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LME49725
Datasheet (National Semiconductor)
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Datasheet LME49725 Datasheet (National Semiconductor)

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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
www.national.com 2
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
3 www.national.com
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
%
www.national.com 4

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
5 www.national.com
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
7 www.national.com
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
LME49725
CMRR vs Frequency VS = 4.5V, RL = 10kΩ
CMRR vs Frequency
VS = 18V, RL = 10kΩ
30034280
CMRR vs Frequency
VS = 15V, RL = 10kΩ
+PSRR vs Frequency
VS = 4.5V, RL = 2kΩ, V
RIPPLE
= 200mV
30034281
P-P
VS = 4.5V, RL = 10kΩ, V
+PSRR vs Frequency
RIPPLE
= 200mV
30034282
P-P
30034269
30034268
+PSRR vs Frequency
VS = 4.5V, RL = 600Ω, V
9 www.national.com
RIPPLE
= 200mV
P-P
30034270
LME49725
VS = 15V, RL = 2kΩ, V
+PSRR vs Frequency
RIPPLE
= 200mV
P-P
VS = 15V, RL = 10kΩ, V
+PSRR vs Frequency
RIPPLE
= 200mV
P-P
VS = 15V, RL = 600Ω, V
+PSRR vs Frequency
+PSRR vs Frequency
VS = 18V, RL = 10kΩ, V
RIPPLE
RIPPLE
= 200mV
= 200mV
30034271
P-P
30034273
P-P
VS = 18V, RL = 2kΩ, V
+PSRR vs Frequency
+PSRR vs Frequency
VS = 18V, RL = 600Ω, V
RIPPLE
RIPPLE
= 200mV
= 200mV
30034272
P-P
300342a7
P-P
30034275
www.national.com 10
30034276
LME49725
VS = 4.5V, RL = 2kΩ, V
-PSRR vs Frequency
-PSRR vs Frequency
VS = 4.5V, RL = 600Ω, V
RIPPLE
RIPPLE
= 200mV
= 200mV
P-P
30034295
P-P
VS = 4.5V, RL = 10kΩ, V
-PSRR vs Frequency
-PSRR vs Frequency
VS = 15V, RL = 2kΩ, V
RIPPLE
RIPPLE
= 200mV
= 200mV
P-P
30034296
P-P
VS = 15V, RL = 10kΩ, V
-PSRR vs Frequency
RIPPLE
= 200mV
30034297
P-P
30034299
30034298
-PSRR vs Frequency
VS = 15V, RL = 600Ω, V
11 www.national.com
RIPPLE
= 200mV
P-P
300342a0
LME49725
VS = 18V, RL = 2kΩ, V
-PSRR vs Frequency
RIPPLE
= 200mV
P-P
VS = 18V, RL = 10kΩ, V
-PSRR vs Frequency
RIPPLE
= 200mV
P-P
VS = 18V, RL = 600Ω, V
-PSRR vs Frequency
Crosstalk vs Frequency
VS = 15V, V
OUT
= 3V
= 200mV
RIPPLE
, RL = 600Ω
RMS
300342a1
P-P
300342a3
Crosstalk vs Frequency
VS = 4.5V, V
OUT
= 1.2V
Crosstalk vs Frequency
VS = 18V, V
OUT
= 3V
, RL = 600Ω
RMS
, RL = 600Ω
RMS
300342a2
30034292
30034293
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30034294
LME49725
Crosstalk vs Frequency
VS = 4.5V, V
OUT
= 1.2V
Crosstalk vs Frequency
VS = 18V, V
OUT
= 3V
RMS,
, RL = 2kΩ
RMS,
, RL = 2kΩ
30034286
CrosstalkR vs Frequency
VS = 15V, V
OUT
= 3V
Crosstalk vs Frequency
VS = 4.5V, V
OUT
= 1.2V
, RL = 2kΩ
RMS,
, RL = 10kΩ
RMS,
30034287
Crosstalk vs Frequency
VS = 4.5V, V
OUT
= 1.2V
, RL = 600Ω
RMS,
30034288
30034292
30034289
Crosstalk vs Frequency
VS = 15V, V
13 www.national.com
OUT
= 3V
, RL = 10kΩ
RMS,
30034290
LME49725
Crosstalk vs Frequency
VS = 15V, V
OUT
= 3V
, RL = 600Ω
RMS,
Crosstalk vs Frequency
VS = 18V, V
OUT
= 3V
, RL = 10kΩ
RMS
Crosstalk vs Frequency
VS = 18V, V
OUT
= 3V
IMD vs Output Voltage
VS = 15V, RL = 600Ω
, RL = 600Ω
RMS
30034293
30034294
30034291
IMD vs Output Voltage
VS = 4.5V, RL = 600Ω
30034216
IMD vs Output Voltage
VS = 18V, RL = 600Ω
30034266
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30034267
LME49725
IMD vs Output Voltage
VS = 4.5V, RL = 2kΩ
IMD vs Output Voltage
VS = 18V, RL = 2kΩ
30034210
IMD vs Output Voltage
VS = 15V, RL = 2kΩ
30034264
IMD vs Output Voltage
VS = 4.5V, RL = 10kΩ
IMD vs Output Voltage
VS = 15V, RL = 10kΩ
30034212
30034265
30034213
IMD vs Output Voltage
VS = 18V, RL = 10kΩ
30034215
15 www.national.com
LME49725
Total Quiescent Current vs Power Supply
30034246
Current Noise vs Frequency
VCC = 15V, VEE = –15V, No Load
Voltage Noise Density vs Frequency
VCC = 15V, VEE = –15V, No Load
30034247
300342a8
www.national.com 16
LME49725

Application Information

OPERATING RATINGS AND BASIC DESIGN GUIDELINES

The LME49725 has a supply voltage range from +9V to +36V single supply or ±4.5V to ±18V dual supply.
Bypass capacitors for the supplies should be placed as close to the amplifier as possible. This will help minimize any in-
ductance between the power supply and the supply pins. In addition to a 10μF capacitor, a 0.1μF capacitor is also rec­ommended.
The amplifier’s inputs lead lengths should also be as short as possible. If the op amp does not have a bypass capacitor, it may oscillate.
17 www.national.com

Demonstration Board Schematic

LME49725
30034260
www.national.com 18

Bill Of Materials For Demonstration Board (Inverting Configuration)

Description Designator Part Number Mfg
Ceramic Capacitor 0.1μF, 10% 50V 0805 SMD
Tantalum Capacitor 10μF, 10% 20V, B-size
Resistor 0Ω, 1/8W, 1% 0805 SMD
Resistor 10kΩ, 1/8W, 1% 0805 SMD
Header, 2-Pin JP1, JP2, JP3, JP4
Header, 3-Pin JP5
SMA stand-up connectors P1-P4 (Optional) 132134 Amphenol COnnex
Note: Do not stuff Jmpr2, Jmpr3, Jmpr5, and Jmpr6.
JMPR1, JMPR4, R1, R4, R6, R9 CRCW0805000020EA Vishay
C1, C2 C0805C104K3RAC7533 Kemet
C3, C4 T491B106K025AT Kemet
R2, R3, R8, R7 CRCW080510K0FKEA Vishay
LME49725
19 www.national.com

Demonstration Board Layout

LME49725
Silkscreen Layer
Top Layer
30034262
30034263
Bottom Layer
www.national.com 20
30034261

Revision History

Rev Date Description
1.0 04/03/08 Initial release.
LME49725
21 www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted

LME49725
Narrow SOIC Package
Order Number LME49725MA
NS Package Number M08A
www.national.com 22
Notes
LME49725
23 www.national.com
Notes
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LME49725 PowerWise® Dual High Performance, High Fidelity Audio Operational Amplifier
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