MAX297ESA+T

Overview

The MAX297ESA+T is an eighth-order elliptic low-pass switched-capacitor filter integrated circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 4.75 V to 11 V and supports a typical program clock frequency of 2.5 MHz. The device provides a cutoff frequency of 25 kHz or 50 kHz, selectable via external components. It features a single channel and is housed in an 8-SOIC package suitable for surface-mount installation. The operational temperature range spans from -40°C to +85°C.

Feature Summary

• Provides high-selectivity elliptic filtering characteristics using switched-capacitor technology
• Enables programmable cutoff frequency control through an external clock signal
• Integrates active filtering functions into a compact single-channel architecture

Applications

• Signal conditioning in data acquisition systems
• Anti-aliasing filters in analog-to-digital conversion circuits
• Audio processing equipment requiring precise frequency response

Procurement Notes

Verify component authenticity through authorized distributors due to potential availability constraints. Confirm specific cutoff frequency variants (25 kHz or 50 kHz) match design requirements before procurement. Ensure supply chain sources provide valid traceability documentation. Check current stock status as inventory levels may fluctuate. Validate package integrity upon receipt to prevent handling damage.

Selection Notes

Select this component when designing circuits requiring steep roll-off characteristics without passive inductor usage. Consider the dependency on an external clock source for filter operation timing. Evaluate power supply noise immunity given the switched-capacitor nature. Assess board space limitations against the 8-SOIC footprint requirements. Compare performance metrics against alternative filter topologies for cost and complexity optimization.

Part Context

This part belongs to the MAX297 series of active filters, representing a line of switched-capacitor devices designed for versatile signal processing applications. The series includes variations with different cutoff frequencies and package options. These components bridge the gap between discrete RC networks and complex digital filtering solutions, offering analog precision with digital programmability.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.