Dual High Performance, High Fidelity Audio Operational Amplifier - LME49720


Dual High Performance, High Fidelity Audio Operational Amplifier


The LME49720 is part of the ultra-low distortion, low noise, high slew rate operational amplifier series optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49720 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. The LME49720 combines extremely low voltage noise density (2.7nV/√Hz) with vanishingly low THD+N (0.00003%) to easily satisfy the most demanding audio applications.

To ensure that the most challenging loads are driven without compromise, the LME49720 has a high slew rate of ±20V/μs and an output current capability of ±26mA. Further, dynamic range is maximized by an output stage that drives 2kΩ loads to within 1V of either power supply voltage and to within 1.4V when driving 600Ω loads.

The LME49720's outstanding CMRR (120dB), PSRR (120dB), and VOS (0.1mV) give the amplifier excellent operational amplifier DC performance.

The LME49720 has a wide supply range of ±2.5V to ±17V. Over this supply range the LME49720’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49720 is unity gain stable. This Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with values as high as 100pF.

The LME49720 is available in 8–lead narrow body SOIC, 8–lead PDIP, and 8–lead TO-99. Demonstration boards are available for each package.


  • Easily Drives 600Ω Loads
  • Optimized for Superior Audio Signal Fidelity
  • Output Short Circuit Protection
  • PSRR and CMRR Exceed 120dB (typ)
  • SOIC, PDIP, TO-99 Metal Can Packages

Key Specifications

  • Power Supply Voltage Range: ±2.5 to ±17V
  • THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz):
    • RL = 2kΩ: 0.00003% (typ)
    • RL = 600Ω: 0.00003% (typ)
  • Input Noise Density: 2.7nV/√Hz (typ)
  • Slew Rate: ±20V/μs (typ)
  • Gain Bandwidth Product: 55MHz (typ)
  • Open Loop Gain (RL = 600Ω): 140dB (typ)
  • Input Bias Current: 10nA (typ)
  • Input Offset Voltage: 0.1mV (typ)
  • DC Gain Linearity Error: 0.000009%

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Parametrics Compare all products in Audio Operational Amplifier

Number of Channels (#)
GBW (Typ) (MHz)
Slew Rate (Typ) (V/us)
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
THD + N @ 1 kHz (Typ) (%)
Operating Temperature Range (C)
Io (Typ) (mA)
CMRR (Typ) (dB)
IIB (Max) (pA)
-40 to 85    
Voltage FB