LF351 Op-Amp: Pinout, Circuit and Replacement

LF351 is a JFET input operational amplifier with internal compensation for input offset voltage. JFET input The device provides wide bandwidth, low input bias current and offset current.

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■ Internally adjustable input offset voltage

■ Low power consumption

■ Wide common-mode (up to VCC+) and differential voltage range

■ Low input bias and offset current

■ Output short-circuit protection

■ High input impedance JFET input stage

■ Internal frequency compensation

■ Latch up free operation

■ High slew rate 16 V/µs (typical)

STMicroelectronics LF351D technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics LF351D.

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.

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

★ Square wave oscillator

★ High Q notch filter

★ Sample-and-hold circuit

★ Fast digital-to-analog converter

★ High seed integrator

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STMicroelectronics is a French-Italian multinational electronics and semiconductor manufacturer headquartered in Geneva, Switzerland. It was formed by the merger of two state-owned semiconductor companies in 1987: France's "Thomson Semiconducteurs" and Italy's "SGS Microelettronica". It is often referred to as "ST" and is the largest semiconductor chip manufacturer in Europe by revenue. STMicroelectronics corporate headquarters and EMEA regional headquarters are located in Geneva, while the holding company STMicroelectronics N.V. is incorporated in the Netherlands.