LM4562
January 26, 2010
Dual High Performance, High Fidelity Audio Operational
Amplifier
General Description
The LM4562 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 LM4562 audio operational
amplifiers deliver superior audio signal amplification for out-
standing audio performance. The LM4562 combines ex-
tremely low voltage noise density (2.7nV/√Hz) with vanish-
ingly low THD+N (0.00003%) to easily satisfy the most
demanding audio applications. To ensure that the most chal-
lenging loads are driven without compromise, the LM4562
has a high slew rate of ±20V/μs and an output current capa-
bility of ±26mA. 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.
The LM4562's outstanding CMRR (120dB), PSRR (120dB),
and VOS (0.1mV) give the amplifier excellent operational am-
plifier DC performance.
The LM4562 has a wide supply range of ±2.5V to ±17V. Over
this supply range the LM4562’s input circuitry maintains ex-
cellent common-mode and power supply rejection, as well as
maintaining its low input bias current. The LM4562 is unity
gain stable. This Audio Operational Amplifier achieves out-
standing AC performance while driving complex loads with
values as high as 100pF.
The LM4562 is available in 8–lead narrow body SOIC, 8–lead
Plastic DIP, and 8–lead Metal Can TO-99. Demonstration
boards are available for each package.
Key Specifications
■ Power Supply Voltage Range ±2.5V to ±17V
■
THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz)
RL = 2kΩ0.00003% (typ)
RL = 600Ω 0.00003% (typ)
■ Input Noise Density 2.7nV/√Hz (typ)
■ Slew Rate ±20V/μs (typ)
■ Gain Bandwidth Product 55MHz (typ)
■ Open Loop Gain (RL = 600Ω) 140dB (typ)
■ Input Bias Current 10nA (typ)
■ Input Offset Voltage 0.1mV (typ)
■ DC Gain Linearity Error 0.000009%
Features
■Easily drives 600Ω loads
■Optimized for superior audio signal fidelity
■Output short circuit protection
■PSRR and CMRR exceed 120dB (typ)
■SOIC, DIP, TO-99 metal can packages
Applications
■Ultra high quality audio amplification
■High fidelity preamplifiers
■High fidelity multimedia
■State of the art phono pre amps
■High performance professional audio
■High fidelity equalization and crossover networks
■High performance line drivers
■High performance line receivers
■High fidelity active filters
Typical Application
201572k5
Passively Equalized RIAA Phono Preamplifier
© 2010 National Semiconductor Corporation 201572 www.national.com
LM4562 Dual High Performance, High Fidelity Audio Operational Amplifier
Connection Diagrams
20157255
Order Number LM4562MA
See NS Package Number — M08A
Order Number LM4562NA
See NS Package Number — N08E
Metal Can
201572f3
Order Number LM4562HA
See NS Package Number — H08C
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LM4562
Absolute Maximum Ratings (Note 1, Note
2)
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-)36V
Storage Temperature −65°C to 150°C
Input Voltage (V-) - 0.7V to (V+) + 0.7V
Output Short Circuit (Note 3) Continuous
Power Dissipation Internally Limited
ESD Susceptibility (Note 4) 2000V
ESD Susceptibility (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
θJA (NA) 102°C/W
θJA (HA) 150°C/W
θJC (HA) 35°C/W
Temperature Range
TMIN ≤ TA ≤ TMAX –40°C ≤ TA ≤ 85°C
Supply Voltage Range ±2.5V ≤ VS ≤ ± 17V
Electrical Characteristics for the LM4562 (Note 1, Note 2) The specifications apply for VS = ±15V,
RL = 2kΩ, fIN = 1kHz, TA = 25°C, unless otherwise specified.
Symbol Parameter Conditions
LM4562 Units
(Limits)
Typical Limit
(Note 6) (Note 7)
THD+N Total Harmonic Distortion + Noise
AV = 1, VOUT = 3Vrms
RL = 2kΩ
RL = 600Ω
0.00003
0.00003 0.00009
% (max)
IMD Intermodulation Distortion AV = 1, VOUT = 3VRMS
Two-tone, 60Hz & 7kHz 4:1 0.00005 %
GBWP Gain Bandwidth Product 55 45 MHz (min)
SR Slew Rate ±20 ±15 V/μs (min)
FPBW Full Power Bandwidth
VOUT = 1VP-P, –3dB
referenced to output magnitude
at f = 1kHz
10
MHz
tsSettling time AV = –1, 10V step, CL = 100pF
0.1% error range 1.2 μs
en
Equivalent Input Noise Voltage fBW = 20Hz to 20kHz 0.34 0.65 μVRMS
(max)
Equivalent Input Noise Density f = 1kHz
f = 10Hz
2.7
6.4
4.7 nV/√Hz
(max)
inCurrent Noise Density f = 1kHz
f = 10Hz
1.6
3.1
pA/√Hz
VOS Offset Voltage ±0.1 ±0.7 mV (max)
ΔVOS/ΔTemp Average Input Offset Voltage Drift vs
Temperature –40°C ≤ TA ≤ 85°C 0.2 μV/°C
PSRR Average Input Offset Voltage Shift vs
Power Supply Voltage ΔVS = 20V (Note 8) 120 110 dB (min)
ISOCH-CH Channel-to-Channel Isolation fIN = 1kHz
fIN = 20kHz
118
112
dB
IBInput Bias Current VCM = 0V 10 72 nA (max)
ΔIOS/ΔTemp Input Bias Current Drift vs
Temperature –40°C ≤ TA ≤ 85°C 0.1 nA/°C
IOS Input Offset Current VCM = 0V 11 65 nA (max)
VIN-CM
Common-Mode Input Voltage Range +14.1
–13.9
(V+) – 2.0
(V-) + 2.0 V (min)
CMRR Common-Mode Rejection –10V<Vcm<10V 120 110 dB (min)
ZIN
Differential Input Impedance 30 kΩ
Common Mode Input Impedance –10V<Vcm<10V 1000 MΩ
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LM4562
Symbol Parameter Conditions
LM4562 Units
(Limits)
Typical Limit
(Note 6) (Note 7)
AVOL Open Loop Voltage Gain
–10V<Vout<10V, RL = 600Ω 140 125
dB (min)
–10V<Vout<10V, RL = 2kΩ140
–10V<Vout<10V, RL = 10kΩ140
VOUTMAX Maximum Output Voltage Swing
RL = 600Ω ±13.6 ±12.5
V (min)
RL = 2kΩ±14.0
RL = 10kΩ±14.1
IOUT Output Current RL = 600Ω, VS = ±17V ±26 ±23 mA (min)
IOUT-CC Instantaneous Short Circuit Current +53
–42
mA
ROUT Output Impedance
fIN = 10kHz
Closed-Loop
Open-Loop
0.01
13
Ω
CLOAD Capacitive Load Drive Overshoot 100pF 16 %
ISTotal Quiescent Current IOUT = 0mA 10 12 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: PSRR is measured as follows: VOS is measured at two supply voltages, ±5V and ±15V. PSRR = | 20log(ΔVOS/ΔVS) |.
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LM4562
Typical Performance Characteristics
THD+N vs Output Voltage
VCC = 15V, VEE = –15V
RL = 2kΩ
201572k6
THD+N vs Output Voltage
VCC = 12V, VEE = –12V
RL = 2kΩ
201572k7
THD+N vs Output Voltage
VCC = 17V, VEE = –17V
RL = 2kΩ
201572k8
THD+N vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 2kΩ
201572i4
THD+N vs Output Voltage
VCC = 15V, VEE = –15V
RL = 600Ω
201572k9
THD+N vs Output Voltage
VCC = 12V, VEE = –12V
RL = 600Ω
201572l0
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LM4562
THD+N vs Output Voltage
VCC = 17V, VEE = –17V
RL = 600Ω
201572l1
THD+N vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 600Ω
201572i6
THD+N vs Output Voltage
VCC = 15V, VEE = –15V
RL = 10kΩ
201572l2
THD+N vs Output Voltage
VCC = 12V, VEE = –12V
RL = 10kΩ
201572l3
THD+N vs Output Voltage
VCC = 17V, VEE = –17V
RL = 10kΩ
201572l4
THD+N vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 10kΩ
201572i5
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LM4562
THD+N vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
RL = 2kΩ
20157263
THD+N vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
RL = 2kΩ
20157262
THD+N vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
RL = 2kΩ
20157264
THD+N vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
RL = 600Ω
20157259
THD+N vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
RL = 600Ω
201572k3
THD+N vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
RL = 600Ω
20157260
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LM4562
THD+N vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
RL = 10kΩ
20157267
THD+N vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
RL = 10kΩ
20157266
THD+N vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
RL = 10kΩ
20157268
IMD vs Output Voltage
VCC = 15V, VEE = –15V
RL = 2kΩ
201572e6
IMD vs Output Voltage
VCC = 12V, VEE = –12V
RL = 2kΩ
201572e5
IMD vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 2kΩ
201572e4
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LM4562
IMD vs Output Voltage
VCC = 17V, VEE = –17V
RL = 2kΩ
201572e7
IMD vs Output Voltage
VCC = 15V, VEE = –15V
RL = 600Ω
201572e2
IMD vs Output Voltage
VCC = 12V, VEE = –12V
RL = 600Ω
201572e0
IMD vs Output Voltage
VCC = 17V, VEE = –17V
RL = 600Ω
201572e3
IMD vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 600Ω
201572e1
IMD vs Output Voltage
VCC = 15V, VEE = –15V
RL = 10kΩ
201572f1
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LM4562
IMD vs Output Voltage
VCC = 12V, VEE = –12V
RL = 10kΩ
201572f0
IMD vs Output Voltage
VCC = 17V, VEE = –17V
RL = 10kΩ
201572f2
IMD vs Output Voltage
VCC = 2.5V, VEE = –2.5V
RL = 10kΩ
201572l6
Voltage Noise Density vs Frequency
201572h6
Current Noise Density vs Frequency
201572h7
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
AV = 0dB, RL = 2kΩ
201572c8
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LM4562
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 10VRMS
AV = 0dB, RL = 2kΩ
201572c9
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
AV = 0dB, RL = 2kΩ
201572c6
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 10VRMS
AV = 0dB, RL = 2kΩ
201572c7
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
AV = 0dB, RL = 2kΩ
201572d0
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 10VRMS
AV = 0dB, RL = 2kΩ
201572d1
Crosstalk vs Frequency
VCC = 2.5V, VEE = –2.5V, VOUT = 1VRMS
AV = 0dB, RL = 2kΩ
201572n8
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LM4562
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
AV = 0dB, RL = 600Ω
201572d6
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 10VRMS
AV = 0dB, RL = 600Ω
201572d7
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
AV = 0dB, RL = 600Ω
201572d4
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 10VRMS
AV = 0dB, RL = 600Ω
201572d5
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
AV = 0dB, RL = 600Ω
201572d8
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 10VRMS
AV = 0dB, RL = 600Ω
201572d9
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LM4562
Crosstalk vs Frequency
VCC = 2.5V, VEE = –2.5V, VOUT = 1VRMS
AV = 0dB, RL = 600Ω
201572d2
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 3VRMS
AV = 0dB, RL = 10kΩ
201572o0
Crosstalk vs Frequency
VCC = 15V, VEE = –15V, VOUT = 10VRMS
AV = 0dB, RL = 10kΩ
201572n7
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 3VRMS
AV = 0dB, RL = 10kΩ
201572n9
Crosstalk vs Frequency
VCC = 12V, VEE = –12V, VOUT = 10VRMS
AV = 0dB, RL = 10kΩ
201572n6
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 3VRMS
AV = 0dB, RL = 10kΩ
201572n5
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LM4562
Crosstalk vs Frequency
VCC = 17V, VEE = –17V, VOUT = 10VRMS
AV = 0dB, RL = 10kΩ
201572n3
Crosstalk vs Frequency
VCC = 2.5V, VEE = –2.5V, VOUT = 1VRMS
AV = 0dB, RL = 10kΩ
201572n4
PSRR+ vs Frequency
VCC = 15V, VEE = –15V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p1
PSRR- vs Frequency
VCC = 15V, VEE = –15V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p4
PSRR+ vs Frequency
VCC = 15V, VEE = –15V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p2
PSRR- vs Frequency
VCC = 15V, VEE = –15V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p5
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LM4562
PSRR+ vs Frequency
VCC = 15V, VEE = –15V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572p0
PSRR- vs Frequency
VCC = 15V, VEE = –15V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572p3
PSRR+ vs Frequency
VCC = 12V, VEE = –12V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p7
PSRR– vs Frequency
VCC = 12V, VEE = –12V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q0
PSRR+ vs Frequency
VCC = 12V, VEE = –12V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572p8
PSRR– vs Frequency
VCC = 12V, VEE = –12V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q1
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LM4562
PSRR+ vs Frequency
VCC = 12V, VEE = –12V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572p6
PSRR– vs Frequency
VCC = 12V, VEE = –12V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572p9
PSRR+ vs Frequency
VCC = 17V, VEE = –17V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q9
PSRR– vs Frequency
VCC = 17V, VEE = –17V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572r2
PSRR+ vs Frequency
VCC = 17V, VEE = –17V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572r0
PSRR– vs Frequency
VCC = 17V, VEE = –17V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572r3
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LM4562
PSRR+ vs Frequency
VCC = 17V, VEE = –17V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572q8
PSRR– vs Frequency
VCC = 17V, VEE = –17V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572r1
PSRR+ vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q3
PSRR– vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 10kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q6
PSRR+ vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q4
PSRR– vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 2kΩ, f = 200kHz, VRIPPLE = 200mVpp
201572q7
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LM4562
PSRR+ vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572q2
PSRR– vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 600Ω, f = 200kHz, VRIPPLE = 200mVpp
201572q5
CMRR vs Frequency
VCC = 15V, VEE = –15V
RL = 2kΩ
201572g0
CMRR vs Frequency
VCC = 12V, VEE = –12V
RL = 2kΩ
201572f7
CMRR vs Frequency
VCC = 17V, VEE = –17V
RL = 2kΩ
201572g3
CMRR vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 2kΩ
201572f4
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LM4562
CMRR vs Frequency
VCC = 15V, VEE = –15V
RL = 600Ω
201572o9
CMRR vs Frequency
VCC = 12V, VEE = –12V
RL = 600Ω
201572f9
CMRR vs Frequency
VCC = 17V, VEE = –17V
RL = 600Ω
201572g5
CMRR vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 600Ω
201572f6
CMRR vs Frequency
VCC = 15V, VEE = –15V
RL = 10kΩ
201572o8
CMRR vs Frequency
VCC = 12V, VEE = –12V
RL = 10kΩ
201572f8
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LM4562
CMRR vs Frequency
VCC = 17V, VEE = –17V
RL = 10kΩ
201572g4
CMRR vs Frequency
VCC = 2.5V, VEE = –2.5V
RL = 10kΩ
201572f5
Output Voltage vs Load Resistance
VDD = 15V, VEE = –15V
THD+N = 1%
201572h1
Output Voltage vs Load Resistance
VDD = 12V, VEE = –12V
THD+N = 1%
201572h0
Output Voltage vs Load Resistance
VDD = 17V, VEE = –17V
THD+N = 1%
201572h2
Output Voltage vs Load Resistance
VDD = 2.5V, VEE = –2.5V
THD+N = 1%
201572g9
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LM4562
Output Voltage vs Supply Voltage
RL = 2kΩ, THD+N = 1%
201572j9
Output Voltage vs Supply Voltage
RL = 600Ω, THD+N = 1%
201572j8
Output Voltage vs Supply Voltage
RL = 10kΩ, THD+N = 1%
201572k0
Supply Current vs Supply Voltage
RL = 2kΩ
201572j6
Supply Current vs Supply Voltage
RL = 600Ω
201572j5
Supply Current vs Supply Voltage
RL = 10kΩ
201572j7
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LM4562
Full Power Bandwidth vs Frequency
201572j0
Gain Phase vs Frequency
201572j1
Small-Signal Transient Response
AV = 1, CL = 10pF
201572i7
Small-Signal Transient Response
AV = 1, CL = 100pF
201572i8
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LM4562
Application Information
DISTORTION MEASUREMENTS
The vanishingly low residual distortion produced by LM4562
is below the capabilities of all commercially available equip-
ment. 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 LM4562’s low residual distortion is an input referred in-
ternal error. As shown in Figure 1, adding the 10Ω resistor
connected between 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. 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.
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.
201572k4
FIGURE 1. THD+N and IMD Distortion Test Circuit
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LM4562
The LM4562 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.
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.
20157227
Complete shielding is required to prevent induced pick up from external sources. Always check with oscilloscope for power line noise.
Noise Measurement Circuit
Total Gain: 115 dB @f = 1 kHz
Input Referred Noise Voltage: en = V0/560,000 (V)
RIAA Preamp Voltage Gain, RIAA
Deviation vs Frequency
20157228
Flat Amp Voltage Gain vs
Frequency
20157229
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LM4562
TYPICAL APPLICATIONS
NAB Preamp
20157230
AV = 34.5
F = 1 kHz
En = 0.38 μV
A Weighted
NAB Preamp Voltage Gain
vs Frequency
20157231
Balanced to Single Ended Converter
20157232
VO = V1–V2
Adder/Subtracter
20157233
VO = V1 + V2 − V3 − V4
Sine Wave Oscillator
20157234
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LM4562
Second Order High Pass Filter
(Butterworth)
20157235
Illustration is f0 = 1 kHz
Second Order Low Pass Filter
(Butterworth)
20157236
Illustration is f0 = 1 kHz
State Variable Filter
20157237
Illustration is f0 = 1 kHz, Q = 10, ABP = 1
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LM4562
AC/DC Converter
20157238
2 Channel Panning Circuit (Pan Pot)
20157239
Line Driver
20157240
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LM4562
Tone Control
20157241
Note: The equations started above are simplifications, providing guidance of general –3dB point values, when the potentiometers are at their null position.
Illustration is:
fL ≈ 32 Hz, fLB ≈ 320 Hz
fH ≈ 11 kHz, fHB ≈ 1.1 kHz
20157242
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LM4562
RIAA Preamp
20157203
Av = 35 dB
En = 0.33 μV
S/N = 90 dB
f = 1 kHz
A Weighted
A Weighted, VIN = 10 mV
@f = 1 kHz
Balanced Input Mic Amp
20157243
Illustration is:
V0 = 101(V2 − V1)
29 www.national.com
LM4562
10 Band Graphic Equalizer
20157244
fo (Hz) C1C2R1R2
32 0.12μF4.7μF 75kΩ 500Ω
64 0.056μF3.3μF 68kΩ 510Ω
125 0.033μF1.5μF 62kΩ 510Ω
250 0.015μF0.82μF 68kΩ 470Ω
500 8200pF 0.39μF 62kΩ 470Ω
1k 3900pF 0.22μF 68kΩ 470Ω
2k 2000pF 0.1μF 68kΩ 470Ω
4k 1100pF 0.056μF 62kΩ 470Ω
8k 510pF 0.022μF 68kΩ 510Ω
16k 330pF 0.012μF 51kΩ 510Ω
Note 9: At volume of change = ±12 dB
Q = 1.7
Reference: “AUDIO/RADIO HANDBOOK”, National Semiconductor, 1980, Page 2–61
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LM4562
Revision History
Rev Date Description
1.0 08/16/06 Initial release.
1.1 08/22/06 Updated the Instantaneous Short Circuit Current specification.
1.2 09/12/06 Updated the three ±15V CMRR Typical Performance Curves.
1.3 09/26/06 Updated interstage filter capacitor values on page 1 Typical Application
schematic.
1.4 05/03/07 Added the “general note” under the EC table.
1.5 10/17/07 Replaced all the PSRR curves.
1.6 01/26/10 Edited the equations on page 28 (under Tone Control).
31 www.national.com
LM4562
Physical Dimensions inches (millimeters) unless otherwise noted
Narrow SOIC Package
Order Number LM4562MA
NS Package Number M08A
Dual-In-Line Package
Order Number LM4562NA
NS Package Number N08E
www.national.com 32
LM4562
TO-99 Metal Can Package
Order Number LM4562HA
NS Package Number H08C
33 www.national.com
LM4562
Notes
LM4562 Dual High Performance, High Fidelity Audio Operational Amplifier
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