This document introduces the general characteristics of the LME49725 dual high performance, high fidelity audio operational amplifier. The operational amplifier has extremely low distortion, noise and high slew rate, which can meet the most demanding audio application requirements.
The LME49725 is part of National Semiconductor's ultra‑low distortion, low‑noise, high‑slew‑rate operational amplifier series, optimized for high‑performance audio applications. It offers extremely low voltage‑noise density (3.3 nV/√Hz) and very low total harmonic distortion (0.00004 % THD+N), while delivering up to 22 mA of output current.
Key features include a wide supply voltage range of 4.5 V to 18 V, a typical quiescent current of 3.0 mA per amplifier, and a slew rate of 15 V/µs. The device is unity‑gain stable, supports loads up to 2 kΩ, and is available in an 8‑lead SOIC package.
| Supply Voltage Range | +4.5 V to +18 V |
|---|---|
| Quiescent Current per Amplifier | 3.0 mA (typ) |
| Input Noise Density | 3.3 nV/√Hz (typ) |
| Slew Rate | +15 V/µs (typ) |
| Gain Bandwidth Product | 40 MHz (typ) |
| THD+N | 0.00004 % (typ) |
| Output Current Capability | +22 mA (min) |
The LME49725 operates from +4.5 V up to +18 V.
Each LME49725 amplifier draws about 3.0 mA of quiescent current.
Typical total harmonic distortion plus noise is 0.00004 %.
The device has a typical slew rate of +15 V/µs.