LF347D

Overview

The LF347D is a quad wideband JFET operational amplifier manufactured by STMicroelectronics. It integrates four high-speed amplifiers in a monolithic IC, featuring well-matched JFET and bipolar transistors. Key electrical parameters include a gain-bandwidth product of 3 MHz to 4 MHz, a slew rate of 16 V/µs, and an input bias current of 20 pA to 200 pA. The device operates with a supply voltage range of ±4V to ±18V (up to 44V total) and delivers an output current of 40 mA to 60 mA per channel. Input offset voltage is specified at 3 mV to 10 mV, with a common-mode rejection ratio of 100 dB.

Feature Summary

• High slew rate performance for fast signal response
• Low input bias and offset currents due to JFET input stage
• Internal frequency compensation eliminates external components
• Output short-circuit protection ensures device safety

Applications

• High-speed analog signal processing circuits
• Precision instrumentation and measurement systems
• Video signal buffering and conditioning
• Active filter designs requiring low noise

Procurement Notes

Verify the specific datasheet revision and package marking when ordering. Confirm RoHS compliance status as regulatory requirements may vary by region and production date. Ensure the supplier provides authentic STMicroelectronics components to avoid counterfeit risks. Check for any specific handling instructions related to electrostatic discharge during assembly.

Selection Notes

Select this component for applications requiring high input impedance and moderate bandwidth. The JFET input stage suits high-impedance sensor interfaces. Compare against other quad op-amps if lower power consumption or higher precision is required. Verify that the 14-SOIC package fits the PCB layout constraints and thermal requirements of the design.

Part Context

This part belongs to the LF347 family of quad operational amplifiers. It shares core architecture with variants like the LF347N but differs in packaging. The 'D' suffix typically indicates a surface-mount SOIC package. It serves as a general-purpose high-speed amplifier within ST's linear integrated circuit portfolio.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.