MF10AJ

Active Filters Overview

The MF10AJ is a universal monolithic dual switched capacitor filter manufactured by National Semiconductor. It features two independent second-order filter sections within a single package, utilizing CMOS technology for resistor-programmable operation. The device supports Bessel low-pass filtering characteristics with a cutoff frequency up to 20kHz. It is housed in a 20-pin CERDIP package, designed for precision analog signal processing applications requiring stable and accurate frequency response without external passive components.

Active Filters Feature Summary

• Dual independent second-order filter sections integrated on a single monolithic chip
• Resistor-programmable clock input allows flexible frequency adjustment
• Universal architecture supports various filter responses including Bessel characteristics
• CMOS construction ensures low power consumption and high input impedance

Active Filters Applications

• Precision analog signal conditioning circuits
• Audio processing systems requiring specific phase linearity
• Instrumentation amplifiers and sensor interfaces
• Data acquisition systems with anti-aliasing requirements

Active Filters Procurement Notes

Verify the manufacturer source carefully as National Semiconductor assets are now part of Texas Instruments. Confirm the 'AJ' suffix indicates military or extended temperature grade specifications if required for your design. Ensure the 20-CERDIP package availability aligns with your manufacturing constraints. Request original datasheets from authorized distributors to confirm pinout and electrical parameters match your schematic requirements before finalizing procurement.

Active Filters Selection Notes

Select this component when dual-channel filtered signals are needed with matched performance characteristics. The switched capacitor topology eliminates the need for large external capacitors, saving board space. Consider the clock frequency range and supply voltage requirements against your system's available resources. This device is suitable for applications where precise filter shape is critical and external tuning is undesirable.

Active Filters Part Context

The MF10 series represents a class of universal switched capacitor filters that integrate active RC equivalents on silicon. These devices were widely used in analog signal processing before the dominance of digital DSP solutions. The MF10 specifically provides two identical filter sections, allowing for complex filter designs like state-variable filters or cascaded stages. It remains a reference point for discrete analog filter implementations requiring high accuracy.

Active Filters Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.