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LF351 Op-Amp IC

LF351 Pin Configuration

Pin No.

Pin Name



Offset Null 1

Pin used for remove the offset voltage and balance input voltage.


Inverting Input

Inverting signal Input


Non-inverting Input

Non-inverting signal Input



Negative Supply Input (Ground)


Offset Null 2

Pin used for remove the offset voltage and balance input voltage.



Output of op amp



Positive Supply Input



Not Connected



  • Low power consumption
  • Output short-circuit protection
  • High slew rate 16 V/us
  • Low input-bias and offset current
  • Latch up free operation
  • Internal Frequency compensation


Technical Specifications

  • Voltage Supply: ±18V
  • Input Supply range: ±15V
  • Differential Input Voltage: ±30V
  • Input Offset Voltage: 5mV
  • Junction Temperature: 115℃
  • (Soldering) Lead Temperature: 260℃
  • Power Dissipation: 670mW


LF351 Equivalents Op-amp ICs

LM301, CA3140, TLC271, ICL7611, TLC071, TLC081, NTE857M

LM741 (if input resistance is not a big issue)


Note: Complete technical information can be found in the LF351 Datasheet linked at the bottom of this page.


Where to Use LF351 IC?

LF351 is single operational amplifier with an internally compensated input offset voltage. It also provides wide bandwidth, low input bias current and offset current. Basically, LF351 is used in the circuits that need high input impedance, high speed integrators, Quick digital to analog converters, sample and hold circuits etc.


How to Use the IC?

The below circuit diagram is used to generate the square wave, by adding few resistor and capacitor externally. It is like a Schmitt trigger circuit that the reference voltage for the comparator action depends on the output voltage. For finding the value of the output frequency use the formula mentioned below:

FOSC = 1 / 2RFCF

 Circuit Using LF351


  • Square Wave oscillator
  • High Q notch Filter
  • Sample and Hold Circuit
  • Fast Digital to Analog Converters
  • High Seed Integrators


2D-model and Dimensions

LF351 2D-model

 Dimension detail of LF351 2D-model

Component Datasheet

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