LF411CN/NOPB

Overview

The LF411CN/NOPB is a single-channel precision operational amplifier from Texas Instruments, featuring JFET inputs for high input impedance. It operates within a supply voltage range of 3.5 V to 18 V (single) or ±1.75 V to ±9 V (dual), with a maximum total supply of 36 V. Key electrical parameters include a gain-bandwidth product of 4 MHz and a slew rate of 15 V/µs. The device exhibits low offset voltage and drift, making it suitable for precision applications.

Feature Summary

• JFET input stage providing extremely high input impedance and low bias current
• Low input offset voltage and low offset voltage drift for precision signal conditioning
• Wide single-supply operating range compatible with standard logic levels

Applications

• Precision integrators and active filters
• Sample-and-hold circuits requiring low charge injection
• High-impedance sensor interfaces

Procurement Notes

Verify the suffix 'NOPB' indicates lead-free/RoHS compliance per Texas Instruments standards. Confirm the package type is PDIP-8 through-hole. Ensure the order matches the specific LF411CN/NOPB designation to avoid confusion with other LF411 variants like CD or CP.

Selection Notes

Select this component when high input impedance and low bias current are critical. Compare against LM324 for general-purpose needs or OPAx series for lower noise. Verify that the 4 MHz bandwidth and 15 V/µs slew rate meet the signal frequency requirements of the target application.

Part Context

Part of the LF411 family of JFET-input operational amplifiers. Designed as a cost-effective alternative to higher-speed FET op-amps while maintaining precision characteristics. Commonly used in industrial control and instrumentation where stability and low drift are prioritized over ultra-high speed.

Replacement Considerations

LF411CN is the non-RoHS predecessor. LF411CDR offers surface-mount SOIC packaging. LM324 provides quad configuration but with different performance metrics.