LF411ACN

Overview

The LF411ACN is a single precision operational amplifier manufactured by National Semiconductor, now part of Texas Instruments. It features JFET input technology designed for high-performance analog signal processing. Key electrical specifications include a gain-bandwidth product of 8 MHz and a slew rate of 25 V/us. The device exhibits low input offset voltage of 500 uV and input bias current of 60 pA. It operates with a supply voltage range from -15 V to +15 V and consumes 2.5 mA of quiescent current per channel. The unit provides a common-mode rejection ratio of 100 dB and an input voltage noise density of 18 nV/sqrt Hz.

Feature Summary

• JFET input stage providing extremely low input bias current
• Precision characteristics with low input offset voltage
• High common-mode rejection ratio for accurate differential amplification
• Internal frequency compensation simplifies circuit design

Applications

• Precision instrumentation amplifiers
• High-speed integrators
• Sample-and-hold circuits
• Transimpedance amplifiers for photodiodes

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments on the component marking. Confirm the package type matches the specified DIP-8 configuration. Ensure the suffix indicates the AC grade performance level. Check RoHS compliance status against specific production batches. Validate the datasheet version corresponds to the acquired component revision.

Selection Notes

Select this component when low input bias current and high input impedance are critical requirements. The AC grade offers tighter offset voltage specifications compared to standard variants. Consider the 8 MHz bandwidth for applications requiring moderate speed with high precision. Evaluate the DIP-8 package suitability for through-hole assembly processes. Compare power consumption requirements against the 2.5 mA quiescent current specification.

Part Context

This device belongs to the LF41x family of JFET-input operational amplifiers. The family includes dual (LF412) and quad (LF413) configurations sharing similar electrical characteristics. These amplifiers are designed to replace older bipolar input op-amps in high-precision applications. The LF411ACN represents the single-channel variant within this series.

Replacement Considerations

• LF411CN
• LM833

FAQ

What is the maximum supply voltage for the LF411ACN?

The maximum supply voltage is +/- 15 V, resulting in a total supply range of 30 V.

Does the LF411ACN require external frequency compensation?

No, the LF411ACN is internally compensated for unity-gain stability.