MAX260BENG+

Overview

The MAX260BENG+ is a microprocessor-programmable universal active filter from the MAX260 series, manufactured by Analog Devices/Maxim Integrated. It features two second-order switched-capacitor sections housed in a 24-pin Plastic DIP package. The device operates within an extended temperature range of -40°C to +85°C and supports single +5V or dual ±5V power supplies. It provides 64-step center frequency control and 128-step Q control via a digital interface. The B-grade accuracy guarantees a clock-to-center-frequency ratio error of up to 2% over the full operating temperature range.

Feature Summary

• Microprocessor-controlled programming for independent adjustment of center frequency and quality factor
• Dual second-order switched-capacitor sections enabling complex filter configurations without external components
• Auto-zero circuitry integrated into Filter A to minimize offset voltage and improve DC performance
• Flexible clock input options supporting crystal, RC network, or external generator sources

Applications

• Microprocessor-tuned filters requiring dynamic response adjustments
• Anti-aliasing filters in data acquisition systems
• Adaptive filtering circuits in signal processing applications
• Phase-locked loops utilizing programmable bandwidth characteristics

Procurement Notes

Verify the specific suffix 'E' confirms the -40°C to +85°C industrial temperature rating and 'NG' indicates the 24-pin plastic DIP package. Confirm that the 'B' grade designation meets the required clock-to-f0 ratio accuracy specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when precise digital control over filter parameters is necessary without external tuning components. The MAX260 variant offers superior DC accuracy compared to the MAX261/MAX262 due to auto-zeroing, making it suitable for low-frequency applications where offset stability is critical. Ensure the system clock frequency aligns with the supported ranges defined in the electrical characteristics table.

Part Context

This component belongs to the MAX260/MAX261/MAX262 family of CMOS dual second-order universal switched-capacitor active filters. These devices are designed to replace traditional passive LC filters or complex discrete active filter networks by integrating all necessary feedback capacitors and switches on-chip. The family allows for cascading multiple units to achieve higher-order filter responses.

Replacement Considerations

The MAX260ACNG+ serves as a commercial temperature equivalent with identical pinout and functionality but operates within a 0°C to +70°C range. For military temperature requirements (-55°C to +125°C), the MAX260AMRG+ or MAX260BMRG+ variants are available in CERDIP packages.