LME49871 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – High Performance, High Fidelity Current Feedback Audio Operational Amplifier

April 28, 2008
LME49871
High Performance, High Fidelity Current Feedback Audio
Operational Amplifier
General Description
The LME49871 is an ultra-low distortion, low noise, ultra high
slew rate current feedback operational amplifier optimized
and fully specified for high performance, high fidelity applica-
tions. Combining advanced leading-edge process technology
with state-of-the-art circuit design, the LME49871 current
feedback operational amplifier delivers superior signal ampli-
fication for outstanding performance. Operating on a wide
supply range of ±5V to ±22V, the LME49871 combines ex-
tremely low voltage noise density (1.9nV/√Hz) with very low
THD+N (0.00012%) to easily satisfy the most demanding ap-
plications. To ensure that the most challenging loads are
driven without compromise, the LME49871 has a high slew
rate of ±1900V/μs and an output current capability of ±100-
mA. Further, dynamic range is maximized by an output stage
that drives 150Ω loads to within 2.9V of either power supply
voltage.
The LME49871 's outstanding CMRR (88dB), PSRR (102dB),
and V_OS (0.05mV) give the amplifier excellent operational
amplifier DC performance.
The LME49871 is available in an 8–lead narrow body SOIC.
Demonstration boards are available.
Key Specifications
■ Power Supply Voltage Range
■ THD+N
 (A_V = 1, R_L = 100Ω, V_OUT = 2V_P-P,
 f = 1kHz)
■ THD+N
 (A_V = 1, R_L = 600Ω, V_OUT = 1.4V_RMS,
 f = 1kHz)
■ Input Noise Density
■ Slew Rate
■  Bandwidth
(A_V = 1, R_L= 2kΩ, R_F = 800Ω)
■ Input Bias Current
■ Input Offset Voltage
■ PSRR
■ CMRR
±5V to ±22V
0.00021% (typ)
0.00012% (typ)
1.9nV/√Hz (typ)
±1900V/μs (typ)
213MHz (typ)
1.8μA (typ)
0.05mV (typ)
102dB (typ)
90dB (typ)
Features
■ ^{Easily drives 150Ω loads}
■ ^{Optimized for superior audio signal fidelity}
■ ^{Output short circuit protection}
■ ^{SOIC package}
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}
© 2008 National Semiconductor Corporation 300426
www.national.com