LF451CM

Overview

The LF451CM is a wide-bandwidth JFET-input operational amplifier manufactured by National Semiconductor. It features internally trimmed input offset voltage and utilizes BI-FET II technology for high performance. Key electrical parameters include a slew rate of 13V/µs, a gain bandwidth product of 4 MHz, and an input bias current of 50 pA. The device is housed in an 8-SOIC package and contains one circuit per unit.

Feature Summary

• JFET input devices providing low input bias current
• Internally trimmed input offset voltage
• Wide-bandwidth design suitable for high-speed applications

Applications

• Instrumentation amplifiers
• Buffer circuits
• High-impedance signal processing

Procurement Notes

Verify the specific suffix 'CM' to confirm the plastic SOIC package variant. Confirm manufacturer status as National Semiconductor or Texas Instruments legacy. Check for obsolete status indicators in official distributor catalogs before procurement planning.

Selection Notes

Select this component when low input bias current and wide bandwidth are required. Compare against other JFET op-amps if higher precision or lower noise is needed. Ensure the 8-SOIC package fits the target PCB layout constraints.

Part Context

The LF451 series belongs to National Semiconductor's family of JFET-input operational amplifiers. The LF451CM specifically denotes the commercial temperature range version in an 8-pin small outline integrated circuit package. It is part of the broader LF45x series including dual and quad variants.

Replacement Considerations

Check for direct pin-compatible substitutes from Texas Instruments or other manufacturers offering JFET-input op-amps with similar slew rates and bandwidth. Verify package compatibility and electrical parameter overlaps.