LF347M

Overview

The LF347M is a high-speed quad JFET-input operational amplifier manufactured by Fairchild Semiconductor. It features a typical gain bandwidth product of 4 MHz and a slew rate of 13 V/µs. The device operates within a supply voltage range of ±18 V, with an operating temperature range of 0°C to +70°C. Key electrical characteristics include a maximum input offset voltage of 13 mV, a typical input bias current of 50 pA, and a supply current of 7.2 mA. It is housed in a 14-SOP package.

Feature Summary

• Quad JFET-input architecture providing high input impedance
• High slew rate for fast signal response
• Wide gain bandwidth for high-frequency applications

Applications

• High-speed integrator circuits
• Sample-and-hold circuits
• Data acquisition systems

Procurement Notes

Verify the manufacturer origin, as the LF347M was originally produced by Fairchild Semiconductor. Confirm that the specific revision matches the required datasheet specifications. Ensure the 14-SOP package dimensions align with the target PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a quad amplifier configuration is required alongside high input impedance and wide bandwidth capabilities. The JFET input stage minimizes loading effects on preceding circuit stages. Consider the 14-SOP package constraints during thermal management planning. Evaluate the power dissipation limits relative to the ambient operating conditions.

Part Context

This part belongs to the LF347 family of general-purpose quad operational amplifiers. It shares functional similarities with other members like the LF347N but differs in packaging. The device represents a standard solution for analog signal processing tasks requiring low input bias currents and moderate speed performance.

Replacement Considerations

Direct substitutes include the LF347N (DIP package) or equivalent quad JFET op-amps from other manufacturers such as TI or STMicroelectronics. Verify pin compatibility and electrical parameter tolerances before substitution.