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.