LME49725 Datasheet, PDF (1/25 Pages) National Semiconductor (TI) – PowerWise Dual High Performance, High Fidelity Audio Operational Amplifier

LME49725
www.ti.com
SNAS427A – APRIL 2008 – REVISED APRIL 2013
LME49725 PowerWise® Dual High Performance, High Fidelity Audio Operational Amplifier
Check for Samples: LME49725
FEATURES
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•2 Optimized for Superior Audio Signal Fidelity
• Output Short Circuit Protection
• PSRR and CMRR Exceed 120dB (Typ)
APPLICATIONS
• Audio Amplification
• Preamplifiers
• Multimedia
• Phono Preamplifiers
• Professional Audio
• Equalization and Crossover Networks
• Line Drivers
• Line Receivers
• Active Filters
KEY SPECIFICATIONS
• Power Supply Voltage Range: ±4.5V to ±18 V
• THD+N (A_V = 1, V_OUT = 3V_RMS, f_IN = 1kHz)
– R_L = 2kΩ: 0.00004% (Typ)
– R_L = 600Ω: 0.00004% (Typ)
• Quiescent Current per Amplifier: 3.0 mA (Typ)
• Input Noise Density: 3.3 nV/√Hz (Typ)
• Slew Rate: ±15 V/μs (Typ)
• Gain Bandwidth Product: 40 MHz (Typ)
• Open Loop Gain (R_L = 600Ω): 135 dB (Typ)
• Input Bias Current: 15 nA (Typ)
• Input Offset Voltage: 0.5 mV (Typ)
• DC Gain Linearity Error: 0.000009 % (Typ)
DESCRIPTION
The LME49725 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 LME49725 audio operational
amplifiers deliver superior audio signal amplification
for outstanding audio performance. The LME49725
combines extremely low voltage noise density
(3.3nV/√Hz) with vanishingly low THD+N (0.00004%)
to easily satisfy the most demanding audio
applications. To ensure that the most challenging
loads are driven without compromise, the LME49725
has a high slew rate of ±15V/μs and an output current
capability of ±22mA. Further, dynamic range is
maximized 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.
Part of the PowerWise® family of energy efficient
solutions, the LME49725 consumes only 3.0mA of
supply current per amplifier while providing superior
performance to high performance, high fidelity
applications.
The LME49725's outstanding CMRR (120dB), PSRR
(120dB), and V_OS (0.5mV) give the amplifier excellent
operational amplifier DC performance.
The LME49725 has a wide supply range of ±4.5V to
±18V. Over this supply range the LME49725’s input
circuitry maintains excellent common-mode and
power supply rejection, as well as maintaining its low
input bias current. The LME49725 is unity gain
stable. This audio operational amplifier achieves
outstanding AC performance while driving complex
loads with values as high as 100pF.
The LME49725 is available in 8–lead narrow body
SOIC.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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