LME49710_07 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – High Performance, High Fidelity Audio Operational Amplifier

March 2007
LME49710
High Performance, High Fidelity Audio Operational
Amplifier
General Description
The LME49710 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 LME49710 audio opera-
tional amplifiers deliver superior audio signal amplification for
outstanding audio performance. The LME49710 combines
extremely low voltage noise density (2.5nV/Hz) with vanish-
ingly low THD+N (0.00003%) to easily satisfy the most de-
manding audio applications. To ensure that the most
challenging loads are driven without compromise, the
LME49710 has a high slew rate of ±20V/μs and an output
current capability of ±26mA. Further, dynamic range is max-
imized by an output stage that drives 2kΩ loads to within 1V
of either power supply voltage and to within 1.4V when driving
600Ω loads.
The LME49710's outstanding CMRR(120dB), PSRR(120dB),
and V_OS (0.05mV) give the amplifier excellent operational
amplifier DC performance.
The LME49710 has a wide supply range of ±2.5V to ±17V.
Over this supply range the LME49710’s input circuitry main-
tains excellent common-mode and power supply rejection, as
well as maintaining its low input bias current. The LME49710
is unity gain stable. The Audio Operational Amplifier achieves
outstanding AC performance while driving complex loads with
values as high as 100pF.
The LME49710 is available in 8–lead narrow body SOIC, 8–
lead plastic DIP, and 8–lead metal can TO-99. Demonstration
boards are available for each package.
Key Specifications
■ Power Supply Voltage Range
±2.5V to ±17V
■ THD+N (A_V = 1, V_OUT = 3V_RMS, f_IN = 1kHz)
R_L = 2kΩ
0.00003% (typ)
R_L = 600Ω
0.00003% (typ)
■ Input Noise Density
2.5nV/√Hz (typ)
■ Slew Rate
±20V/μs (typ)
■ Gain Bandwidth Product
55MHz (typ)
■ Open Loop Gain (R_L = 600Ω)
140dB (typ)
■ Input Bias Current
7nA (typ)
■ Input Offset Voltage
0.05mV (typ)
■ DC Gain Linearity Error
0.000009%
Features
■ ^{Easily drives 600Ω loads}
■ ^{Optimized for superior audio signal fidelity}
■ ^{Output short circuit protection}
■ ^{PSRR and CMRR exceed 120dB (typ)}
■ ^{SOIC, DIP, TO-99 metal can packages}
Applications
■ ^{Ultra high quality 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}
© 2007 National Semiconductor Corporation 202104
www.national.com