MAX260AENG+

Overview

The MAX260AENG+ is a microprocessor-programmable universal active filter from the MAX260 series, manufactured by Analog Devices Inc./Maxim Integrated. It features two second-order switched-capacitor sections housed in a 24-pin Plastic DIP package with an extended temperature range of -40°C to +85°C. The device operates on ±5V supplies (range ±2.37V to ±6.3V) and supports center frequencies up to 7.5kHz for the MAX260 variant. Key electrical parameters include a typical power supply current of 15mA at ±5V, a gain bandwidth product of 2.5MHz, and a slew rate of 6V/µs. The fCLK/f0 ratio error is guaranteed within ±1% for the A grade.

Feature Summary

• Microprocessor interface allows independent programming of center frequency and Q factor via digital inputs.
• Contains two second-order universal switched-capacitor filter sections capable of bandpass, lowpass, highpass, notch, and allpass configurations.
• Auto-zero circuitry provides superior DC offset and drift specifications compared to other variants in the series.

Applications

• Microprocessor-tuned filters
• Anti-aliasing filters
• Digital signal processing systems

Procurement Notes

Verify the specific suffix 'ENG+' corresponds to the 24-pin Plastic DIP package and the -40°C to +85°C extended temperature range as listed in the ordering information table. Confirm that the 'A' accuracy grade meets the required fCLK/f0 ratio tolerance specifications for the target application before procurement.

Selection Notes

Select this component when precise microprocessor control over filter characteristics is required without external tuning components. The MAX260 variant is suitable for lower frequency applications up to 7.5kHz due to its auto-zero architecture. Ensure the design accommodates the internal clock division by two and utilizes the provided design software for coefficient generation.

Part Context

This part belongs to the MAX260/MAX261/MAX262 family of CMOS dual second-order universal active filters. While the MAX261 and MAX262 support higher center frequencies up to 57kHz and 140kHz respectively, the MAX260 prioritizes DC accuracy through auto-zeroing, making it distinct within the lineup for precision low-frequency filtering tasks.

Replacement Considerations

Direct functional substitutes within the same package and temperature range are not explicitly confirmed in the provided documentation. The MAX260ACNG+ serves as a commercial-grade alternative with identical pinout but a limited 0°C to +70°C operating range.