LME49743 [NSC]

Quad High Performance, High Fidelity Audio Operational Amplifier; 四路高性能，高保真音频运算放大器


型号：	LME49743
厂家：	National Semiconductor
描述：	Quad High Performance, High Fidelity Audio Operational Amplifier 四路高性能，高保真音频运算放大器运算放大器
文件：	总20页 (文件大小：478K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

January 12, 2009

LME49743

Quad High Performance, High Fidelity Audio Operational

Amplifier

General Description

Key Specifications

The LME49743 is a low distortion, low noise, high slew rate

operational amplifier optimized and fully specified for high

performance, high fidelity applications. The LME49743 audio

operational amplifier delivers superior audio signal amplifica-

tion for outstanding audio performance. The LME49743 com-

bines low voltage noise density (3.5nV/√Hz) and THD+N

(0.0001%) to easily satisfy demanding audio applications. To

ensure that the most challenging loads are driven without

compromise, the LME49743 has a slew rate of ±12V/μs and

an output current capability of ±21mA.

■ꢀPower Supply Voltage Range

■ꢀTHD+N (A_V= 1, V_OUT= 3V_RMS

ꢀꢀf_IN= 1kHz)

±4.0V to ±17V

R_L= 2kΩ

0.0001% (typ)

3.5nV/√Hz (typ)

±12V/μs (typ)

30MHz (typ)

R_L= 600Ω

■ꢀInput Noise Density

■ꢀSlew Rate

■ꢀGain Bandwidth Product

■ꢀOpen Loop Gain (R_L= 600Ω)

■ꢀInput Bias Current

■ꢀInput Offset Voltage

The LME49743's outstanding CMRR(106dB), PSRR(98dB),

and V_OS(±0.15mV) give the amplifier excellent operational

amplifier DC performance.

110dB (typ)

The LME49743 has a wide supply range of ±4.0V to ±17V.

Over this supply range the LME49743’s input circuitry main-

tains excellent common-mode, power supply rejection, and

low input bias current. The LME49743 is unity gain stable.

190nA (typ)

±0.15mV (typ)

The LME49743 is available in 14–lead TSSOP.

Features

Easily drives 600Ω loads

■

Optimized for superior audio signal fidelity

Output short circuit protection

98dB (typ) PSRR and 106dB (typ) CMRR

TSSOP package

Applications

Audio amplifiers and preamplifiers

■

Professional Audio

Equalization and crossover networks

Line drivers and receivers

Active filters

■

300481

www.national.com

Connection Diagram

30048101

Order Number LME49743MT

See NS Package Number — MTC14

www.national.com

Power Dissipation

Internally Limited

750V

Absolute Maximum Ratings (Notes 1, 2)

ESD Susceptibility (Note 4)

ESD Susceptibility (Note 5)

Junction Temperature

Thermal Resistance

ꢁθ_JA(MT)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

175V

150°C

Power Supply Voltage

(V_S= V⁺- V^-)

Storage Temperature

Input Voltage

140°C/W

36V

−65°C to 150°C

Temperature Range

T_MIN≤ T_A≤ T_MAX

Supply Voltage Range

–40°C ≤ T_A≤ 85°C

±4.0V ≤ V_S≤ ± 17V

(V-)ꢀ-ꢀ0.7V to (V+)ꢀ+ꢀ0.7V

Output Short Circuit (Note 3)

Continuous

Electrical Characteristics (Notes 1, 2) The following specifications apply for V_S= ±15V, R_L= 2kΩ, f_IN= 1kHz,

and T_A= 25C, unless otherwise specified.

LME49743

Typical

Limit

Units

(Limits)

Symbol

Parameter

Conditions

(Note 6) (Notes 7,

A_V= 1, V_OUT= 3V_RMS

R_L= 2kΩ

R_L= 600Ω

THD+N

Total Harmonic Distortion + Noise

Intermodulation Distortion

0.0001

0.0002

% (max)

A_V= 1, V_OUT= 3V_RMS

IMD

0.0005

Two-tone, 60Hz & 7kHz 4:1

GBWP

Gain Bandwidth Product

Slew Rate

MHz (min)

9.5

V/μs (min)

V_OUT= 1V_P-P, –3dB

referenced to output magnitude

at f = 1kHz

FPBW

t_s

Full Power Bandwidth

MHz

A_V= 1, 10V step, C_L= 100pF

0.1% error range

Settling time

1.2

μs

Equivalent Input Noise Voltage

Equivalent Input Noise Density

f_BW= 20Hz to 20kHz

0.48

0.65

μV_RMS

e_n

f = 1kHz

f = 10Hz

3.5

6.4

4.5

ꢀnV/√Hz (max)

ꢀnV/√Hz

ꢁ

ꢀpA/√Hz

mV (max)

f = 1kHz

f = 10Hz

1.6

3.1

i_n

Current Noise Density

Offset Voltage

V_OS

±0.15

±1.0

Average Input Offset Voltage Drift vs

Temperature

ΔV_OS/ΔTemp

0.05

40°C ≤ T_A≤ 85°C

ΔV_S= 20V (Note 9)

μV/°C

Average Input Offset Voltage Shift vs

Power Supply Voltage

PSRR

dB (min)

f_IN= 1kHz

118

112

ISO_CH-CH

I_B

Channel-to-Channel Isolation

f_IN= 20kHz

Input Bias Current

V_CM= 0V

190

0.05

250

nA (max)

nA/°C

Input Bias Current Drift vs

Temperature

ΔI_OS/ΔTemp

I_OS

–40°C ≤ T_A≤ 85°C

Input Offset Current

V_CM= 0V

nA (max)

(V+)–2.0

(V-)+2.0

V (min)

V_IN-CM

CMRR

Common-Mode Input Voltage Range

±13.2

–10V<V_CM<10V

Common-Mode Rejection

106

dB (min)

kΩ

Differential Input Impedance

Common Mode Input Impedance

Z_IN

–10V<V_CM<10V

1000

110

MΩ

–10V<V_OUT<10V, R_L= 600Ω

–10V<V_OUT<10V, R_L= 2kΩ

–10V<V_OUT<10V, R_L= 10kΩ

dB (min)

110

A_VOL

Open Loop Voltage Gain

100

www.national.com

LME49743

Typical Limit

Units

(Limits)

Symbol

Parameter

Conditions

(Note 6) (Notes 7,

±12.4

±13.0

±21

±12.0

R_L= 600Ω

R_L= 2kΩ

R_L= 10kΩ

V (min)

mA (min)

V_OUTMAX

Maximum Output Voltage Swing

I_OUT

Output Current

±20

R_L= 600Ω, V_S= ±17V

+30

–38

I_OUT-CC

Short Circuit Current

f_IN= 10kHz

Closed-Loop

Open-Loop

R_OUT

Output Impedance

0.01

Ω

C_LOAD

I_S

Capacitive Load Drive Overshoot

Total Quiescent Current

100pF

I_OUT= 0mA

mA (max)

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

Note 2: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications

and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics

may degrade when the device is not operated under the listed test conditions.

Note 3: Amplifier output connected to GND, any number of amplifiers within a package.

Note 4: Human body model, 100pF discharged through a 1.5kΩ resistor.

Note 5: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage and then discharged directly into

the IC with no external series resistor (resistance of discharge path must be under 50Ω).

Note 6: Typical specifications are specified at +25ºC and represent the most likely parametric norm.

Note 7: Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level).

Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

Note 9: PSRR is measured as follows: V_OSis measured at two supply voltages, ±5V and ±15V. PSRR = |20log(ΔV_OS/ΔV_S)|.

www.national.com

Typical Performance Characteristics

THD+N vs Output Voltage

V_S= ±15V, R_L= 2kΩ, f = 1kHz

30kHz BW

THD+N vs Output Voltage

V_S= ±15V, R_L= 10kΩ, f = 1kHz

30kHz BW

300481b6

300481b7

THD+N vs Output Voltage

V_S= ±15V, R_L= 600Ω, f = 1kHz

30kHz BW

THD+N vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 2kΩ

80kHz BW

300481b8

300481b0

THD+N vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 10kΩ

80kHz BW

THD+N vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 600Ω

80kHz BW

300481b1

300481b2

www.national.com

+PSRR vs Frequency

V_S= ±15V, R_L= 2kΩ, V_RIPPLE= 200mV_PP

+PSRR vs Frequency

V_S= ±15V, R_L= 10kΩ, V_RIPPLE= 200mV_PP

300481a1

300481a2

+PSRR vs Frequency

V_S= ±15V, R_L= 600Ω, V_RIPPLE= 200mV_PP

−PSRR vs Frequency

V_S= ±15V, R_L= 2kΩ, V_RIPPLE= 200mV_PP

300481a3

300481a7

−PSRR vs Frequency

V_S= ±15V, R_L= 10kΩ, V_RIPPLE= 200mV_PP

−PSRR vs Frequency

V_S= ±15V, R_L= 600Ω, V_RIPPLE= 200mV_PP

300481a8

300481a9

www.national.com

CMRR vs Frequency

V_S= ±15V, R_L= 2kΩ, V_IN= 200mV_PP

CMRR vs Frequency

V_S= ±15V, R_L= 10kΩ, V_IN= 200mV_PP

30048190

30048189

CMRR vs Frequency

V_S= ±15V, R_L= 600Ω, V_IN= 200mV_PP

Crosstalk vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 2kΩ

30048191

300481b9

Crosstalk vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 10kΩ

Crosstalk vs Frequency

V_S= ±15V, V_OUT= 3V_RMS, R_L= 600Ω

300481c0

300481c1

www.national.com

IMD vs Output Voltage

V_S= ±5V, R_L= 2kΩ

7kHz/60Hz 4:1 SMPTE

IMD vs Output Voltage

V_S= ±5V, R_L= 10kΩ

7kHz/60Hz 4:1 SMPTE

30048195

30048196

IMD vs Output Voltage

V_S= ±5V, R_L= 600Ω

7kHz/60Hz 4:1 SMPTE

Output Voltage vs Supply Voltage

R_L= 2kΩ, THD+N = 0.1%

30048163

30048197

Output Voltage vs Supply Voltage

R_L= 10kΩ, THD+N = 0.1%

R_L= 600Ω, THD+N = 0.1%

30048165

30048164

www.national.com

Supply Current vs Supply Voltage

Scope Photo

Small Signal

300481c4

30048185

Scope Photo

Large Signal, Non-Inverting

Scope Photo

Large Signal, Inverting

30048187

30048186

Equivalent Input Noise vs Frequency

Power Bandwidth

30048188

30048192

www.national.com

Open Loop Gain and Phase

vs Frequency

30048193

www.national.com

inputs changes the amplifier’s noise gain. The result is that

the error signal (distortion) is amplified by a factor of 101. Al-

though the amplifier’s closed-loop gain is unaltered, the feed-

back available to correct distortion errors is reduced by 101,

which means that measurement resolution increases by 101.

To ensure minimum effects on distortion measurements,

keep the value of R1 low as shown in Figure 1.

Application Information

DISTORTION MEASUREMENTS

The vanishingly low residual distortion produced by

LME49743 is below the capabilities of all commercially avail-

able equipment. This makes distortion measurements just

slightly more difficult than simply connecting a distortion me-

ter to the amplifier’s inputs and outputs. The solution, how-

ever, is quite simple: an additional resistor. Adding this

resistor extends the resolution of the distortion measurement

equipment.

This technique is verified by duplicating the measurements

with high closed loop gain and/or making the measurements

at high frequencies. Doing so produces distortion compo-

nents that are within the measurement equipment’s capabili-

ties. This datasheet’s THD+N and IMD values were generat-

ed using the above described circuit connected to an Audio

Precision System Two Cascade.

The LME49743’s low residual distortion is an input referred

internal error. As shown in Figure 1, adding the 10Ω resistor

connected between the amplifier’s inverting and non-inverting

30048122

FIGURE 1. THD+N and IMD Distortion Test Circuit

www.national.com

Capacitive loads greater than 100pF must be isolated from

the output. The most straightforward way to do this is to put

a resistor in series with the output. This resistor will also pre-

vent excess power dissipation if the output is accidentally

shorted.

Application Hints

The LME49743 is a high speed op amp with excellent phase

margin and stability. Capacitive loads up to 100pF will cause

little change in the phase characteristics of the amplifiers and

are therefore allowable.

Noise Measurement Circuit

30048121

Complete shielding is required to prevent induced pick up from external sources. Always check with oscilloscope for power line noise.

Total Gain: 115 dB at f = 1 kHz

Input Referred Noise Voltage: e_n= V_O/560,000 (V)

RIAA Preamp Voltage Gain,

RIAA Deviation vs Frequency

V_IN= 10mV, A_V= 35.0dB, f = 1kHz

Flat Amp Voltage Gain vs Frequency

V_O= 0dB, A_V= 80.0dB, f = 1kHz

30048129

30048128

www.national.com

Typical Applications

State Variable Filter

30048137

AC/DC Converter

30048138

www.national.com

2 Channel Panning Circuit (Pan Pot)

Line Driver

30048140

30048139

Tone Control

30048141

30048142

www.national.com

RIAA Preamp

30048103

A_v= 35 dB

E_n= 0.33 μV

S/N = 90 dB

f = 1 kHz

A Weighted

A Weighted, V_IN= 10 mV

@f = 1 kHz

Balanced Input Mic Amp

30048143

Illustration is:

V0 = 101(V2 − V1)

www.national.com

10 Band Graphic Equalizer

30048144

fo (Hz)

C₁

C₂

R₁

R₂

0.12μF

0.056μF

0.033μF

0.015μF

8200pF

3900pF

2000pF

1100pF

510pF

4.7μF

3.3μF

75kΩ

68kΩ

62kΩ

68kΩ

62kΩ

68kΩ

62kΩ

68kΩ

51kΩ

500Ω

510Ω

470Ω

510Ω

125

250

500

1.5μF

0.82μF

0.39μF

0.22μF

0.1μF

0.056μF

0.022μF

0.012μF

16k

330pF

Note 10: At volume of change = ±12 dB

ꢀꢀQ = 1.7

ꢀꢀReference: “AUDIO/RADIO HANDBOOK”, National Semiconductor, 1980, Page 2–61

www.national.com

Revision History

Rev

1.0

Date

Description

Initial release.

Fixed a typo.

03/26/08

01/12/09

1.01

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted

Dual-In-Line Package

Order Number LME49743MT

NS Package Number MTC14

www.national.com

Notes

www.national.com

Notes

For more National Semiconductor product information and proven design tools, visit the following Web sites at:

Products

www.national.com/amplifiers

Design Support

Amplifiers

WEBENCH® Tools

App Notes

www.national.com/webench

www.national.com/appnotes

www.national.com/refdesigns

www.national.com/samples

www.national.com/evalboards

www.national.com/packaging

www.national.com/quality/green

www.national.com/contacts

Audio

www.national.com/audio

www.national.com/timing

www.national.com/adc

www.national.com/interface

www.national.com/lvds

www.national.com/power

www.national.com/switchers

www.national.com/ldo

Clock and Timing

Data Converters

Interface

Reference Designs

Samples

Eval Boards

LVDS

Packaging

Power Management

Switching Regulators

LDOs

Green Compliance

Distributors

Quality and Reliability www.national.com/quality

LED Lighting

Voltage Reference

PowerWise® Solutions

www.national.com/led

Feedback/Support

Design Made Easy

Solutions

www.national.com/feedback

www.national.com/easy

www.national.com/vref

www.national.com/powerwise

www.national.com/solutions

www.national.com/milaero

www.national.com/solarmagic

www.national.com/AU

Serial Digital Interface (SDI) www.national.com/sdi

Mil/Aero

Temperature Sensors

Wireless (PLL/VCO)

www.national.com/tempsensors Solar Magic®

www.national.com/wireless

Analog University®

THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION

(“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY

OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO

SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS,

IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS

DOCUMENT.

TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT

NATIONAL’S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL

PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR

APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND

APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE

NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS.

EXCEPT AS PROVIDED IN NATIONAL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO

LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE

AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR

PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY

RIGHT.

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR

SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and

whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected

to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform

can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.

National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other

brand or product names may be trademarks or registered trademarks of their respective holders.

For the most current product information visit us at www.national.com

National Semiconductor

Americas Technical

Support Center

Email: support@nsc.com

Tel: 1-800-272-9959

National Semiconductor Europe

Technical Support Center

Email: europe.support@nsc.com

German Tel: +49 (0) 180 5010 771

English Tel: +44 (0) 870 850 4288

National Semiconductor Asia

Pacific Technical Support Center

Email: ap.support@nsc.com

National Semiconductor Japan

Technical Support Center

Email: jpn.feedback@nsc.com

www.national.com

LME49743 [NSC]

相关型号：

LME49743MT

LME49743MT/NOPB

LME49743MTX

LME49743MTX/NOPB

LME49810

LME49810TB

LME49811

LME49811

LME49811

LME49811TB

LME49811TB/NOPB

LME49830