LME49740   
Quad High Performance, High Fidelity Audio Operational Amplifier from the PowerWise® Family		 Click link to Download

Features
•Easily drives 600Ω loads
•Optimized for superior audio signal fidelity
•Output short circuit protection
•PSRR and CMRR exceed 120dB (typ)
•SOIC and DIP packages

Description

The LME49740 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 LME49740 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. The LME49740 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 LME49740 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 LME49740's outstanding CMRR(120dB), PSRR(120dB), and VOS(0.1mV) give the amplifier excellent operational amplifier DC performance.

The LME49740 has a wide supply range of ±2.5V to ±17V. Over this supply range the LME49740’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49740 is unity gain stable. The Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with values as high as 100pF.

The LME49740 is available in 14–lead narrow body SOIC and 14–lead plastic DIP. Demonstration boards are available for each package.

Key Specification
■  Power Supply Voltage Range ±2.5V to ±17V
■  THD+N (AV = 1, VOUT = 3VRMS,    fIN = 1kHz)  
 RL = 2kΩ 0.00003% (typ)
 RL = 600Ω 0.00003% (typ)
■  Input Noise Density 2.7nV/ √ ^Hz (typ)
■  Slew Rate ±20V/μs (typ)
■  Gain Bandwidth Product 55MHz (typ)
■  Open Loop Gain (RL = 600Ω) 140dB (typ)
■  Input Bias Current 10nA (typ)
■  Input Offset Voltage 0.1mV (typ)
■  DC Gain Linearity Error 0.000009%

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
Also Recommended
LM4562▲Dual High Performance High Fidelity Audio Op Amp
LME49710▲Single High Performance High Fidelity Audio Op Amp



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Typical Application
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Connection Diagram
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Typical Performance
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Paramaters / ValuesLME49740 LM4562 LME49710
THD0.00003 % 0.00003 % 0.00003 %
PSRR120 dB 120 dB 125 dB
Supply Min5 Volt 5 Volt 5 Volt
Single/Dual/QuadQuad Dual Single
Special FeaturesUltra Low Distortion, Very Low Noise Ultra Low Distortion, Very Low Noise Ultra Low Distortion, Very Low Noise
THD ConditionsAv=1; Vout=3Vrms; Load=600ohm and 2k Av=1; Vout=3Vrms; Load=600ohm and 2k Av=1; Vout=3Vrms; Load=600ohm and 2k
PSRR Conditionsdelta(Vs)=20V delta(Vs)=20V delta(Vs)=20V
Supply Current per Amplifier4.62 mA 5.0 mA 4.8 mA
Supply Max34 Volt 34 Volt 34 Volt
Shut downNo No No
Voltage Noise2.5 nV/root(Hz) 2.7 nV/root(Hz) 2.5 nV/root(Hz)
Max Input Bias Current72 nA 72 nA 72 nA
Output Current30 mA 42 mA 26 mA
Offset Voltage, typ0.1 mV 0.1 mV 0.05 mV
Gain Bandwidth55 MHz 55 MHz 55 MHz
Slew Rate20 Volts/usec 20 Volts/usec 20 Volts/usec
CMRR120 dB 120 dB 120 dB
CMRR ConditionsVcm from -10V to +10V Vcm from -10V to +10V Vcm from -10V to +10V
Temperature Min-40 deg C -40 deg C -40 deg C
Temperature Max85 deg C 85 deg C 85 deg C
Channels4 Channels 2 Channels 1 Channels
Input OutputTypeNot Rail to Rail Not Rail to Rail Not Rail to Rail
Offset Voltage max, 25C0.7 mV 0.7 mV 0.7 mV
AutomotiveYes Yes
PowerWiseYes Yes Yes

Datasheets
TitleSizeDateOther
Language
LME49740 Quad High Performance, High Fidelity Audio Operational Amplifier463
Kbytes		8-Feb-08 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LME49740MA/NOPB

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide110
AVNET-EMWorldwide2078
DIGIKEYWorldwide196
FARNELLEurope and Asia94
FUTUREWorldwide110
NEWARKAmericas17
$4.00 each at 1K+ pcsrail
of
55
LME49740MAX/NOPB

RoHS Status



SOIC NARROW		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$4.00 each at 1K+ pcsreel
of
2500
LME49740NA/NOPB

RoHS Status



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide100
DIGIKEYWorldwide305
FARNELLEurope and Asia229
FUTUREWorldwide65
NEWARKAmericas194
$4.00 each at 1K+ pcsrail
of
25

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LME49740MABD
Quad High Performance, High Fidelity Audio Operational Amplifier (8-pin, SOIC Package)Full production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide86
$150.00 each1

Description:

The LME49740 is a Quad High Fidelity Audio Operational Amplifier. This Audio Amplifier offers near zero THD+N and sets a new standard for high end audio users. Nationals newest Amplifier uses state of the art circuitry and process to achieve a new class of audio performance and technology. The AC and DC parameters in this amplifier series offers users a solution well suited for the most demanding signal path applications. There are two package choices to enable all users ease of use and evaluation criteria.

The LME49740 is designed for high slew rate, low noise and high output for systems needing +/-2.5 to +/-17V functionality. The pin out is the National standard to quickly upgrade existing boards. This series is for applications such as high quality audio amplification, multi-media, imaging, line drivers/receivers and active filters. The output current is for 600Ohm loads with more than 26mA drive with THD+N over a wide voltage range.

The LME49740MABD and LME49740NABD are evaluation boards designed to establish performance and evaluation to design the best end user system. The evaluation boards include all components for a ready-to-use, stand-alone bench work.

Features:

  • Quad Audio Operational Amplifier
  • Ultra low THD+N of 0.00003%
  • 34V operation and low noise
  • 600Ohm loads
  • SNR 97dB
  • High output of 26mA
  • Gain Bandwidth Product >55MHz
  • 20uV/S Slew rate
  • DC Gain Linearity Error of 0.000009%
  • PSRR >120dB
  • CMRR >120dB
  • Vos is 0.1mV
  • Two package offerings

Applications:

  • High Fidelity Audio Equipment
  • High Fidelity drivers/receivers
  • 34V Industrial applications

Evaluation Board Contents:

  • Fully Assembled LME49740 Evaluation Board
  • Instructions for where to locate and download the datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LME49740NABD
Quad High Performance, High Fidelity Audio Operational AmplifierFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide81
$200.00 each1

Description:

The LME49740 is a Quad High Fidelity Audio Operational Amplifier. This Audio Amplifier offers near zero THD+N and sets a new standard for high end audio users. Nationals newest Amplifier uses state of the art circuitry and process to achieve a new class of audio performance and technology. The AC and DC parameters in this amplifier series offers users a solution well suited for the most demanding signal path applications. There are two package choices to enable all users ease of use and evaluation criteria.

The LME49740 is designed for high slew rate, low noise and high output for systems needing +/-2.5 to +/-17V functionality. The pin out is the National standard to quickly upgrade existing boards. This series is for applications such as high quality audio amplification, multi-media, imaging, line drivers/receivers and active filters. The output current is for 600Ohm loads with more than 26mA drive with THD+N over a wide voltage range.

The LME49740MABD and LME49740NABD are evaluation boards designed to establish performance and evaluation to design the best end user system. The evaluation boards include all components for a ready-to-use, stand-alone bench work.

Features:

  • Quad Audio Operational Amplifier
  • Ultra low THD+N of 0.00003%
  • 34V operation and low noise
  • 600Ohm loads
  • SNR 97dB
  • High output of 26mA
  • Gain Bandwidth Product >55MHz
  • 20uV/S Slew rate
  • DC Gain Linearity Error of 0.000009%
  • PSRR >120dB
  • CMRR >120dB
  • Vos is 0.1mV
  • Two package offerings

Applications:

  • High Fidelity Audio Equipment
  • High Fidelity drivers/receivers
  • 34V Industrial applications

Contents:

  • Fully Assembled LME49740 Evaluation Board
  • Instructions for where to locate and download the datasheet

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LME49740MA/NOPB
SOIC NARROW141260DetailN/ALME49860.zip
NSUZXYTTE#
LME49740
MA
LME49740MAX/NOPB
SOIC NARROW141260DetailN/ALME49860.zip
NSUZXYTTE#
LME49740
MA
LME49740NA/NOPB
MDIP141NADetailN/ALME49860.zip
NSUZXYYTTE#
LME49740NA

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models
N/A
 Models
LME49860.zip

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LME49740MAVIP III0155750012125003344050185
LME49740MAXVIP III0155750012125003344050185
LME49740NAVIP III0155750012125003344050185

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

[Information as of 9-Feb-2010]