MAX268AENG

Overview

The MAX268AENG is a pin-programmable universal active filter manufactured by Analog Devices Inc./Maxim Integrated. It utilizes CMOS technology and operates within a supply voltage range of 4.75V to 12.6V. The device features two second-order filter sections, allowing for independent configuration of center frequency, Q factor, and operating mode. It supports various filter functions including bandpass, lowpass, highpass, notch, and allpass configurations without requiring external components. The component is housed in a 24-pin Plastic Dual In-Line Package (PDIP) with a standard .300-inch body width.

Feature Summary

• Pin-programmable architecture enables microprocessor control over precise filter functions
• Dual second-order sections allow independent setting of center frequency and Q factor
• Universal design supports multiple filter topologies without external passive components

Applications

• Signal processing systems requiring programmable filtering
• Instrumentation circuits needing precise frequency selection
• Communication equipment utilizing bandpass or notch filtering

Procurement Notes

Verify the specific suffix 'ENG' against official manufacturer documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for 24-pin PDIP packages. Check current availability status as older CMOS filter series may have limited production runs or end-of-life notifications.

Selection Notes

Select this component when dual-channel programmable filtering is required without external capacitors or resistors. Consider the maximum center frequency capabilities relative to the available clock input options. Verify that the supply voltage range aligns with the system power rails and that the DIP package fits the mechanical constraints of the enclosure.

Part Context

This part belongs to the MAX263/MAX264/MAX267/MAX268 family of universal switched-capacitor filters. These devices share common architectural features but differ in performance specifications such as maximum center frequency and offset characteristics. The MAX268 variant typically offers specific bandwidth and frequency range optimizations compared to its siblings in the series.

Replacement Considerations

Direct replacements include other members of the MAX26x family such as the MAX267ACNG+ or MAX268ACWG+. Verify pin compatibility and electrical parameter alignment before substitution. Alternative solutions may require external components if using non-switched-capacitor architectures.