1FEATURES
2• Rail-to-Rail Input and Output
• Easily Drives 10kΩ Loads to Within 10mV of
Each Power Supply Voltage
• Optimized for Superior Audio Signal Fidelity
• Output Short Circuit Protection

APPLICATIONS
• Ultra High-Quality Portable Audio
Amplification
• High-Fidelity Preamplifiers
• High-Fidelity Multimedia
• State-of-the-Art Phono Pre Amps
• High-Performance Professional Audio
• High-Fidelity Equalization and Crossover
Networks
• High-Performance Line Drivers
• High-Performance Line Receivers
• High-Fidelity Active Filters
• DAC I–V Converter
• ADC Front-End Signal Conditioning

KEY SPECIFICATIONS
• Power Supply Voltage Range: 2.2V to 5.5V
• Quiescent Current: 2.15mA (typ)
• THD+N (AV = 2, VOUT = 4Vp-p, f IN = 1kHz)
– RL = 2kΩ: 0.00008% (typ)
– RL = 600Ω: 0.0001% (typ)
• Input Noise Density: 4nV/√Hz (typ), @ 1kHz
• Slew Rate: ±8.5V/μs (typ)
• Gain Bandwidth Product: 20MHz (typ)
• Open Loop Gain (RL = 600Ω): 118dB (typ)
• Input Bias Current: 40fA (typ)
• Input Offset Voltage: 0.3mV (typ)
• PSRR: 103dB (typ)

DESCRIPTION
The LME49721 is a low-distortion, low-noise Rail-to-
Rail Input/Output 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 LME49721 Rail-to-Rail Input/Output
operational amplifier delivers superior signal
amplification for outstanding performance. The LME49721 combines a very high slew rate with low
THD+N to easily satisfy demanding applications. To
ensure that the most challenging loads are driven
without compromise, the LME49721 has a high slew
rate of ±8.5V/μs and an output current capability of
±9.7mA. Further, dynamic range is maximized by an
output stage that drives 10kΩ loads to within 10mV of
either power supply voltage.
The LME49721 has a wide supply range of 2.2V to
5.5V. Over this supply range the LME49721’s input
circuitry maintains excellent common-mode and
power supply rejection, as well as maintaining its low
input bias current. The LME49721 is unity gain
stable.