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Texas Instruments LF347D — Analog & Data Acquisition

STMicroelectronics LF347D JFET Quad Op-Amp, 3 MHz GBW

MPNLF347D
End of Life

STMicroelectronics LF347D, JFET-input quad operational amplifier, 14-SOIC surface mount, 3 MHz gain bandwidth, 13V/µs slew rate, 7 V to 36 V supply, 0°C to 70°C.

$0.97Ref. price · indicative, final on quote
Texas Instruments LF347D datasheet (PDF)
Packaging14-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LF347D specifications
ParameterValue
MountingSurface Mount
Amplifier typeJ-FET
Voltage - input offset5 mV
Voltage - supply span36 V
Current - supply8mA (x4 Channels)
Current - input bias50 pA
Current - output (Channel)40 mA
Operating temperature0°C ~ 70°C (TA)
Gain bandwidth product3 MHz
PackageTube
Slew rate13V/µs
Case14-SOIC (0.154\", 3.90mm Width)
Number of circuits4

Product details

What this quad JFET op-amp is and where it lands on the bench

The STMicroelectronics LF347D is a JFET-input quad operational amplifier in a 14-SOIC package. The JFET inputs keep input bias current at 50 pA, which matters when you're buffering high-impedance sources like photodiodes or piezo sensors. Supply range runs from 7 V to 36 V total, so it fits both single-rail and split-rail designs common in bench instruments, audio mixers, and industrial signal conditioning.

For repair stock, that's the difference between ordering a fresh reel and hunting down NOS on the broker market.

SOIC-14 footprint — fits the board without re-spinning

The 14-SOIC (0.154", 3.90 mm width) body is a standard narrow SOIC footprint. The 40 mA per-channel output current is enough to drive a headphone amp or the input of an ADC.

Frequently asked questions

Where can I buy LF347D and how do I get a price?

The LF347D is available to order through independent distribution. Submit an RFQ for current pricing and availability — stock levels and price are confirmed at quote time, not published here.

What is the difference between LF347 and LF347D?

The LF347D is the surface-mount SOIC-14 variant of the LF347. The D suffix indicates the SOIC package, while the base LF347 typically comes in a DIP package. Electrically they share the same JFET quad op-amp core with 3 MHz GBW and 13V/µs slew rate.

Can I use LF347D in place of TL074?

Yes, the LF347D is a common pin-compatible replacement for the TL074 in SOIC-14. Both are JFET-input quad op-amps with the same pinout. The LF347D offers a higher slew rate (13V/µs vs 13V/µs typical for TL074 — check the specific TL074 variant) and similar 3 MHz GBW. Verify the supply voltage range and temperature grade match your application.

What is LF347D's listed slew rate?

The LF347D has a slew rate of 13V/µs, which defines how fast the output voltage can change. This is sufficient for audio-frequency signals and moderate-speed analog processing up to roughly 200 kHz full-power bandwidth at 10 V output swing.

When sourcing LF347D, what's the closest functional second-source?

The LF247DT is a close functional sibling with a wider temperature range (-40°C to 105°C) and a slightly higher slew rate of 16 V/µs, but it is not a direct pin-compatible second-source — verify the package and supply voltage before substituting. For a direct drop-in, the TL074 in SOIC-14 is the most common alternative with the same pinout.