LF347N/NOPB

Overview

The LF347N/NOPB is a quad general-purpose JFET-input operational amplifier manufactured by Texas Instruments. It features four independent amplifiers in a single package, offering high-speed performance with a gain-bandwidth product of 3 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 200 pA, an input offset voltage of 10 mV, and a common-mode rejection ratio of 100 dB. It is housed in a 14-pin PDIP package and supports through-hole mounting.

Feature Summary

• Integrates four high-speed JFET-input operational amplifiers for multi-channel signal processing
• Provides low input bias current and noise due to matched high-voltage JFET inputs
• Supports wide dual power supply operation up to ±18 V

Applications

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

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS status as per Texas Instruments documentation. Confirm the package type is PDIP-14 for through-hole installation. Ensure the operating temperature range matches the application requirements, typically 0°C to +70°C for this variant. Cross-reference the manufacturer part number with official TI databases to confirm current production status and availability.

Selection Notes

Select the LF347N/NOPB when designing circuits requiring multiple high-speed amplification stages with low input current. It is suitable for applications where moderate precision is acceptable but speed and bandwidth are critical. Compare its 3 MHz gain-bandwidth product against other quad op-amps if higher frequency response is needed. Consider the 14-pin DIP package constraints for PCB layout and thermal management in dense assemblies.

Part Context

The LF347 series belongs to Texas Instruments' family of JFET-input operational amplifiers, designed to offer high input impedance and fast slew rates. This specific part integrates four amplifiers, providing a cost-effective solution for complex analog signal conditioning tasks compared to using discrete single-op-amp packages.

Replacement Considerations

The LF347BN/NOPB serves as a pin-compatible alternative in a surface-mount SOIC-14 package. Designers transitioning from DIP to SMT should verify footprint compatibility and thermal dissipation differences between the two package types.