The NE5532 is an industry-standard, high-performance dual operational amplifier renowned for its exceptional audio qualities. Often referred to as the "King of Op-Amps" in the audio world, it combines very low noise, high output-drive capability, and a high unity-gain bandwidth. It is the go-to choice for high-quality professional audio equipment, instrumentation, and control circuits.

Specifications

• Supply Voltage: ± 3V to ± 20V (Dual rail)
• Small-Signal Bandwidth: 10MHz
• Slew Rate: 9V / us
• DC Voltage Gain: 50,000 (Typical)
• Output Drive Capability: 600 Ohm load at 10V
• Package: SOIC-8 (Surface Mount)

Features

• Superior Audio Fidelity: Specifically designed with low distortion and low noise to maintain signal integrity in sensitive audio paths.
• High Output Current: Unlike many general-purpose op-amps, the NE5532 can drive 600 Ohm loads directly, making it suitable for driving headphones or long cable runs.
• Internally Compensated: Unity-gain stable, meaning it won't oscillate when used as a simple buffer or follower.
• Broad Power Range: Capable of operating up to ± 20V, providing significant headroom for large dynamic signals.
• Input Protection: Includes internal diodes to protect the input stage from large differential voltages.

Common Applications

• Professional Audio Mixers: Used in input stages and summing buses for clean, transparent sound.
• Phono Preamplifiers: Amplifying tiny signals from vinyl turntables where low noise is critical.
• Active Crossovers: Dividing audio frequencies for multi-way speaker systems.
• Headphone Amplifiers: Taking advantage of its high output current drive.
• Precision Control Systems: Utilizing its high gain and bandwidth for industrial feedback loops.

Usage Tips

• Power Stability: For the best noise performance, use a well-regulated linear power supply. Place 0.1uF and 10uF capacitors in parallel between the supply rails (V+ and V–) and ground.
• Input Impedance: While the NE5532 is bipolar, it has relatively low input bias currents, but for very high-impedance sources (like piezo pickups), a JFET op-amp like the TL072 might be a better match.
• Dual Supply Advantage: This IC performs best with symmetric dual supplies (e.g., ± 15V). If using a single supply, you must bias the inputs to Vcc/2 and use AC coupling capacitors.
• Thermal Design: If driving heavy loads (like low-impedance headphones) at high volumes, ensure the PCB has sufficient copper area to act as a heatsink for the SOIC-8 package.

Datasheet