MAX260ACNG

Overview

The MAX260ACNG is a microprocessor-programmable universal active filter manufactured by Analog Devices Inc./Maxim Integrated. It features two second-order switched-capacitor sections housed in a 24-pin Plastic DIP package. The device supports center frequencies up to 7.5kHz with a maximum clock frequency of 400kHz. It operates on dual supplies ranging from ±2.37V to ±6.3V, typically ±5V. The AC grade guarantees a clock-to-center-frequency ratio error of ±1%. Operating temperature range is 0°C to +70°C.

Feature Summary

• Microprocessor interface for independent control of center frequency and Q factor
• Universal configuration supporting bandpass, lowpass, highpass, notch, and allpass modes
• Auto-zero circuitry for superior DC offset and drift performance
• Internal oscillator support via crystal or RC network

Applications

• Microprocessor-tuned filters
• Anti-aliasing filters
• Digital signal processing systems
• Adaptive filters
• Phase-locked loops

Procurement Notes

Verify the specific ordering suffix 'ACNG' to confirm the commercial temperature range (0°C to +70°C) and plastic DIP packaging. Confirm that the A-grade accuracy specification meets the design requirements for clock-to-f0 ratio error. Check current availability status as this component may be discontinued or subject to obsolescence notices.

Selection Notes

Select the MAX260ACNG when precise DC characteristics and low-frequency operation are required, as it offers superior offset specifications compared to the MAX261 and MAX262 variants. Ensure the application center frequency does not exceed 7.5kHz. Verify that the system can provide the necessary digital interface signals for programming the internal memory locations.

Part Context

The MAX260ACNG belongs to the MAX260/MAX261/MAX262 family of CMOS dual second-order universal switched-capacitor active filters. While the MAX261 extends the range to 57kHz and the MAX262 to 140kHz, the MAX260 prioritizes DC accuracy over bandwidth. All devices share the same pinout and programming architecture but differ in internal sampling ratios and auto-zero capabilities.

Replacement Considerations

Direct functional substitutes within the same package include the MAX260BCNG (2% accuracy) or the MAX260AENG (-40°C to +85°C). For higher frequency applications requiring similar functionality, consider the MAX261ACNG or MAX262ACNG, noting the trade-off in DC offset performance.