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2 通道、55MHz、低噪声、高性能 RRO 音频运算放大器
Number of channels (#) 2
Total supply voltage (Min) (+5V=5, +/-5V=10) 5
Total supply voltage (Max) (+5V=5, +/-5V=10) 34
GBW (Typ) (MHz) 55
Slew rate (Typ) (V/us) 20
Rail-to-rail No
Vos (offset voltage @ 25 C) (Max) (mV) 0.7
Iq per channel (Typ) (mA) 5
Vn at 1 kHz (Typ) (nV/rtHz) 2.5
THD + N @ 1 kHz (Typ) (%) 0.00003
Rating Catalog
Operating temperature range (C) -40 to 85
Output current (Typ) (mA) 26
Architecture Voltage FB
CMRR (Typ) (dB) 120
Input bias current (Max) (pA) 72000
  • 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%

The LME49720 device 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.