OPA2604 VS NE5532 How to differentiate them?

The OPA2604 is a dual-input operational amplifier with FET inputs that are designed for improved AC performance. High-quality audio and other applications needing good dynamic performance benefit from very low distortion, low noise, and wide bandwidth.

Even with high source impedance, the OPA2604's low-noise FET input provides a wide dynamic range. To reduce the need for interstage coupling capacitors, the offset voltage is laser-trimmed. The OPA2604 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, with a temperature range of –25°C to +85°C.

The operational amplifiers in the NE5532 family are high-performance devices with good DC and AC characteristics. Low noise, high output drive capability, high unity-gain, maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection are only some of the features. These operational amplifiers are calibrated to run at unity gain on the inside. For these devices, maximum equivalent input noise voltage constraints have been imposed.

OPA2604 Features

• Qualification in Accordance With AEC-Q100†

• Qualified for Automotive Applications

• Customer-Specific Configuration Control Can Be Supported Along With Major-Change Approval

• Low Distortion: 0.0003% at 1 kHz

• Low Noise: 10 nV/Hz

• High Slew Rate: 25 V/µs

• Wide Gain-Bandwidth: 20 MHz

• Unity-Gain Stable

• Wide Supply Range: VS = ±4.5 to ±24 V

• Drives 600 Loads

NE5532 Features

• Small-Signal Bandwidth: 10 MHz

• Output Drive Capability: 600, 10 VRMS

• Input Noise Voltage: 5.0 nV Hz  (Typical)

• DC Voltage Gain: 50000

• AC Voltage Gain: 2200 at 10 kHz

• Power Bandwidth: 140 kHz

• Slew Rate: 9.0 V/s

• Large Supply Voltage Range: 3.0 to 20 V

• Compensated for Unity Gain

• Pb−Free Packages are Available

OPA2604 Pinout

NE5532 Pinout

OPA2604 Block diagram

NE5532 Block Diagram

OPA2604 Absolute Maximum Ratings

NE5532 Absolute Maximum Ratings

OPA2604 Equivalents

• OPA2134

NE5532 Equivalents

• RC4588, LM358, LM4558, NJM4560, LM258

OPA2604 Applications

• Professional Audio Equipment

• PCM DAC I/V Converter

• Spectral Analysis Equipment

• Active Filters

• Transducer Amplifier

• Data Acquisition

NE5532 Applications

• AV Receivers

• Embedded PCs

• Netbooks

• Video Broadcasting and Infrastructure: Scalable Platforms

• DVD Recorders and Players

• Multichannel Video Transcoders

• Pro Audio Mixers

• OPA2604 Datasheet

• NE5532 Datasheet

The OPA2604 is a Fet Input op-amp, while the NE5532 is a Bipolar Input op-amp.

Although many people dismiss the NE5532 as an obsolete component and try to locate a replacement, the NE5532 is still adequate for most applications. Because anything better is overkill and not cost-effective, a lot of new audio equipment still uses ancient op-amps like the NE5532 and TL072.

The NE5532 is usually a better choice than a JFET OPA2604 if you can utilize a bipolar OP. When a FET type is required, the OPA2604  is a better alternative than the TL072. It's possible that this is the case with low-frequency filters.  The OPAx132 family is the slightly better version for DC critical applications.

OPA2604 Package information

NE5532 Package information