MAX297EWE+T

Overview

The MAX297EWE+T is an eighth-order low-pass elliptic switched-capacitor filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 120 kbps. The device features a fixed cutoff frequency of 25 kHz and is housed in a 16-SOIC package with a wide body (0.295 inch / 7.50 mm). It functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides steep attenuation characteristics typical of elliptic filter topology for signal conditioning.
• Utilizes switched-capacitor architecture to achieve precise frequency response without external passive components.
• Integrates clock generation capabilities suitable for standalone operation or external clocking.

Applications

• Anti-aliasing filtering in analog-to-digital converter front ends.
• Signal conditioning for sensor interfaces requiring narrowband noise rejection.
• Data acquisition systems needing precise low-pass frequency selection.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lot traceability upon receipt. Check for discontinuance notifications as older Maxim products may have limited availability. Ensure storage conditions meet moisture sensitivity level requirements before reflow soldering.

Selection Notes

Select this component when an eighth-order elliptic response is required for sharp roll-off applications. Verify that the 25 kHz cutoff frequency aligns with system bandwidth needs. Ensure the 16-SOIC package fits the PCB layout constraints. Compare against higher-order alternatives if steeper attenuation is necessary, or lower-order options if power consumption must be minimized.

Part Context

This part belongs to the MAX297 series of active filters. It is distinct from other MAXIM parts like the MAX697 (supervisory circuit) or MAX234 (RS-232 driver). The 'E' suffix indicates extended temperature range, while '+T' denotes tape-and-reel packaging. It serves as a specialized analog building block rather than a general-purpose logic or interface IC.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices replacement guides or contact technical support for qualified equivalents. Direct pin-compatible replacements may require verification of electrical parameters such as cutoff frequency tolerance and power supply requirements.