The figure below shows an audio preamplifier circuit using TL072 and few other components.

However, the single and quad versions of this IC also work similarly to TL072 and can be used if TL072 is not available. The equivalent ICs are: Ne5532, TL1971, and LM358. So it requires some experimentation to find which equivalent IC is working well. The equivalent ICs we are mentioning here will not be the accurate alternative of TL072 in some cases but in some applications they will work good and in some applications they will not. Replacement, Equivalent, Or Alternative ICs / Part Numbers: The low noise and low harmonic capabilities with other features makes this IC ideal to use in high accuracy applications. The IC is also THD (Total Harmonic Distortion) free which is also useful if you are making any type of audio preamplifier circuit with this IC. Both the operational amplifiers of the IC have very low current consumption and each opamp only consume 1.4mA normally. The input stage of the TL072 contains JFET transistors which insures lower noise as compare to the BJT transistors. The single version (TL071) contains one opamp while the quad version contains four separate operational amplifiers inside due to which the package is different and it contains 14 pins. There are also single and quad version of this IC which are TL071 and TL074.

The internal circuitry of IC contains two separate operational amplifiers that can be operated with single or dual supply. TL072 is a very popular operational amplifier IC available in 8 pin dip and other packages.

Quiescent current is only 1.4mA to 2.5mA.

Dual operational amplifiers in a single package.

TL072 IC Features / Technical Specifications:

Tl072 pinout download free