LF411-N

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SNOSBH6E – APRIL 1998 – REVISED OCTOBER 2014

7 Detailed Description

7.1 Overview

These devices are low-cost, high-speed, JFET input operational amplifiers with very low input offset voltage and

input offset voltage drift. They require low supply current yet maintain a large gain bandwidth product and fast

slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset

currents. The LF411 is pin compatible with the standard LM741 allowing designers to immediately upgrade the

overall performance of existing designs.

These amplifiers may be used in applications such as high speed integrators, fast D/A converters, sample and

hold circuits and many other circuits requiring low input offset voltage and drift, low input bias current, high input

impedance, high slew rate and wide bandwidth.

7.2 Functional Block Diagram

7.3 Feature Description

The amplifier's differential inputs consist of a non-inverting input (+IN) and an inverting input (-IN). The

amplifier amplifies only the difference in voltage between the two inputs, which is called the differential input

7.4 Device Functional Modes

7.4.1 Simplified Schematic

Figure 27. Simplified Schematic

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