IC AMP AUDIO MONO AB HIFI 8PSOP

LME49724MR/NOPB

Manufacturer Part NumberLME49724MR/NOPB
DescriptionIC AMP AUDIO MONO AB HIFI 8PSOP
ManufacturerNational Semiconductor
LME49724MR/NOPB datasheet
 


Specifications of LME49724MR/NOPB

Amplifier TypeAudioNumber Of Circuits1
Output TypeDifferentialSlew Rate18 V/µs
Gain Bandwidth Product50MHzCurrent - Input Bias60nA
Voltage - Input Offset200µVCurrent - Supply10mA
Current - Output / Channel80mAVoltage - Supply, Single/dual (±)5 V ~ 36 V, ±2.5 V ~ 18 V
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case8-PSOPLead Free Status / RoHS StatusLead free / RoHS Compliant
-3db Bandwidth-  
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LME49724
High Performance, High Fidelity, Fully-Differential Audio
Operational Amplifier
General Description
The LME49724 is an ultra-low distortion, low noise, high slew
rate fully-differential operational amplifier optimized and fully
specified for high performance, high fidelity applications.
Combining advanced leading-edge process technology with
state of the art circuit design, the LME49724 fully-differential
audio operational amplifier delivers superior audio signal am-
plification for outstanding audio performance. The LME49724
combines extremely low voltage noise density (2.1nV/
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
LME49724 has a high slew rate of ±18V/μs and an output
current capability of ±80mA. Further, dynamic range is max-
imized by an output stage that drives 600Ω loads to 52V
while operating on a ±15V supply voltage.
The LME49724's outstanding CMRR (102dB), PSRR
(125dB), and V
(0.2mV) results in excellent operational
OS
amplifier DC performance.
The LME49724 has a wide supply range of ±2.5V to ±18V.
Over this supply range the LME49724’s input circuitry main-
tains excellent common-mode and power supply rejection, as
well as maintaining its low input bias current. The LME49724
is unity gain stable. This Fully-Differential Audio Operational
Amplifier achieves outstanding AC performance while driving
complex loads with capacitive values as high as 100pF.
Key Specifications
■ 
Power Supply Voltage Range
■ 
THD+N
(A
= 1, V
= 3V
, f
= 1kHz)
V
OUT
RMS
IN
R
= 2kΩ
L
© 2008 National Semiconductor Corporation
= 600Ω
R
L
■ 
Input Noise Density
■ 
Slew Rate
■ 
Gain Bandwidth Product
■ 
Open Loop Gain (R
■ 
Input Bias Current
Hz)
■ 
Input Offset Voltage
■ 
DC Gain Linearity Error
Features
Drives 600Ω loads with full output signal swing
P-P
Optimized for superior audio signal fidelity
Output short circuit protection
PSRR and CMRR exceed 100dB (typ)
Available in PSOP package
Applications
Ultra high quality audio amplification
High fidelity preamplifiers and active filters
Simple single-ended to differential conversion
State of the art D-to-A converters
State of the art A-to-D input amplifiers
Professional Audio
±2.5V to ±18V
High fidelity equalization and crossover networks
High performance line drivers and receivers
0.00003% (typ)
300442
November 12, 2008
0.00003% (typ)
2.1nV/
Hz (typ)
±18V/μs (typ)
50MHz (typ)
= 600Ω)
125dB (typ)
L
60nA (typ)
0.2mV (typ)
0.000009%
www.national.com

LME49724MR/NOPB Summary of contents

  • Page 1

    ... Power Supply Voltage Range ■  THD 1kHz) V OUT RMS 2kΩ L © 2008 National Semiconductor Corporation = 600Ω ■  Input Noise Density ■  Slew Rate ■  Gain Bandwidth Product ■  Open Loop Gain (R ■  Input Bias Current √ ...

  • Page 2

    Typical Application Connection Diagrams Order Number LME49724MR See NS Package Number MRA08B Ordering Information Order Number Package LME49724MR 8 lead PSOP www.national.com FIGURE 1. Typical Application Circuit 300442r4 Package DWG Transport Media # MRA08B 2 300442w9 PSOP Marking 300442r6 Top ...

  • Page 3

    Pin Descriptions Pin Name 1 V Input pin IN- Sets the output DC voltage. Internally set by a resistor divider to the V midpoint of the voltages on the V 2 OCM externally to a different voltage (50kΩ input impedance). ...

  • Page 4

    ... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Supply Voltage ( Storage Temperature Input Voltage (V EE Output Short Circuit Power Dissipation (Note 3) ESD Rating (Note 4) ESD Rating (Note 5) Electrical Characteristics and T = 25° ...

  • Page 5

    Symbol Parameter I Input Bias Current B I Input Offset Current OS Input Bias Current Drift vs ΔI /ΔTemp OS Temperature V Common-Mode Input Voltage Range IN-CM CMRR Common-Mode Rejection Differential Input Impedance Z IN Common-Mode Input Impedance OUTPUT CHARACTERISTICS ...

  • Page 6

    Typical Performance Characteristics THD+N vs Frequency V = ±2.5V 0. RMS = 600Ω, 2kΩ, 10kΩ, 80kHz THD+N vs Frequency V = ±15V Differential Input S O RMS = 600Ω, ...

  • Page 7

    THD+N vs Output Voltage = 600Ω, Differential Input V = ±2.5V 20Hz, 1kHz, 20kHz, 80kHz BW 300442t1 THD+N vs Output Voltage = 600Ω, Differential Input V = ±18V 20Hz, 1kHz, ...

  • Page 8

    THD+N vs Output Voltage V = ±2.5V 10kΩ, Differential Input 20Hz, 1kHz, 20kHz, 80kHz BW THD+N vs Output Voltage V = ±18V 10kΩ, Differential Input 20Hz, 1kHz, 20kHz, ...

  • Page 9

    THD+N vs Frequency V = ±15V Single-ended Input S O RMS = 600Ω, 2kΩ, 10kΩ, 80kHz THD+N vs Frequency V = ±18V Single-ended Input S O RMS = 600Ω, ...

  • Page 10

    THD+N vs Output Voltage V = ±2.5V 2kΩ, Single-ended Input 20Hz, 1kHz, 20kHz, 80kHz BW THD+N vs Output Voltage V = ±18V 2kΩ, Single-ended Input 20Hz, 1kHz, 20kHz, ...

  • Page 11

    PSRR vs Frequency = 600Ω, Inputs to GND V = ±2.5V 200mV , 80kHz BW RIPPLE P-P 300442u0 PSRR vs Frequency = 600Ω, Inputs to GND V = ±18V 200mV ...

  • Page 12

    PSRR vs Frequency V = ±2.5V 10kΩ, Inputs to GND 200mV RIPPLE P-P PSRR vs Frequency V = ±18V 10kΩ, Inputs to GND 200mV RIPPLE P-P CMRR vs ...

  • Page 13

    Output Voltage vs Load Resistance = 500Ω – 10kΩ ±2.5V ≤ THD+N 1%, 80kHz BW 300442w3 Output Voltage vs Load Resistance = 500Ω – 10kΩ ±18V ≤ THD+N 1%, 80kHz ...

  • Page 14

    Application Information GENERAL OPERATION The LME49724 is a fully differential amplifier with an integrat- ed common-mode reference input (V amplification provides increased noise immunity, high dy- namic range, and reduced harmonic distortion products. Differential amplifiers typically have high CMRR providing ...

  • Page 15

    SINGLE SUPPLY OPERATION The LME49724 can be operated from a single power supply, as shown in Figure 4. The supply voltage range is limited to a minimum of 5V and a maximum of 36V. The common-mode output DC voltage will ...

  • Page 16

    Value is application and converted dependent. DISTORTION MEASUREMENTS The vanishing low residual distortion produced by the LME49724 is below the capabilities of commercially available equipment. This makes distortion measurements more diffi- cult than simply connecting a distortion meter to ...

  • Page 17

    FIGURE 6. THD+N and IMD Distortion Test Circuit PERFORMANCE VARIATIONS The LME49724 has excellent performance with little variation across different supply voltages, load impedances, and input configuration (single-ended or differential). Inspection of the THD+N vs Frequency and THD+N vs Output ...

  • Page 18

    FIGURE 9. THD+N vs FREQUENCY with ±15V, 80kHz BW OUT RMS S Single-ended and Differential Input FIGURE 10. THD+N vs OUTPUT VOLTAGE with R 10kΩ 20Hz, 1kHz, 20kHz ±15V, ...

  • Page 19

    Demo Board Schematic FIGURE 14. Demonstration Board Circuit 19 300442w8 www.national.com ...

  • Page 20

    Build of Materials Designator Value 1kΩ 40.2Ω 1000pF 1 2 0.1μ ...

  • Page 21

    Revision History Rev Date 1.0 11/12/08 Description Initial release. 21 www.national.com ...

  • Page 22

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8 – Lead PSOP Package Order Number LME49724MR NS Package Number MRA08B 22 ...

  • Page 23

    Notes 23 www.national.com ...

  • Page 24

    ... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...