LF347D

Overview

The LF347D is a quad general-purpose JFET-input operational amplifier manufactured by Texas Instruments. It features four independent amplifiers in a 14-pin SOIC surface-mount package. Key electrical specifications include a gain-bandwidth product of 3 MHz and a slew rate of 13 V/µs. The device operates on supply voltages ranging from 8V to 36V, with an operating temperature range of 0°C to 70°C. Input bias current is typically 50 pA, and input offset voltage is specified at 3 mV.

Feature Summary

• JFET input stage providing low input bias current
• High-speed performance with wide bandwidth
• Quad configuration for multi-channel applications

Applications

• High-speed integrators
• Sample-and-hold circuits
• Digital-to-analog converters

Procurement Notes

Verify the manufacturer marking on the component body to confirm Texas Instruments origin, as STMicroelectronics also produces the LF347D variant. Ensure the suffix 'D' corresponds to the SOIC-14 package type required for your PCB layout. Cross-reference the date code against the specific datasheet revision to confirm compliance with current RoHS standards.

Selection Notes

Select this component when high input impedance and moderate speed are required in a surface-mount format. Compare the 3 MHz bandwidth against higher-speed alternatives if signal fidelity at elevated frequencies is critical. Verify that the 14-pin SOIC footprint matches the design constraints before finalizing the bill of materials.

Part Context

This part belongs to the LF34x family of quad JFET operational amplifiers. It shares functional similarities with the LF347N (through-hole) and LF347BD (commercial grade), differing primarily in package style and manufacturing lot specifications. The series is designed for applications requiring low power consumption alongside reasonable speed capabilities.

Replacement Considerations

• LF347DST
• LF347DR