LME49720_14 Datasheet, PDF (1/40 Pages) Texas Instruments – Dual High Performance, High Fidelity Audio Operational Amplifier

LME49720
www.ti.com
SNAS393B – MARCH 2007 – REVISED OCTOBER 2007
LME49720 Dual High Performance, High Fidelity Audio Operational Amplifier
Check for Samples: LME49720
FEATURES
1
•2 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
DESCRIPTION
The LME49720 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 LME49720 audio operational amplifiers deliver superior audio
signal amplification for outstanding audio performance. The LME49720 combines extremely low voltage noise
density (2.7nV/√Hz) with vanishingly low THD+N (0.00003%) to easily satisfy the most demanding audio
applications. To ensure that the most challenging loads are driven without compromise, the LME49720 has a
high slew rate of ±20V/μs and an output current capability of ±26mA. 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.
The LME49720's outstanding CMRR (120dB), PSRR (120dB), and V_OS (0.1mV) give the amplifier excellent
operational amplifier DC performance.
The LME49720 has a wide supply range of ±2.5V to ±17V. Over this supply range the LME49720’s input circuitry
maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current.
The LME49720 is unity gain stable. This Audio Operational Amplifier achieves outstanding AC performance while
driving complex loads with values as high as 100pF.
The LME49720 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.
Table 1. Key Specifications
■ Power Supply Voltage Range
■ THD+N (A_V = 1, V_OUT = 3V_RMS, f_IN = 1kHz)
R_L = 2kΩ
R_L = 600Ω
■ Input Noise Density
■ Slew Rate
■ Gain Bandwidth Product
■ Open Loop Gain (R_L = 600Ω)
■ Input Bias Current
■ Input Offset Voltage
VALUE
±2.5 to ±17
UNIT
V
0.00003% (typ)
0.00003% (typ)
2.7nV/√Hz (typ)
±20V/μs (typ)
55
140
10nA (typ)
0.1mV (typ)
MHz (typ)
dB (typ)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2007, Texas Instruments Incorporated