National Semiconductor LME49725 Technical data

April 3, 2008

LME49725
PowerWise® Dual High Performance, High Fidelity Audio
Operational Amplifier

LME49725 PowerWise® Dual High Performance, High Fidelity Audio Operational Amplifier

General 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
ishingly 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 VOS (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.

) with van-

Key Specifications

■ Power Supply Voltage Range ±4.5V to ±18V

■ THD+N

(AV = 1, V

RL = 2kΩ

RL = 600Ω

OUT

= 3V

, fIN = 1kHz)

RMS

0.00004% (typ)

0.00004% (typ)

■ Quiescent current per Amplifier 3.0mA (typ)

■ Input Noise Density 3.3nV/√Hz (typ)

■ Slew Rate

■ Gain Bandwidth Product

■ Open Loop Gain (R

= 600Ω)

L

■ Input Bias Current

■ Input Offset Voltage

■ DC Gain Linearity Error

±15V/μs (typ)

40MHz (typ)

135dB (typ)

15nA (typ)

0.5mV (typ)

0.000009% (typ)

Features

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

■

© 2008 National Semiconductor Corporation 300342 www.national.com

Connection Diagrams

LME49725

Order Number LME49725MA

See NS Package Number — M08A

LME49725 Top Mark

N — National logo

300342p0

Z — Assembly plant code

X — 1 Digit date code

TT — Die traceability
L49725 — LME49725
MA — Package code

30034255

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LME49725

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Power Supply Voltage
(VS = V+ - V-)

Storage Temperature −65°C to 150°C
Input Voltage (V-)-0.7V to (V+)+0.7V
Differential Input Voltage ±0.7V
Output Short Circuit (Note 3) Continuous

38V

ESD Rating (Note 4) 2000V
ESD Rating (Note 5)
Pins 1, 4, 7 and 8 200V
Pins 2, 3, 5 and 6 100V
Junction Temperature 150°C
Thermal Resistance

 θJA (SO)

145°C/W

Temperature Range

T

≤ TA ≤ T

MIN

MAX

Supply Voltage Range

–40°C ≤ TA ≤ 85°C
±4.5V ≤ VS ≤ ±18V

Power Dissipation Internally Limited

Electrical Characteristics for the LME49725 (Note 2) The specifications apply for V

= ±15V, R

S

L

= 2kΩ, fIN = 1kHz, TA = 25°C, unless otherwise specified.

Symbol Parameter Conditions

THD+N Total Harmonic Distortion + Noise

AV = 1, V

RL = 2kΩ

OUT

= 3V

RL = 600Ω

IMD Intermodulation Distortion

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

OUT

= 3V

rms

RMS

LME49725

Typical Limit

(Note 6) (Note 7)

0.00004

0.00004 0.0002

0.00005 %

Units

(Limits)

%
%

GBWP Gain Bandwidth Product 40 30 MHz (min)

SR Slew Rate ±15 ±10

V

FPBW Full Power Bandwidth

= 1V

OUT

referenced to output magnitude

P-P

, –3dB

7

V/μs (min)

MHz

at f = 1kHz

t

s

e

n

i

n

V

OS

ΔVOS/ΔTemp

PSRR

ISO

CH-CH

I

B

ΔIOS/ΔTemp

I

OS

V

IN-CM

Settling time

Equivalent Input Noise Voltage

Equivalent Input Noise Density

Current Noise Density

AV = –1, 10V step, CL = 100pF

0.1% error range

fBW = 20Hz to 20kHz

f = 1kHz
f = 10Hz

f = 1kHz
f = 10Hz

1.6

0.4 0.8

3.3
20

1.4

3.5

Offset Voltage ±0.5 ±1.0 mV (max)

Average Input Offset Voltage Drift vs
Temperature

Average Input Offset Voltage Shift vs
Power Supply Voltage

Channel-to-Channel Isolation

–40°C ≤ TA ≤ 85°C

ΔVS = 20V (Note 8)

fIN = 1kHz
fIN = 20kHz

0.2

120 100 dB (min)

118
112

Input Bias Current VCM = 0V ±15 ±90 nA (max)

Input Bias Current Drift vs
Temperature

–40°C ≤ TA ≤ 85°C

0.1

Input Offset Current VCM = 0V 11 65 nA (max)

Common-Mode Input Voltage Range

±13.9

5.2

(V+)-2.0
(V-)+2.0

μs

μV

RMS

(max)

 nV/√Hz

(max)

pA/√Hz
 pA/√Hz

μV/°C

dB
dB

nA/°C

V (min)
V (min)

CMRR Common-Mode Rejection –10V<Vcm<10V 120 100 dB (min)

Z

IN

Differential Input Impedance

Common Mode Input Impedance –10V<Vcm<10V 1000

30

kΩ

MΩ

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LME49725

Symbol Parameter Conditions

LME49725

A

VOL

Open Loop Voltage Gain

–10V<Vout<10V, RL = 600Ω

–10V<Vout<10V, RL = 2kΩ

–10V<Vout<10V, RL = 10kΩ

RL = 600Ω

V

OUTMAX

Maximum Output Voltage Swing

RL = 2kΩ

RL = 10kΩ

I

OUT

I

OUT-CC

Output Current

Instantaneous Short Circuit Current

RL = 600Ω, VS = ±17V

+45

fIN = 10kHz

R

OUT

Output Impedance

Closed-Loop
Open-Loop

C

LOAD

I

S

f

C

Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the
device should not be operated beyond such conditions. All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified
or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P

Note 4: Human body model, applicable std. JESD22-A114C.

Note 5: Machine model, applicable std. JESD22-A115-A.

Note 6: Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of product

characterization and are not guaranteed.

Note 7: Datasheet min/max specification limits are guaranteed by test or statistical analysis.

Note 8: PSRR is measured as follows: VOS is measured at two supply voltages, ±5V and ±15V, PSRR = |20log(ΔVOS/ΔVS)|.

Capacitive Load Drive Overshoot 100pF 16

Quiescent Current per Amplifier I

= 0mA 3.0 4.5 mA (max)

OUT

1/f Corner Frequency 120 Hz

DMAX

= (T

- TA) / θJA or the number given in Absolute Maximum Ratings, whichever is lower.

JMAX

JMAX

Typical Limit

(Note 6) (Note 7)

135 110 dB (min)

135 dB

135 dB

±13.6 ±11.5 V (min)

±13.9 V

±14.0 V

±22 mA (min)

–35

0.01
18

, θJA, and the ambient temperature, TA. The maximum

Units

(Limits)

mA
mA

Ω
Ω

%

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Typical Performance Characteristics

LME49725

THD+N vs Frequency

VS = 4.5V, V

OUT

THD+N vs Frequency

VS = 18V, V

OUT

= 1.2V

= 3V

, RL = 600Ω

RMS

, RL = 600Ω

RMS

300342a6

THD+N vs Frequency

VS = 15V, V

OUT

THD+N vs Frequency

VS = 4.5V, V

OUT

= 3V

= 1.2V

, RL = 600Ω

RMS

, RL = 2kΩ

RMS

300342b1

THD+N vs Frequency

VS = 15V, V

OUT

= 3V

, RL = 2kΩ

RMS

300342b4

300342a9

300342a4

THD+N vs Frequency

VS = 18V, V

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OUT

= 3V

, RL = 2kΩ

RMS

300342b2

LME49725

THD+N vs Frequency

VS = 4.5V, V

OUT

= 1.2V

, RL = 10kΩ

RMS

THD+N vs Frequency

VS = 15V, V

OUT

= 3V

, RL = 10kΩ

RMS

THD+N vs Frequency

VS = 18V, V

OUT

= 3V

, RL = 10kΩ

RMS

THD+N vs Output Voltage

VS = 15V, RL = 600Ω, f = 1kHz

300342a5

300342b3

300342b0

THD+N vs Output Voltage

VS = 4.5V, RL = 600Ω, f = 1kHz

30034234

THD+N vs Output Voltage

VS = 18V, RL = 600Ω, f = 1kHz

30034235

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30034236

LME49725

THD+N vs Output Voltage

VS = 4.5V, RL = 2kΩ, f = 1kHz

THD+N vs Output Voltage

VS = 18V, RL = 2kΩ, f = 1kHz

30034228

THD+N vs Output Voltage

VS = 15V, RL = 2kΩ, f = 1kHz

30034229

THD+N vs Output Voltage

VS = 4.5V, RL = 10kΩ, f = 1kHz

THD+N vs Output Voltage

VS = 15V, RL = 10kΩ, f = 1kHz

30034230

30034232

30034231

THD+N vs Output Voltage

VS = 18V, RL = 10kΩ, f = 1kHz

30034233

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LME49725

CMRR vs Frequency
VS = 4.5V, RL = 600Ω

CMRR vs Frequency

VS = 15V, RL = 600Ω

CMRR vs Frequency

VS = 15V, RL = 600Ω

CMRR vs Frequency

VS = 15V, RL = 2kΩ

30034283

30034285

30034284

CMRR vs Frequency

VS = 4.5V, RL = 2kΩ

30034277

CMRR vs Frequency

VS = 18V, RL = 2kΩ

30034278

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30034279