Fully-Differential Audio Operational Amplifier

LME49724	High Performance, High Fidelity

Features • Drives 600Ω loads with full output signal swing • Optimized for superior audio signal fidelity • Output short circuit protection • PSRR and CMRR exceed 100dB (typ) • Available in PSOP package Description The LME49724 is an ultra-low distortion, low noise, high slew rate fully-differential operational amplifier optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state of the art circuit design, the LME49724 fully-differential audio operational amplifier delivers superior audio signal amplification for outstanding audio performance. The LME49724 combines extremely low voltage noise density (2.1nV/ √ ^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 LME49724 has a high slew rate of ±18V/μs and an output current capability of ±80mA. Further, dynamic range is maximized by an output stage that drives 600Ω loads to 52VP-P while operating on a ±15V supply voltage. The LME49724's outstanding CMRR (102dB), PSRR (125dB), and VOS (0.2mV) results in excellent operational amplifier DC performance. The LME49724 has a wide supply range of ±2.5V to ±18V. Over this supply range the LME49724's input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49724 is unity gain stable. This Fully-Differential Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with capacitive values as high as 100pF. Key Specification ■  Power Supply Voltage Range ±2.5V to ±18V ■  THD+N  (AV = 1, VOUT = 3VRMS, fIN = 1kHz)  RL = 2kΩ 0.00003% (typ)  RL = 600Ω 0.00003% (typ) ■  Input Noise Density 2.1nV/ √ ^Hz (typ) ■  Slew Rate ±18V/μs (typ) ■  Gain Bandwidth Product 50MHz (typ) ■  Open Loop Gain (RL = 600Ω) 125dB (typ) ■  Input Bias Current 60nA (typ) ■  Input Offset Voltage 0.2mV (typ) ■  DC Gain Linearity Error 0.000009% Applications • Ultra high quality audio amplification • High fidelity preamplifiers and active filters • Simple single-ended to differential conversion • State of the art D-to-A converters • State of the art A-to-D input amplifiers • Professional Audio • High fidelity equalization and crossover networks • High performance line drivers and receivers http://www.national.com/mpf/LM/LME49724.html#Overview OSIRIS  A. CAICEDO S.  CRF

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