October 2007
LME49721
High Performance, High Fidelity Rail-to-Rail Input/Output
Audio Operational Amplifier
General 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 ad-
vanced leading-edge process technology with state-of-the-art
circuit design, the LME49721 Rail-to-Rail Input/Output oper-
ational amplifier delivers superior signal amplification for out-
standing performance. The LME49721 combines a very high
slew rate with low THD+N to easily satisfy demanding appli-
cations. 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.
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.
Key Specifications
■ Power Supply Voltage Range 2.2V to 5.5V
■ Quiescent Current 2.15mA (typ)
■
THD+N (AV = 2, VOUT = 4Vp-p, fIN = 1kHz)
RL = 2kΩ0.00008% (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)
Features
■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
■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
Typical Connection, Pinout, and Package Marking
20204909
FIGURE 1. Buffer Amplifier
20204910
Order Number LME49721MA
Se NS Package Number M08A
© 2007 National Semiconductor Corporation 202049 www.national.com
LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier
Package Marking
202049x1
NS = National Logo
Z = Assembly plant code
X = 1 Digit date code
TT = Lot traceability
L49721 = LME49721
MA = Narrow SOIC package code
www.national.com 2
LME49721
Absolute Maximum Ratings (Notes 1, 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-)6V
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 Rating (Note 4) 2000V
ESD Rating (Note 5) 200V
Junction Temperature 150°C
Thermal Resistance
θJA (SO) 165°C/W
Temperature Range
TMIN ≤ TA ≤ TMAX –40°C ≤ TA ≤ 85°C
Supply Voltage Range 2.2V ≤ VS ≤ 5.5V
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.
Symbol Parameter Conditions
LME49721 Units
(Limits)
Typical Limit
(Note 6) (Note 7)
THD+N Total Harmonic Distortion + Noise
AV = +1, VOUT = 2Vp-p,
RL = 2kΩ
RL = 600Ω
0.0002
0.0002 0.001 % (max)
IMD Intermodulation Distortion AV = +1, VOUT = 2Vp-p,
Two-tone, 60Hz & 7kHz 4:1 0.0004 %
GBWP Gain Bandwidth Product 20 15 MHz (min)
SR Slew Rate AV = +1 8.5 V/μs (min)
FPBW Full Power Bandwidth
VOUT = 1VP-P, –3dB
referenced to output magnitude
at f = 1kHz
2.2
MHz
tsSettling time AV = 1, 4V step
0.1% error range 800 ns
en
Equivalent Input Noise Voltage fBW = 20Hz to 20kHz,
A-weighted
.707 1.13 μVP-P
(max)
Equivalent Input Noise Density f = 1kHz
A-weighted
4 6 nV/√Hz
(max)
inCurrent Noise Density f = 10kHz 4.0 fA/√Hz
VOS Offset Voltage 0.3 1.5 mV (max)
ΔVOS/ΔTemp Average Input Offset Voltage Drift vs
Temperature 40°C ≤ TA ≤ 85°C 1.1 μV/°C
PSRR Average Input Offset Voltage Shift vs
Power Supply Voltage 103 85 dB (min)
ISOCH-CH Channel-to-Channel Isolation fIN = 1kHz 117 dB
IBInput Bias Current VCM = VS/2 40 fA
ΔIOS/ΔTemp Input Bias Current Drift vs
Temperature –40°C ≤ TA ≤ 85°C 48 fA/°C
IOS Input Offset Current VCM = VS/2 60 fA
VIN-CM
Common-Mode Input Voltage Range (V+) – 0.1
(V-) + 0.1 V (min)
CMRR Common-Mode Rejection VSS - 100mV < VCM < VDD + 100mV 93 70 dB (min)
1/f Corner Frequency 2000 Hz
AVOL Open Loop Voltage Gain
VSS - 200mV < VOUT < VDD + 200mV
RL = 600Ω 118 100 dB (min)
RL = 2kΩ122 dB (min)
RL = 10kΩ130 115 dB (min)
3 www.national.com
LME49721
Symbol Parameter Conditions
LME49721 Units
(Limits)
Typical Limit
(Note 6) (Note 7)
VOUTMIN Output Voltage Swing
RL = 600Ω VDD – 30mV VDD – 80mV V (min)
VSS + 30mV VSS + 80mV V (min)
RL = 10kΩ, VS = 5.0V VDD – 10mV VDD – 20mV V (min)
VSS + 10mV VSS + 20mV V (min)
IOUT Output Current RL = 250Ω, VS = 5.0V 9.7 9.3 mA (min)
IOUT-SC Short Circuit Current 100 mA
ROUT Output Impedance
fIN = 10kHz
Closed-Loop
Open-Loop
0.01
46
Ω
ISQuiescent Current per Amplifier IOUT = 0mA 2.15 3.25 mA (max)
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 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.
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.
www.national.com 4
LME49721
Typical Performance Characteristics Graphs were taken in dual supply configuration.
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 2kΩ, AV = 2, BW = 22kHz
202049t6
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 2kΩ, AV = 2
202049t5
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 10kΩ, AV = 2, BW = 22kHz
202049t8
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 10kΩ, AV = 2
202049t7
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 600Ω, AV = 2, BW = 22kHz
202049u0
THD+N vs Frequency
VS = ±2.5V, VOUT = 4VP-P
RL = 600Ω, AV = 2
202049t9
5 www.national.com
LME49721
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 2kΩ, AV = 2, BW = 22kHz
202049u2
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 2kΩ, AV = 2
202049u1
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 10kΩ, AV = 2, BW = 22kHz
202049u4
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 10kΩ, AV = 2
202049u3
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 600Ω, AV = 2, BW = 22kHz
202049u5
THD+N vs Frequency
VS = ±2.75V, VOUT = 4VP-P
RL = 600Ω, AV = 2
202049u6
www.national.com 6
LME49721
THD+N vs Output Voltage
VS = ±1.1V
RL = 2kΩ, AV = 2
202049u7
THD+N vs Output Voltage
VS = ±1.1V
RL = 10kΩ, AV = 2
202049u8
THD+N vs Output Voltage
VS = ±1.1V
RL = 600Ω, AV = 2
202049u9
THD+N vs Output Voltage
VS = ±1.5V
RL = 2kΩ, AV = 2
202049v0
THD+N vs Output Voltage
VS = ±1.5V
RL = 10kΩ, AV = 2
202049v1
THD+N vs Output Voltage
VS = ±1.5V
RL = 600Ω, AV = 2
202049v2
7 www.national.com
LME49721
THD+N vs Output Voltage
VS = ±2.5V
RL = 2kΩ, AV = 2
202049v3
THD+N vs Output Voltage
VS = ±2.5V
RL = 10kΩ, AV = 2
202049v4
THD+N vs Output Voltage
VS = ±2.5V
RL = 600Ω, AV = 2
202049v5
THD+N vs Output Voltage
VS = ±2.75V
RL = 2kΩ, AV = 2
202049v6
THD+N vs Output Voltage
VS = ±2.75V
RL = 10kΩ, AV = 2
202049v7
THD+N vs Output Voltage
VS = ±2.75V
RL = 600Ω, AV = 2
202049v8
www.national.com 8
LME49721
Crosstalk vs Frequency
VS = ±1.1V
VOUT = 2Vp-p
RL = 2kΩ
202049r4
Crosstalk vs Frequency
VS = ±1.1V
VOUT = 2Vp-p
RL = 10kΩ
202049r5
Crosstalk vs Frequency
VS = ±1.1V
VOUT = 2Vp-p
RL = 600Ω
202049r6
Crosstalk vs Frequency
VS = ±1.5V,
VOUT = 2Vp-p
RL = 2kΩ
202049k1
Crosstalk vs Frequency
VS = ±1.5V
VOUT = 2Vp-p
RL = 10kΩ
202049k2
Crosstalk vs Frequency
VS = ±1.5V
VOUT = 2Vp-p
RL = 600Ω
202049k3
9 www.national.com
LME49721
Crosstalk vs Frequency
VS = ±2.5V
VOUT = 4Vp-p
RL = 2kΩ
202049k4
Crosstalk vs Frequency
VS = ±2.5V
VOUT = 4Vp-p
RL = 10kΩ
202049k5
Crosstalk vs Frequency
VS = ±2.5V
VOUT = 4Vp-p
RL = 600Ω
202049k6
Crosstalk vs Frequency
VS = ±2.75V
VOUT = 4Vp-p
RL = 2kΩ
202049k7
Crosstalk vs Frequency
VS = ±2.75V
VOUT = 4Vp-p
RL = 10kΩ
202049k8
Crosstalk vs Frequency
VS = ±2.75V
VOUT = 4Vp-p
RL = 600Ω
202049k9
www.national.com 10
LME49721
PSRR vs Frequency
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 2kΩ
202049v9
PSRR vs Frequency
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 10kΩ
202049w0
PSRR vs Frequency
VS = ±1.1V
VRIPPLE = 200mVP-P
RL = 600Ω
202049w1
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 2kΩ
202049w2
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 10kΩ
202049w3
PSRR vs Frequency
VS = ±1.5V
VRIPPLE = 200mVP-P
RL = 600Ω
202049x4
11 www.national.com
LME49721
PSRR vs Frequency
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 2kΩ
202049w5
PSRR vs Frequency
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 10kΩ
202049w6
PSRR vs Frequency
VS = ±2.5V
VRIPPLE = 200mVP-P
RL = 600Ω
202049w7
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 2kΩ
202049w8
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 10kΩ
202049w9
PSRR vs Frequency
VS = ±2.75V
VRIPPLE = 200mVP-P
RL = 600Ω
202049x0
www.national.com 12
LME49721
CMRR vs Frequency
VS = ±1.5V
RL = 2kΩ
202049l3
CMRR vs Frequency
VS = ±1.5V
RL = 10kΩ
202049l4
CMRR vs Frequency
VS = ±1.5V
RL = 600Ω
202049l5
CMRR vs Frequency
VS = ±2.5V
RL = 2kΩ
202049l6
CMRR vs Frequency
VS = ±2.5V
RL = 10kΩ
202049l7
CMRR vs Frequency
VS = ±2.5V
RL = 600Ω
202049l8
13 www.national.com
LME49721
CMRR vs Frequency
VS = ±2.75V
RL = 2kΩ
202049l9
CMRR vs Frequency
VS = ±2.75V
RL = 10kΩ
202049m0
CMRR vs Frequency
VS = ±2.75V
RL = 600Ω
202049m1
Output Voltage Swing Neg vs Power Supply
RL = 2kΩ
202049s9
Output Voltage Swing Neg vs Power Supply
RL = 10kΩ
202049t0
Output Voltage Swing Neg vs Power Supply
RL = 600Ω
202049t1
www.national.com 14
LME49721
Output Voltage Swing Pos vs Power Supply
RL = 2kΩ
202049t2
Output Voltage Swing Pos vs Power Supply
RL = 10kΩ
202049t3
Output Voltage Swing Pos vs Power Supply
RL = 600Ω
202049t4
Supply Current per amplifier vs Power Supply
RL = 2kΩ, Dual Supply
20204953
Supply Current per amplifier vs Power Supply
RL = 10kΩ, Dual Supply
20204954
Supply Current per amplifier vs Power Supply
RL = 600Ω, Dual Supply
20204956
15 www.national.com
LME49721
Application Information
DISTORTION MEASUREMENTS
The vanishingly low residual distortion produced by
LME49721 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. howev-
er, is quite simple: an additional resistor. Adding this resistor
extends the resolution of the distortion measurement equip-
ment.
The LME49721's low residual is an input referred internal er-
ror. As shown in Figure 1, adding the 10Ω resistor connected
between athe 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 avail-
able 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 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 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.
202049x2
FIGURE 1. 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 rec-
ommended 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 2 shows the typical connection for a
single supply inverting amplifier. The output voltage for a sin-
gle 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 2.
202049n3
FIGURE 2. Single Supply Inverting Op Amp
www.national.com 16
LME49721
Figure 3 shows the typical connection for a dual supply in-
verting amplifier. The output voltage is centered on zero.
202049n2
FIGURE 3. Dual Supply Inverting Op Amp
Figure 4 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 pow-
er 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.
202049n1
FIGURE 4. Buffer
17 www.national.com
LME49721
Typical Applications
ANAB Preamp
202049n4
AV = 34.5
F = 1 kHz
En = 0.38 μV
A Weighted
NAB Preamp Voltage Gain
vs Frequency
202049n5
Balanced to Single Ended Converter
202049n6
VO = V1–V2
Adder/Subtracter
202049n7
VO = V1 + V2 − V3 − V4
Sine Wave Oscillator
202049n8
www.national.com 18
LME49721
Second Order High Pass Filter
(Butterworth)
202049n9
Illustration is f0 = 1 kHz
Second Order Low Pass Filter
(Butterworth)
202049o0
Illustration is f0 = 1 kHz
State Variable Filter
202049o1
Illustration is f0 = 1 kHz, Q = 10, ABP = 1
19 www.national.com
LME49721
AC/DC Converter
202049o2
2 Channel Panning Circuit (Pan Pot)
202049o3
Line Driver
202049o4
www.national.com 20
LME49721
Tone Control
202049o5
Illustration is:
fL = 32 Hz, fLB = 320 Hz
fH =11 kHz, fHB = 1.1 kHz
202049o6
RIAA Preamp
202049o8
Av = 35 dB
En = 0.33 μV
S/N = 90 dB
f = 1 kHz
A Weighted
A Weighted, VIN = 10 mV
@f = 1 kHz
21 www.national.com
LME49721
Balanced Input Mic Amp
202049o7
Illustration is:
V0 = 101(V2 − V1)
www.national.com 22
LME49721
10 Band Graphic Equalizer
202049p0
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 8: At volume of change = ±12 dB
Q = 1.7
Reference: “AUDIO/RADIO HANDBOOK”, National Semiconductor, 1980, Page 2–61
23 www.national.com
LME49721
Revision History
Rev Date Description
1.0 09/26/07 Initial release.
1.1 10/01/07 Input more info under the Buffer Amplifier.
www.national.com 24
LME49721
Physical Dimensions inches (millimeters) unless otherwise noted
NS Package M08A
25 www.national.com
LME49721
Notes
LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier
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.
Copyright© 2007 National Semiconductor Corporation
For the most current product information visit us at www.national.com
National Semiconductor
Americas Customer
Support Center
Email:
new.feedback@nsc.com
Tel: 1-800-272-9959
National Semiconductor Europe
Customer Support Center
Fax: +49 (0) 180-530-85-86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +49 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
National Semiconductor Asia
Pacific Customer Support Center
Email: ap.support@nsc.com
National Semiconductor Japan
Customer Support Center
Fax: 81-3-5639-7507
Email: jpn.feedback@nsc.com
Tel: 81-3-5639-7560
www.national.com
