LF347BN/PB

Overview

The LF347BN/PB is a quad JFET-input operational amplifier manufactured by Texas Instruments. It features four independent high-speed amplifiers in a single package, offering a gain-bandwidth product of 4 MHz and a slew rate of 13 V/µs. The device operates on supply voltages ranging from 8 V to 36 V (single) or ±4 V to ±18 V (dual). Key electrical characteristics include an input bias current of 50 pA, input offset voltage of 3 mV, and common-mode rejection ratio of 80 dB. It is housed in a 14-pin SOIC package and supports an operating temperature range of 0°C to 70°C.

Feature Summary

• Quad JFET input architecture providing low input bias current and high input impedance
• High-speed performance with wide bandwidth and fast slew rate for signal fidelity
• Wide single or dual power supply operation capability
• Internal frequency compensation eliminates external component requirements

Applications

• Audio preamplifier stages
• Active filter circuits
• Voltage follower buffers
• Transducer signal conditioning

Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with required packaging and environmental standards. Confirm that the 'PB' designation aligns with lead-free and RoHS compliance requirements for your assembly process. Cross-reference the exact part number with official distributor catalogs to validate current production status and availability before finalizing procurement plans.

Selection Notes

Select this component when designing circuits requiring multiple high-impedance inputs with moderate bandwidth needs. The JFET input stage is suitable for applications where low input current noise is critical. Ensure the PCB layout accommodates the SOIC-14 footprint and provides adequate thermal dissipation within the specified operating temperature range.

Part Context

This part belongs to the LF347 family of wide bandwidth quad operational amplifiers. It serves as a higher-performance alternative to standard bipolar input op-amps, offering superior input impedance. The device is commonly used in multi-channel analog signal processing systems where space efficiency and channel matching are important design factors.

Replacement Considerations

Compatible substitutes include the LF347N and LF347M-NOPB. Verify pinout compatibility and electrical parameter tolerances before substitution.