LME49721MAX/NOPB [TI]
High-Performance, High-Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier;型号: | LME49721MAX/NOPB |
厂家: | TEXAS INSTRUMENTS |
描述: | High-Performance, High-Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier 放大器 光电二极管 |
文件: | 总29页 (文件大小:1118K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LME49721
www.ti.com
SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013
LME49721 High-Performance, High-Fidelity Rail-to-Rail Input/Output Audio Operational
Amplifier
Check for Samples: LME49721
1
FEATURES
DESCRIPTION
The LME49721 is a low-distortion, low-noise Rail-to-
Rail Input/Output 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 LME49721 Rail-to-Rail Input/Output
operational amplifier delivers superior signal
amplification for outstanding performance. The
LME49721 combines a very high slew rate with low
THD+N to easily satisfy demanding applications. To
ensure that the most challenging loads are driven
without compromise, the LME49721 has a high slew
rate of ±8.5V/μs and an output current capability of
±9.7mA. Further, dynamic range is maximized by an
output stage that drives 10kΩ loads to within 10mV of
either power supply voltage.
2
•
Rail-to-Rail Input and Output
•
Easily Drives 10kΩ Loads to Within 10mV of
Each Power Supply Voltage
•
•
Optimized for Superior Audio Signal Fidelity
Output Short Circuit Protection
APPLICATIONS
•
Ultra High-Quality Portable Audio
Amplification
•
•
•
•
•
High-Fidelity Preamplifiers
High-Fidelity Multimedia
State-of-the-Art Phono Pre Amps
High-Performance Professional Audio
The LME49721 has a wide supply range of 2.2V to
5.5V. Over this supply range the LME49721’s input
circuitry maintains excellent common-mode and
power supply rejection, as well as maintaining its low
input bias current. The LME49721 is unity gain
stable.
High-Fidelity Equalization and Crossover
Networks
•
•
•
•
•
High-Performance Line Drivers
High-Performance Line Receivers
High-Fidelity Active Filters
DAC I–V Converter
ADC Front-End Signal Conditioning
KEY SPECIFICATIONS
•
•
•
Power Supply Voltage Range: 2.2V to 5.5V
Quiescent Current: 2.15mA (typ)
THD+N (AV = 2, VOUT = 4Vp-p, f IN = 1kHz)
–
–
RL = 2kΩ: 0.00008% (typ)
RL = 600Ω: 0.0001% (typ)
•
•
•
•
•
•
•
Input Noise Density: 4nV/√Hz (typ), @ 1kHz
Slew Rate: ±8.5V/μs (typ)
Gain Bandwidth Product: 20MHz (typ)
Open Loop Gain (RL = 600Ω): 118dB (typ)
Input Bias Current: 40fA (typ)
Input Offset Voltage: 0.3mV (typ)
PSRR: 103dB (typ)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2013, Texas Instruments Incorporated
LME49721
SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013
www.ti.com
TYPICAL CONNECTION AND PINOUT
1
2
8
+5V
V
OUTPUTA
DD
7
6
5
V
DD
INVERTING INPUT A
OUTPUTB
-
3
4
NON-INVERTING INPUT A
INVERTING INPUT B
V
IN
+
V
SS
NON-INVERTING INPUT B
V
SS
Figure 1. Buffer Amplifier
Figure 2. 8-Pin SOIC (D Package)
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS(1)(2)(3)
Power Supply Voltage (VS = V+ - V-)
Storage Temperature
Input Voltage
6V
−65°C to 150°C
(V-) - 0.7V to (V+) + 0.7V
Continuous
Output Short Circuit(4)
Power Dissipation
ESD Rating(5)
Internally Limited
2000V
ESD Rating(6)
200V
Junction Temperature
Thermal Resistance, θJA (SOIC)
Temperature Range, TMIN ≤ TA ≤ TMAX
Supply Voltage Range
150°C
165°C/W
–40°C ≤ TA ≤ 85°C
2.2V ≤ VS ≤ 5.5V
(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
(2) The Electrical Characteristics table lists ensured 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 ensured.
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(4) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature,
TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA) / θJA or the number given in Absolute Maximum Ratings,
whichever is lower.
(5) Human body model, applicable std. JESD22-A114C.
(6) Machine model, applicable std. JESD22-A115-A.
2
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SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS FOR THE LME49721
The following specifications apply for the circuit shown in Figure 1. VS = 5V, RL = 10kΩ, RSOURCE = 10Ω, fIN = 1kHz, and TA =
25°C, unless otherwise specified.
LME49721
Units
(Limits)
Symbol
Parameter
Conditions
Typical(1)
Limit(2)
AV = +1, VOUT = 2Vp-p
,
THD+N
Total Harmonic Distortion + Noise
Intermodulation Distortion
RL = 2kΩ
RL = 600Ω
0.0002
0.0002
0.001
% (max)
%
AV = +1, VOUT = 2Vp-p
Two-tone, 60Hz & 7kHz 4:1
,
IMD
0.0004
GBWP
SR
Gain Bandwidth Product
Slew Rate
20
15
MHz (min)
AV = +1
8.5
V/μs (min)
VOUT = 1VP-P, –3dB
referenced to output magnitude
at f = 1kHz
FPBW
ts
Full Power Bandwidth
2.2
MHz
ns
AV = 1, 4V step
0.1% error range
Settling time
800
.707
4
fBW = 20Hz to 20kHz,
A-weighted
μVP-P
(max)
Equivalent Input Noise Voltage
Equivalent Input Noise Density
1.13
6
en
f = 1kHz
A-weighted
nV/√Hz
(max)
In
Current Noise Density
Offset Voltage
f = 10kHz
4.0
0.3
fA/√Hz
VOS
1.5
85
mV (max)
Average Input Offset Voltage Drift vs
Temperature
ΔVOS/ΔTemp
40°C ≤ TA ≤ 85°C
1.1
μV/°C
Average Input Offset Voltage Shift vs
Power Supply Voltage
PSRR
103
dB (min)
ISOCH-CH
IB
Channel-to-Channel Isolation
Input Bias Current
fIN = 1kHz
117
40
dB
fA
VCM = VS/2
Input Bias Current Drift vs
Temperature
ΔIOS/ΔTemp
IOS
–40°C ≤ TA ≤ 85°C
48
60
fA/°C
fA
Input Offset Current
VCM = VS/2
(V+) – 0.1
(V-) + 0.1
VIN-CM
Common-Mode Input Voltage Range
V (min)
CMRR
Common-Mode Rejection
1/f Corner Frequency
VSS - 100mV < VCM < VDD + 100mV
93
70
dB (min)
Hz
2000
VSS - 200mV < VOUT < VDD + 200mV
RL = 600Ω
RL = 2kΩ
RL = 10kΩ
118
122
100
dB (min)
dB (min)
dB (min)
V (min)
V (min)
V (min)
V (min)
mA (min)
mA
AVOL
Open Loop Voltage Gain
Output Voltage Swing
130
115
VDD – 30mV
VSS + 30mV
VDD – 10mV
VSS + 10mV
9.7
VDD – 80mV
VSS + 80mV
VDD – 20mV
VSS + 20mV
9.3
RL = 600Ω
VOUTMIN
RL = 10kΩ, VS = 5.0V
RL = 250Ω, VS = 5.0V
IOUT
Output Current
IOUT-SC
Short Circuit Current
100
fIN = 10kHz
Closed-Loop
Open-Loop
ROUT
IS
Output Impedance
0.01
46
Ω
Quiescent Current per Amplifier
IOUT = 0mA
2.15
3.25
mA (max)
(1) 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 ensured.
(2) Datasheet min/max specification limits are ensured by test or statistical analysis.
Copyright © 2007–2013, Texas Instruments Incorporated
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TYPICAL PERFORMANCE CHARACTERISTICS
Graphs were taken in dual supply configuration.
THD+N vs Frequency
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 2kΩ, AV = 2
VS = ±2.5V, VOUT = 4VP-P
RL = 2kΩ, AV = 2, BW = 22kHz
0.1
0.01
0.1
0.01
0.001
0.001
0.0001
0.0001
0.00001
0.00001
20
200
2k
20k
20k
20k
20
200
2k
20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 3.
Figure 4.
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 10kΩ, AV = 2, BW = 22kHz
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 10kΩ, AV = 2
0.1
0.01
0.1
0.01
0.001
0.001
0.0001
0.00001
0.0001
0.00001
20
200
2k
20k
20
200
2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 5.
Figure 6.
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 600Ω, AV = 2, BW = 22kHz
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 600Ω, AV = 2
0.1
0.01
0.1
0.01
0.001
0.001
0.0001
0.0001
0.00001
0.00001
20
200
2k
20k
20
200
2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 7.
Figure 8.
4
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SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 2kΩ, AV = 2, BW = 22kHz
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 2kΩ, AV = 2
0.1
0.01
0.1
0.01
0.001
0.0001
0.001
0.0001
20
200
2k
20k
20k
20k
20
200
2k
20k
20k
20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 9.
Figure 10.
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 10kΩ, AV = 2, BW = 22kHz
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 10kΩ, AV = 2
0.1
0.1
0.01
0.001
0.01
0.001
0.0001
0.0001
20
200
2k
20
200
2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 11.
Figure 12.
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 600Ω, AV = 2, BW = 22kHz
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 600Ω, AV = 2
0.1
0.1
0.01
0.001
0.01
0.001
0.0001
0.0001
0.00001
0.00001
20
200
2k
20
200
2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 13.
Figure 14.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
THD+N vs Output Voltage
VS = ±1.1V
THD+N vs Output Voltage
VS = ±1.1V
RL = 2kΩ, AV = 2
RL = 10kΩ, AV = 2
0.10
0.01
0.10
0.01
0.001
0.0001
0.001
0.0001
1
100m
200m
1
100m
200m
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 15.
Figure 16.
THD+N vs Output Voltage
VS = ±1.1V
THD+N vs Output Voltage
VS = ±1.5V
RL = 600Ω, AV = 2
RL = 2kΩ, AV = 2
0.1
0.01
0.10
0.01
0.001
0.001
0.0001
0.00001
0.0001
100m
200m
1
2
1
100m
200m
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 17.
Figure 18.
THD+N vs Output Voltage
VS = ±1.5V
THD+N vs Output Voltage
VS = ±1.5V
RL = 10kΩ, AV = 2
RL = 600Ω, AV = 2
0.1
0.01
0.1
0.01
0.001
0.001
0.0001
0.0001
0.00001
0.00001
100M
200M
1
2
100m
200m
1
2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 19.
Figure 20.
6
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SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
THD+N vs Output Voltage
THD+N vs Output Voltage
VS = ±2.5V
VS = ±2.5V
RL = 2kΩ, AV = 2
0.1
RL = 10kΩ, AV = 2
0.1
0.01
0.01
0.001
0.001
0.0001
0.0001
0.00001
0.00001
100m
200m
1
2
2
3
100m
200m
1
2
3
3
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 21.
Figure 22.
THD+N vs Output Voltage
VS = ±2.5V
THD+N vs Output Voltage
VS = ±2.75V
RL = 600Ω, AV = 2
RL = 2kΩ, AV = 2
0.1
0.1
0.01
0.01
0.001
0.001
0.0001
0.00001
0.0001
0.00001
100m
200m
1
100m
200m
1
2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 23.
Figure 24.
THD+N vs Output Voltage
VS = ±2.75V
THD+N vs Output Voltage
VS = ±2.75V
RL = 10kΩ, AV = 2
RL = 600Ω, AV = 2
0.1
0.01
0.1
0.01
0.001
0.001
0.0001
0.00001
0.0001
0.00001
100m
200m
1
2
100m
200m
1
2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Figure 25.
Figure 26.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
Crosstalk vs Frequency
Crosstalk vs Frequency
VS = ±1.1V
VS = ±1.1V
VOUT = 2Vp-p
RL = 2kΩ
VOUT = 2Vp-p
RL = 10kΩ
+0
-10
-20
-30
-40
-50
+0
-10
-20
-30
-40
-50
-60
-70
-60
-70
-80
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
10k 20k
20
100 200
1k 2k
10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 27.
Figure 28.
Crosstalk vs Frequency
VS = ±1.1V
Crosstalk vs Frequency
VS = ±1.5V,
VOUT = 2Vp-p
VOUT = 2Vp-p
RL = 600Ω
RL = 2kΩ
+0
+0
-10
-20
-30
-40
-50
-10
-20
-30
-40
-50
-60
-70
-60
-70
-80
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
10k 20k
20
100 200
1k 2k
10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 29.
Figure 30.
Crosstalk vs Frequency
VS = ±1.5V
Crosstalk vs Frequency
VS = ±1.5V
VOUT = 2Vp-p
VOUT = 2Vp-p
RL = 10kΩ
RL = 600Ω
+0
-10
-20
-30
-40
-50
+0
-10
-20
-30
-40
-50
-60
-70
-60
-70
-80
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
10k 20k
20
100 200
1k 2k
10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 31.
Figure 32.
8
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
Crosstalk vs Frequency
Crosstalk vs Frequency
VS = ±2.5V
VS = ±2.5V
VOUT = 4Vp-p
RL = 2kΩ
VOUT = 4Vp-p
RL = 10kΩ
+0
+0
-10
-20
-30
-40
-50
-10
-20
-30
-40
-50
-60
-70
-60
-70
-80
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
10k 20k
10k 20k
10k 20k
20
100 200
1k 2k
10k 20k
10k 20k
10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 33.
Figure 34.
Crosstalk vs Frequency
VS = ±2.5V
Crosstalk vs Frequency
VS = ±2.75V
VOUT = 4Vp-p
RL = 600Ω
VOUT = 4Vp-p
RL = 2kΩ
+0
+0
-10
-20
-30
-40
-50
-10
-20
-30
-40
-50
-60
-70
-80
-60
-70
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
20
100 200
1k 2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 35.
Figure 36.
Crosstalk vs Frequency
VS = ±2.75V
Crosstalk vs Frequency
VS = ±2.75V
VOUT = 4Vp-p
RL = 10kΩ
VOUT = 4Vp-p
RL = 600Ω
+0
-10
-20
-30
-40
-50
+0
-10
-20
-30
-40
-50
-60
-70
-80
-60
-70
-80
-90
-90
-100
-110
-120
-130
-140
-150
-100
-110
-120
-130
-140
-150
20
100 200
1k 2k
20
100 200
1k 2k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 37.
Figure 38.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
PSRR vs Frequency
PSRR vs Frequency
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 10kΩ
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 2kΩ
0
0
-20
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
-140
10
100
1000
10000
100000
100000
100000
10
10
10
100
1000
10000
100000
100000
100000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 39.
Figure 40.
PSRR vs Frequency
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 600Ω
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 2kΩ
0
-20
-40
-60
0
-20
-40
-60
-80
-80
-100
-100
-120
-140
-120
-140
100
1000
10000
10
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 41.
Figure 42.
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 10kΩ
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 600Ω
0
-20
0
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
-140
10
100
1000
10000
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 43.
Figure 44.
10
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
PSRR vs Frequency
PSRR vs Frequency
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 10kΩ
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 2kΩ
0
0
-20
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
-140
10
10
10
100
1000
10000
100000
100000
100000
10
10
10
100
1000
10000
100000
100000
100000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 45.
Figure 46.
PSRR vs Frequency
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 600Ω
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 2kΩ
0
-20
0
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
-140
100
1000
10000
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 47.
Figure 48.
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 10kΩ
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 600Ω
0
-20
0
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
-140
100
1000
10000
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 49.
Figure 50.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
CMRR vs Frequency
CMRR vs Frequency
VS = ±1.5V
VS = ±1.5V
RL = 2kΩ
RL = 10kΩ
+0
+0
-20
-20
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
20
20
20
200
2k
20k
200k
200k
200k
20
20
20
200
2k
20k
200k
200k
200k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 51.
Figure 52.
CMRR vs Frequency
VS = ±1.5V
CMRR vs Frequency
VS = ±2.5V
RL = 600Ω
RL = 2kΩ
+0
-20
+0
-20
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
200
2k
20k
200
2k
20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 53.
Figure 54.
CMRR vs Frequency
VS = ±2.5V
CMRR vs Frequency
VS = ±2.5V
RL = 10kΩ
RL = 600Ω
+0
-20
+0
-20
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
200
2k
20k
200
2k
20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 55.
Figure 56.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
CMRR vs Frequency
CMRR vs Frequency
VS = ±2.75V
VS = ±2.75V
RL = 2kΩ
RL = 10kΩ
+0
+0
-20
-20
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
20
200
2k
20k
200k
20
200
2k
20k
200k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 57.
Figure 58.
CMRR vs Frequency
VS = ±2.75V
Output Voltage Swing Neg vs Power Supply
RL = 600Ω
RL = 2kΩ
+0
-20
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-40
-60
-80
-100
-120
-3.0
20
200
2k
20k
200k
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
SUPPLY VOLTAGE (V-)
FREQUENCY (Hz)
Figure 59.
Figure 60.
Output Voltage Swing Neg vs Power Supply
Output Voltage Swing Neg vs Power Supply
RL = 10kΩ
RL = 600Ω
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.0
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
SUPPLY VOLTAGE (V-)
SUPPLY VOLTAGE (V-)
Figure 61.
Figure 62.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Graphs were taken in dual supply configuration.
Output Voltage Swing Pos vs Power Supply
Output Voltage Swing Pos vs Power Supply
RL = 10kΩ
RL = 2kΩ
3.0
2.5
2.0
1.5
1.0
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.5
0.0
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Figure 63.
Figure 64.
Output Voltage Swing Pos vs Power Supply
Supply Current per amplifier vs Power Supply
RL = 600Ω
RL = 2kΩ, Dual Supply
3.5
3.0
2.5
2.0
1.5
1.0
0.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75
1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
POWER SUPPLY (V)
SUPPLY VOLTAGE (V)
Figure 65.
Figure 66.
Supply Current per amplifier vs Power Supply
Supply Current per amplifier vs Power Supply
RL = 10kΩ, Dual Supply
RL = 600Ω, Dual Supply
3.5
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75
1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75
POWER SUPPLY (V)
POWER SUPPLY (V)
Figure 67.
Figure 68.
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APPLICATION INFORMATION
DISTORTION MEASUREMENTS
The vanishingly low residual distortion produced by LME49721 is below the capabilities of all commercially
available equipment. This makes distortion measurements just slightly more difficult than simply connecting a
distortion meter to the amplifier's inputs and outputs. The solution. however, is quite simple: an additional
resistor. Adding this resistor extends the resolution of the distortion measurement equipment.
The LME49721's low residual is an input referred internal error. As shown in Figure 69, adding the 10Ω resistor
connected between a the amplifier's inverting and non-inverting inputs changes the amplifier's noise gain. The
result is that the error signal (distortion) is amplified by a factor of 101. Although the amplifier's closed-loop gain
is unaltered, the feedback available to correct distortion errors is reduced by 101. To ensure minimum effects on
distortion measurements, keep the value of R1 low as shown in Figure 69.
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 components that are within equipments
capabilities. This datasheet's THD+N and IMD values were generated using the above described circuit
connected to an Audio Precision System Two Cascade.
R
2
R
1
1 kW
1 kW
-
R
3
LME49721
10W
+
Distortion Signal Gain = 1 + (R2/R3)
Analyzer Input
Generator Output
Audio Precision
System Two
Cascade
Figure 69. THD+N and IMD Distortion Test Circuit with AV = 2
OPERATING RATINGS AND BASIC DESIGN GUIDELINES
The LME49721 has a supply voltage range from +2.2V to +5.5V single supply or ±1.1 to ±2.75V dual supply.
Bypassed capacitors for the supplies should be placed as close to the amplifier as possible. This will help
minimize any inductance between the power supply and the supply pins. In addition to a 10μF capacitor, a 0.1μF
capacitor is also recommended in CMOS amplifiers.
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.
BASIC AMPLIFIER CONFIGURATIONS
The LME49721 may be operated with either a single supply or dual supplies. Figure 70 shows the typical
connection for a single supply inverting amplifier. The output voltage for a single supply amplifier will be centered
around the common-mode voltage Vcm. Note: the voltage applied to the Vcm insures the output stays above
ground. Typically, the Vcm should be equal to VDD/2. This is done by putting a resistor divider ckt at this node,
see Figure 70.
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R
1
R
2
V
IN
V
DD
V
DD
-
V
OUT
R
3
V
CM
+
R
4
Figure 70. Single-Supply Inverting Op Amp
Figure 71 shows the typical connection for a dual supply inverting amplifier. The output voltage is centered on
zero.
R
2
R
V
IN
1
V
DD
-
V
OUT
+
V
SS
Figure 71. Dual-Supply Inverting Op Amp
Figure 72 shows the typical connection for the Buffer Amplifier or also called a Voltage Follower. A Buffer
Amplifier can be used to solve impedance matching problems, to reduce power consumption in the source, or to
drive heavy loads. The input impedance of the op amp is very high. Therefore, the input of the op amp does not
load down the source. The output impedance on the other hand is very low. It allows the load to either supply or
absorb energy to a circuit while a secondary voltage source dissipates energy from a circuit. The Buffer is a unity
stable amplifier, 1V/V. Although the feedback loop is tied from the output of the amplifier to the inverting input,
the gain is still positive. Note: if a positive feedback is used, the amplifier will most likely drive to either rail at the
output.
V
DD
-
V
OUT
V
IN
+
Figure 72. Buffer
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TYPICAL APPLICATIONS
AV = 34.5
F = 1 kHz
En = 0.38 μV
A Weighted
Figure 73. ANAB Preamp
Figure 74. NAB Preamp Voltage Gain vs Frequency
VO = V1–V2
Figure 75. Balanced to Single-Ended Converter
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VO = V1 + V2 − V3 − V4
Figure 76. Adder/Subtracter
Figure 77. Sine Wave Oscillator
Illustration is f0 = 1 kHz
Figure 78. Second-Order High-Pass Filter
(Butterworth)
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Illustration is f0 = 1 kHz
Figure 79. Second-Order Low-Pass Filter
(Butterworth)
Illustration is f0 = 1 kHz, Q = 10, ABP = 1
Figure 80. State Variable Filter
Figure 81. AC/DC Converter
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Figure 82. 2-Channel Panning Circuit (Pan Pot)
Figure 83. Line Driver
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Illustration is:
fL = 32 Hz, fLB = 320 Hz
fH =11 kHz, fHB = 1.1 kHz
Figure 84. Tone Control
Av = 35 dB
En = 0.33 μV
S/N = 90 dB
f = 1 kHz
A Weighted
A Weighted, VIN = 10 mV
@f = 1 kHz
Figure 85. RIAA Preamp
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Illustration is:
V0 = 101(V2 − V1)
Figure 86. Balanced Input Mic Amp
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A. See Table 1.
Figure 87. 10-Band Graphic Equalizer
Table 1. C1, C2, R1, and R2 Values for Figure 87(1)
fo (Hz)
32
C1
C2
R1
R2
0.12μF
0.056μF
0.033μF
0.015μF
8200pF
3900pF
2000pF
1100pF
510pF
4.7μF
75kΩ
68kΩ
62kΩ
68kΩ
62kΩ
68kΩ
68kΩ
62kΩ
68kΩ
51kΩ
500Ω
510Ω
510Ω
470Ω
470Ω
470Ω
470Ω
470Ω
510Ω
510Ω
64
3.3μF
125
250
500
1k
1.5μF
0.82μF
0.39μF
0.22μF
0.1μF
2k
4k
0.056μF
0.022μF
0.012μF
8k
16k
330pF
(1) At volume of change = ±12 dB Q = 1.7
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REVISION HISTORY
Rev
1.0
1.1
1.2
C
Date
Description
09/26/07
10/01/07
04/21/10
04/04/13
Initial release.
Input more info under the Buffer Amplifier.
Added the Ordering Information table.
Changed layout of National Data Sheet to TI format.
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PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
PACKAGING INFORMATION
Orderable Device
LME49721MA/NOPB
LME49721MAX/NOPB
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 85
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
ACTIVE
SOIC
SOIC
D
8
8
95
Green (RoHS
& no Sb/Br)
CU SN
CU SN
Level-1-260C-UNLIM
L49721
MA
ACTIVE
D
2500
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
-40 to 85
L49721
MA
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a
continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LME49721MAX/NOPB
SOIC
D
8
2500
330.0
12.4
6.5
5.4
2.0
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SOIC
SPQ
Length (mm) Width (mm) Height (mm)
349.0 337.0 45.0
LME49721MAX/NOPB
D
8
2500
Pack Materials-Page 2
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相关型号:
LME49722MA/NOPB
Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier 8-SOIC -40 to 85
TI
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