OPA2134 High Performance Audio Op Amp IC

The OPA2134 Op-Amp is a low-cost, high-Performance Audio Operational Amplifier. The OPA2134 series is ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. A true FET input stage is incorporated to provide superior sound quality and speed for exceptional audio performance. This, in combination with high output drive capability and excellent DC performance, allows for use in a wide variety of – Slew Rate: 20 V/µs demanding applications.

OPA2134 Op-Amp Pinout Configuration 

Features & Specifications

• JFET Input Op-Amp dual Package
• Superior Sound Quality
• Ultra Low Distortion: 0.00008%
• Low Noise: 8 nV/√Hz
• True FET-Input: Ib =5pA
• Slew Rate: 20 V/µs
• Bandwidth: 8 MHz
• High Open-Loop Gain: 120 dB (600 Ω)
• Wide Supply Range: ±2.5 V to ±18 V
• Single, Dual, and Quad Versions
• Common mode Rejection Ratio CMRR: 100dB
• Low Input Bias and Offset Current
• Output Short circuit protection
• Internally Trimmed Offset Voltage: 15 mV
• Optional External Trim Available

Note: Complete Technical Details can be found in the OPA2134 datasheet given at the end of this page.

OPA2134 Equivalent Op-Amp

Tl074, Tl072, LM358, LM338

Where to use OPA2134 Op-Amp

The OPA2134 is a Dual Package Operational Amplifier, meaning it has two Op-Amps inside it and each Op-Amp can be used independently.

The main distinguishing feature of the OPA2134 Op-Amp is that they are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. A true FET input stage is incorporated to provide superior sound quality and speed for exceptional audio performance. This, in combination with high output drive capability and excellent DC performance, allows for use in a wide variety of demanding applications. In addition, the OPA134 has a wide output swing, within 1V of the rails, allowing increased headroom and making it ideal for use in any audio circuit.

This IC has single and dual versions in 8-pin DIP and 50-8 surface-mount packages in standard configurations. The quad is available in 14-pin DIP and SO-14 surface-mount packages. All are specified for 40°C to 85°C operations. A SPICE macromodel is available for design analysis.

How to use OPA2134 Op-Amp

We can use this IC for audio pre-amplification, it can provide an edge in terms of sound quality because of its price compared to its specs. As a test, a non inverting op-amp configuration is shown below.

In the above, the OPA2134 Op-amp is configured as a non-inverting configuration. The gain of the op-amp is set to 10. For that we have used a 1K resistor and a 9.1K resistor, as you can see for the simulation we have used a variable potentiometer be varying the potentiometer we can vary the input voltage and the output voltage will also vary, to power the op-amp we have used +12V and -12V supply, as the gain of the op-amp is 10. So if we provide 1V at the input we will get 10V at the output and the simulated circuit shows exactly that.
 

Special Features

The OPA. Sound Plus, audio operational amplifiers are easy to use and free from phase-inversion and overload problems often found in common FET-input operational amplifiers. They can be operated from ±2.5-V to ±18-V power supplies. Input cascade circuitry provides excellent common-mode rejection and maintains low input bias current over its wide input voltage range minimizing distortion. OPA134 series operational amplifiers are unity-gain stable and provide excellent dynamic behaviour over a wide range of load conditions, including high load capacitance. The dual and quad versions feature completely independent circuitry for the lowest crosstalk and freedom from interaction, even when overdriven or overloaded. The below graph shows the relation between Total Harmonic Distortion, Noise, and Frequency

If your application needs additional petition the OPA314 device offers an additional trim facility that can be useful for your application.

Applications 

• Professional Audio and Music
• Line Drivers
• Line Receivers
• Multimedia Audio
• Active Filters
• Preamplifiers
• Integrators
• Crossover Networks

2D Model and Dimensions

If you are designing a PCB or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions