LME49610 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – High Performance, High Fidelity, High Current Audio Buffer

LME49610 
October 28, 2009
High Performance, High Fidelity, High Current Audio Buffer
General Description
The LME49610 is a high performance, low distortion high fi-
delity 250mA audio buffer. The LME49610 is designed for a
wide range of applications. When used inside the feedback
loop of an op amp, it increases output current, improves ca-
pacitive load drive, and eliminates thermal feedback.
The LME49610 offers a pin-selectable bandwidth: a low cur-
rent, 120MHz bandwidth mode that consumes 13mA and a
wide 200MHz bandwidth mode that consumes 19mA. In both
modes the LME49610 has a nominal 2000V/μs slew rate.
Bandwidth is easily adjusted by either leaving the BW pin un-
connected, connecting it to the V_EE pin or connecting a resis-
tor between the BW pin and the V_EE pin.
The LME49610 is fully protected through internal current limit
and thermal shutdown.
Key Specifications
■ Low THD+N
(V_OUT = 3V_RMS, f = 1kHz, Fig. 2)
■ Slew Rate
0.00003% (typ)
2000V/μs (typ)
■ High Output Current
250mA (typ)
■ Bandwidth
BW pin floating
120MHz (typ)
BW connected to V_EE
200MHz (typ)
■ Supply Voltage Range
±2.25V ≤ V_DD ≤ ±22V
Features
■ ^{Pin-selectable bandwidth and quiescent current}
■ ^{Pure fidelity. Pure performance}
■ ^{Short circuit protection}
■ ^{Thermal shutdown}
■ ^{TO–263 surface-mount package}
Applications
■ ^{Headphone amplifier output drive stage}
■ ^{Line drivers}
■ ^{Low power audio amplifiers}
■ ^{High-current operational amplifier output stage}
■ ^{ATE pin driver buffer}
■ ^{Power supply regulator}
Functional Block Diagram
FIGURE 1. Functional Block Diagram
30042541
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