MAX274AEWI

Overview

The MAX274AEWI is a fourth-order continuous-time active filter manufactured by Analog Devices Inc. under the Maxim Integrated brand, housed in a 28-pin SO-Wide package. It operates on a single 5V supply with a voltage range of 2.37V to 5.5V and supports an operating temperature from -40°C to +85°C. The device features a cutoff frequency of 150kHz and includes four external capacitors for tuning. It provides low distortion performance with a dynamic range of 90dB and utilizes a clock-to-cutoff frequency ratio of 50:1.

Feature Summary

• Continuous-time architecture eliminates switched-capacitor noise and clock feedthrough
• Single-supply operation simplifies power requirements for portable systems
• Low harmonic distortion ensures high-fidelity signal processing
• External capacitor tuning allows flexible configuration without resistor trimming

Applications

• Wireless communication channel selection
• Instrumentation signal conditioning
• Audio processing circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for lead-free packaging specifications. Ensure storage conditions adhere to moisture sensitivity levels defined in the datasheet to prevent soldering defects during assembly.

Selection Notes

Select this component when continuous-time filtering is required to avoid switched-capacitor artifacts. Verify that the application environment supports the specified operating temperature range. Ensure the system clock frequency aligns with the required 50:1 ratio relative to the desired cutoff frequency for optimal performance.

Part Context

This part belongs to the MAX274/MAX275 family of continuous-time active filters. The 'A' suffix typically denotes an extended industrial temperature range compared to commercial variants. The 'W' indicates the SOIC-28 wide body package. These filters are designed for applications requiring precise analog filtering without digital conversion overhead.

Replacement Considerations

MAX275BCPI

FAQ

What is the recommended clock-to-cutoff frequency ratio?

The datasheet specifies a clock-to-cutoff frequency ratio of 50:1 for optimal performance.

Does the MAX274AEWI require dual power supplies?

No, it is designed for single-supply operation, typically using a 5V source.

How is the filter cutoff frequency adjusted?

The cutoff frequency is set by connecting external capacitors to specific pins; no resistors are required for tuning.