LF351N

Overview

The LF351N is a single wideband JFET input operational amplifier manufactured by STMicroelectronics. It features a gain-bandwidth product of 4 MHz and a typical slew rate of 16 V/µs. The device operates with a supply voltage range of 6 V to 32 V (single) or ±3 V to ±16 V (dual). Key electrical parameters include an input bias current of 20 pA, input offset voltage of 3 mV, and input voltage noise density of 15 nV/√Hz. It provides an output current of 40 mA and consumes 1.4 mA of supply current. The component is housed in an 8-DIP package and functions within a temperature range of 0°C to 70°C.

Feature Summary

• High-speed JFET input stage providing high input impedance and low input bias current
• Internally frequency compensated for stable operation without external components
• Wide common-mode and differential voltage ranges extending up to the positive supply rail
• Output short-circuit protection and latch-up free operation for enhanced reliability

Applications

• High-speed signal processing circuits
• Precision integrators and differentiators
• Active filters and audio preamplifiers
• Sample-and-hold circuits

Procurement Notes

Verify the specific suffix 'N' corresponds to the through-hole DIP-8 package variant rather than surface-mount options like 'DT'. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the operating temperature range meets your environmental specifications. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when high input impedance and low bias current are critical for signal integrity. The 4 MHz bandwidth suits applications requiring moderate speed with low power consumption. Compare against bipolar op-amps if lower noise is required, or other JFET types if higher slew rates are necessary. Verify that the 40 mA output current meets load drive requirements.

Part Context

The LF351 belongs to the LF35x family of high-speed JFET operational amplifiers from STMicroelectronics. This series is designed for applications demanding high input impedance and fast transient response. The LF351 represents the single-channel version, while variants like the LF353 offer dual channels. It serves as a general-purpose solution for analog signal conditioning tasks.

Replacement Considerations

Publicly confirmed substitute part numbers for the LF351N are not available in the provided documentation.