MAX293EPA+

Overview

The MAX293EPA+ is an active filter integrated circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It implements an 8th-order, lowpass, elliptic response using switched-capacitor technology. The device features a user-selectable passband frequency and operates with a single supply voltage ranging from 5V to 12V. It is housed in an 8-PDIP package designed for through-hole mounting. The component supports a maximum clock frequency of 250kHz and includes internal filters for anti-aliasing and reconstruction. It is suitable for applications requiring precise analog signal filtering without external passive components.

Feature Summary

• Implements an 8th-order elliptic lowpass filter response using switched-capacitor architecture
• Features user-selectable passband frequency control via external clock input
• Includes integrated anti-aliasing and reconstruction filters within the monolithic design
• Provides TTL-compatible digital clock input for flexible system integration

Applications

• Data acquisition systems requiring signal conditioning
• Instrumentation circuits needing precise lowpass filtering
• Industrial control systems with analog sensor interfaces
• Communication equipment utilizing switched-capacitor filtering

Procurement Notes

Verify the specific suffix and temperature grade when sourcing replacements, as availability may vary. Confirm that the replacement component matches the original pinout and electrical specifications exactly. Check for any obsolescence notices or discontinuation alerts from the manufacturer before finalizing procurement decisions. Ensure compatibility with existing PCB layouts and thermal requirements.

Selection Notes

Select this component when an 8th-order elliptic response is required in a compact form factor. Consider the switched-capacitor nature which necessitates a stable clock source for accurate frequency response. Evaluate the power supply range and clock frequency limits against system constraints. Verify that the through-hole packaging aligns with the assembly process and mechanical design requirements of the target application.

Part Context

The MAX293EPA+ belongs to the MAX290-MAX294 family of active filters. These devices utilize switched-capacitor technology to realize complex filter responses without external capacitors or inductors. The MAX293 specifically provides an 8th-order elliptic lowpass characteristic. This family allows designers to implement high-performance filtering solutions using minimal external components, relying primarily on a single clock signal to define the cutoff frequency.

Replacement Considerations

• MAX293EPA