- Superior audio signal fidelity optimized
- Output short-circuit protection
- PSRR and CMRR over 120 dB (typical)
illustrate
The LME49725 is part of a family of ultra-low distortion, low noise, high slew rate operational amplifiers optimized and fully specified for high performance, high fidelity applications. Combined with state-of-the-art circuit design and cutting-edge process technology, the LME49725 audio operational amplifier provides superior audio signal amplification with excellent audio performance. The LME49725 combines a very low voltage noise density (3.3nV/) √ ^Hz) with a negligible THD+N (0.00004%), easily satisfying the most demanding audio applications. To ensure that the most challenging loads are driven without compromise, the LME49725's ±15V/μs slew rate and output current ± 22 mA capability. In addition, dynamic range is maximized to drive 1V of either supply voltage within 1.4V of a 2KΩ load and an output stage within a 600Ω load.
Part of the PowerWise ® family of energy-efficient solutions, the LME49725 consumes only 3.0 mA of supply current per amplifier while delivering superior performance for high-performance, high-fidelity applications.
The LME49725 has excellent CMRR (120 dB), (PSRR 120 dB), andVThe OS (0.5mV) gives excellent amp op amp DC performance.
The LME49725 has a wide supply voltage range of ± 4.5V to ± 18V. The input circuitry of the LME49725 maintains excellent common-mode and power supply rejection over this supply voltage range, as well as maintaining its low input bias current. The LME49725 is unity-gain stable. This audio op amp achieves excellent AC performance with high values of up to 100pF when driving complex loads.
The LME49725 is an 8-pin narrow body SOIC.
Main specifications
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■ Supply voltage range
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± 4.5V to ± 18V
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■ THD + N （AV = 1，VOUT= 3VRMS，F IN= at 1kHz)
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RL = 2kΩ
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0.00004% (typical)
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RL =600Ω
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0.00004% (typical)
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■ Quiescent current, per amplifier
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3.0 mA (typical)
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■ Input noise density
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3.3nV / √ ^ Hz (typical)
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■ Slew rate
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±15V/μs (typical)
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■ Gain-bandwidth product
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40MHz (typical)
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■ Open-loop gain（RL =600Ω）
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135 dB (typical)
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■ Input bias current
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15nA (typical)
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■ Input offset voltage
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0.5mV (typical)
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■ DC gain linearity error
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0.000009% (typical)
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apply
- Audio amplification
- preamplifier
- multimedia
- Phono preamp
- Professional audio
- Equalization and crossover networks
- Line driver
- Line receiver
- Active filters
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