MAX268AENG+

Overview

The MAX268AENG+ is a pin-programmable universal and bandpass filter IC manufactured by Analog Devices Inc. under the Maxim Integrated brand. It features two independent second-order switched-capacitor filters housed in a 28-pin PDIP package. The device operates on dual power supplies ranging from ±2.37V to ±6.3V, with a typical supply voltage of ±5V. The center frequency or cutoff frequency is programmable up to 140kHz via an external clock input. This component allows for flexible configuration of filter characteristics through pin selection.

Feature Summary

• Pin-programmable architecture enables direct hardware configuration of filter parameters without microprocessor intervention.
• Contains two independent second-order switched-capacitor filter sections within a single integrated circuit.
• Supports both universal and bandpass filter configurations selectable via specific pin connections.

Applications

• Signal conditioning circuits requiring precise frequency selection
• Audio processing systems utilizing switched-capacitor filtering techniques
• Instrumentation front-ends needing programmable bandwidth control

Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation to confirm package type and temperature range specifications. Ensure compatibility with existing PCB footprints for the 28-pin PDIP variant before procurement. Confirm availability status as discontinued products may require alternative sourcing strategies.

Selection Notes

Select this component when a standalone, pin-configurable switched-capacitor filter solution is required. Verify that the maximum clock frequency supports the desired center frequency target of 140kHz. Ensure the system design accommodates the necessary dual power supply rails within the specified operating voltage limits.

Part Context

This part belongs to the MAX263/MAX264/MAX267/MAX268 family of pin-programmable universal and bandwidth filters. These devices share common architectural features but differ in specific performance characteristics and package options. The MAX268 variant specifically offers two filter sections suitable for complex signal processing tasks.

Replacement Considerations

Check for MAX268ACWG+ or other variants within the same family if different packaging is acceptable. Verify functional equivalence regarding pin programming logic and electrical specifications before substitution.