Reveal the difference between NE5532 and similar parts

Hey guys, welcome to this blog. Today is another comparison article on electronic components, we will focus on NE5532 and its similar components: OPA2134, TL072 and NE5534. So off we go!

NE5532 vs OPA2134

The NE5532 is a Bipolar Input op-amp and the OPA2134 is a Fet Input op-amp.

Although many people claim NE5532 as an old component and try to find a new one to take its place, the NE5532 is still good enough for most applications. Plenty of new audio equipment still uses old op-amps such as the NE5532 and TL072 because anything better is overkill and not cost-effective.

If you can use a bipolar OP, the NE5532 is usually the better choice than a JFET OPA2132 / OPA2134. The OPA2134 is more a better replacement for the TL072 when you need a FET type. This may be the case with low-frequency filters.

The OPAx132 family are the slightly better version for DC critical applications.

NE5532 vs TL072

TL072 is also a very popular op-amp, which often used to compare with NE5532, trying to know which one of them is quieter.

Well, the NE5532's bipolar transistor inputs draw input current and are not the same as the TL072's JFET inputs, which have no input current. As a result, if the source impedance is extremely low (specified at 20 ohms), the NE5532 is three times quieter.

However, when the source impedance is around 18.5k ohms, they have equal noise levels because the input current noise adds to the NE5532's input voltage noise. The TL072 is quieter when the source impedance is greater than about 18.5k. A NE5532 is frequently seen as a phonograph cartridge, tape head, or microphone preamp with a massive input coupling capacitor that takes nearly forever to charge. The large input cap's low impedance keeps the input current noise to a minimum.

The NE5532, which has bipolar transistors on its input, has "popcorn" noise below 30Hz, whereas the TL072 has much less.

The NE5532 has back-to-back protection diodes on its inputs that cause many circuits to fail, and it consumes significantly more supply current than a TL072.

NE5532 vs NE5534

Unlike many other low-cost op-amps, the 5532 exists only in a dual form, available in 8-pin PDIP, SO and SOIC packages. The single 5534, as well as the discontinued dual 5533, is not fully compensated and is thus unstable at unity gain; the 5534 has lower noise density than the 5532 but is otherwise similar.

The NE5532 is a dual package and that compensation cap is internal.

The NE5534 is a single op-amp package and that it may require a compensation cap when used in the circuit.

Their pinout diagram is different which means they can not be used interchangeably.

They also differ in gain and instability:

NE5532 is stable down to a gain of 1.

Where NE5534 is stable down to gain of 3 only.

Okay above all is today's electronic knowledge sharing, thanks for viewing and hope it helps!
eelectriclover 9 april 2021, 8:31
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