LF356N

Overview

The LF356N is a single-channel monolithic JFET input operational amplifier manufactured by Texas Instruments. It integrates matched high-voltage JFETs with standard bipolar transistors using BI-FET II technology. Key electrical parameters include a gain-bandwidth product of 5 MHz, a slew rate of 12 V/µs, and an input bias current of 30 pA. The device operates on a supply voltage range of 10 V to 36 V (±5 V to ±18 V). It features low input offset voltage drift of 5 µV/K and a common-mode rejection ratio of 80 dB. The component is housed in an 8-pin DIP package.

Feature Summary

• Integrates matched high-voltage JFETs with standard bipolar transistors for robust performance
• Designed for applications requiring low input noise voltage and fast settling times
• Capable of driving large capacitive loads without stability issues

Applications

• Signal processing circuits
• Low-noise amplifier stages
• High-speed analog signal conditioning

Procurement Notes

Verify the specific manufacturer source, as availability varies between original Texas Instruments production and third-party distributors. Confirm the package type matches the required PCB footprint. Check for RoHS compliance status if environmental regulations apply to the final assembly. Ensure the operating temperature range meets the system requirements.

Selection Notes

Select this component when a single-channel op-amp with JFET inputs is required for high impedance sources. It is suitable for designs needing moderate bandwidth and high slew rates. Consider the DIP-8 package for through-hole prototyping or legacy board maintenance. Evaluate power consumption against system constraints given the typical supply current.

Part Context

The LF356N belongs to the LF356 series of wide-bandwidth single J-FET operational amplifiers. This series is designed to replace expensive hybrid and module FET operational amplifiers. The device offers internal compensation and large differential input voltage capability, making it a versatile choice for general-purpose analog applications requiring low noise and high speed.

Replacement Considerations

The LF356N/NOPB is a verified equivalent part number representing the same functional device with lead-free packaging.