pinouts and control interfaces, allowing for flexible design adjustments based on phase linearity versus ripple tolerance requirements.

Replacement Considerations

Direct functional substitutes include the MAX275 for similar applications requiring different filter responses. Cross-reference with other continuous-time filter families if package constraints or supply chain availability necessitate alternative sourcing options.