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With products ranging from the very high-end audio (MUSES Series) to the simple low cost voltage regulator, there is always an NJR product to suit your application's needs, including a range of RF Immunity operational amplifiers and regulators for situations where this is required - such as automotive or portable equipment.

Quick Op-amp Selector Guide

There are now thousands of different op-amps in production, so selecting one that meets your requirements at the right price can prove rather time consuming. To help guide you through the plethora of op-amps available, we have selected an essential range that will cover most applications, from budget to high end, and you can be sure that they offer great value and will be readily available for years to come.

If one of the op-amps featured below won't do, then remember that Profusion has hundreds more to choose from, each one optimised for a different application.

Where to start?

The first decision to make when choosing the op-amp for an audio application is usually between bipolar and JFET input transistors, and for most audio circuits both perform equally well. JFET op-amps have high input impedances so voltage noise is higher, but current noise will be lower. CMOS is generally noisier but lower power, and there are many such designs appearing because CMOS production foundries are plentiful. However, CMOS transistors are not well matched and noise results from imperfections close to the silicon surface, therefore you should only start with CMOS if power consumption is your top priority.

For most audio applications, including active filters, ADC and DAC buffers, voltage followers, line drivers and receivers, the NJM8080 and NJM8065 are the first op-amps you should consider. Both are excellent "jelly bean" op-amps, meaning good all-round performance at a very low cost.

The NJM8065 is a much-improved 741 and is about the cheapest op-amp you can buy, so unless you need even better performance stick with this. For slightly better performance at the cost of higher power consumption, the NJM8080 is a good alternative.

For JFET inputs then, the NJM072C is the starting point. It's a bang up-to-date 2015 version of the TL072 that was first introduced in 1976. If these op-amps don't cut the mustard then follow the chart below for improved performance.

Popular op-amp	We recommend
TL072	NJM072C
OPA2134	MUSES8920
OP275	NJM8901
NE5532	NJM5532C
LM833	NJM2043
MC33078	NJM8080
NE5534	NJM5534
OP270	NJMOP1772
LM4562	NJM2043
OPA2604	NJM8901

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