LM343 NSC [National Semiconductor], LM343 Datasheet

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LM343

Manufacturer Part Number
LM343
Description
High Voltage Operational Amplifier
Manufacturer
NSC [National Semiconductor]
Datasheet

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C 1995 National Semiconductor Corporation
LM143 LM343 High Voltage
Operational Amplifier
General Description
The LM143 is a general purpose high voltage operational
amplifier featuring operation to
voltage protection up to
ble to those of other super- op amps Increased slew rate
together with higher common-mode and supply rejection
insure improved performance at high supply voltages Oper-
ating characteristics in particular supply current slew rate
and gain are virtually independent of supply voltage and
temperature Furthermore gain is unaffected by output
loading at high supply voltages due to thermal symmetry on
the die The LM143 is pin compatible with general purpose
op amps and has offset null capability
Application areas include those of general purpose op
amps but can be extended to higher voltages and higher
output power when externally boosted For example when
used in audio power applications the LM143 provides a
power bandwidth that covers the entire audio spectrum In
addition the LM143 can be reliably operated in environ-
ments with large overvoltage spikes on the power supplies
where other internally-compensated op amps would suffer
catastrophic failure
The LM343 is similar to the LM143 for applications in less
severe supply voltage and temperature environments
Connection Diagram
Available per SMD
7800303
g
40V and input currents compara-
TL H 7783
g
40V complete input over-
Order Number LM143H LM143H 883 or LM343H
See NS Package Number H08C
Metal Can Package
Top View
Features
Y
Y
Y
Y
Y
Unique Characteristics
Y
Y
Y
Y
Y
Y
Y
Wide supply voltage range
Large output voltage swing
Wide input common-mode range
Input overvoltage protection
Supply current is virtually independent of supply voltage
and temperature
Low input bias current
Low input offset current
High slew rate essentially independent of temperature
and supply voltage
High voltage gain virtually independent of resistive
loading temperature and supply voltage
Internally compensated for unity gain
Output short circuit protection
Pin compatible with general purpose op amps
TL H 7783 – 1
RRD-B30M115 Printed in U S A
g
February 1995
4 0V to
Full
100k min
2 5V
8 0 nA
1 0 nA
g
g
g
g
40V
37V
38V
40V
s

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LM343 Summary of contents

Page 1

... LM143 can be reliably operated in environ- ments with large overvoltage spikes on the power supplies where other internally-compensated op amps would suffer catastrophic failure The LM343 is similar to the LM143 for applications in less severe supply voltage and temperature environments Connection Diagram Order Number LM143H LM143H 883 or LM343H ...

Page 2

... Note 1 Absolute maximum ratings are not necessarily concurrent and care must be taken not to exceed the maximum junction temperature of the LM143 (150 C) or the LM343 (100 C) For operating at elevated temperatures devices in the H08 package must be derated based on a thermal resistance of 155 C W junction to ...

Page 3

Schematic Diagram 3 ...

Page 4

Typical Performance Characteristics Voltage Follower Slew Rate Unity Gain Bandwidth Common-Mode Rejection Open Loop Frequency Response Supply Current Input Noise Voltage Power Supply Rejection Voltage Follower Pulse Response 4 Short Circuit Current Input Noise Current Large Signal Frequency Response Inverter ...

Page 5

Typical Performance Characteristics Input Voltage Range Supply Current Application Hints (See AN-127) The LM143 is designed for trouble free operation at any supply voltage up to and including the guaranteed maximum of 40V Input overvoltage protection both common-mode g and ...

Page 6

Application Hints (See AN-127) (Continued) Bottom View FIGURE 1 Printed Circuit Layout for Input Guarding with TO-5 Package SOURCE FIGURE 3 Guarded Non-Inverting Amplifier SOURCE FIGURE 2 ...

Page 7

Typical Applications (For more detail see AN-127) 130 V 34V Common-Mode Instrumentation Amplifier g R2 may be adjustable to trim the gain R7 may be adjusted to compensate for the resistance tolerance of R4–R7 for best CMR The 38V supplies ...

Page 8

Typical Applications (Continued) (For more detail see AN-127) 8 ...

Page 9

Typical Applications (Continued) (For more detail see AN-127) 90W Audio Power Amplifier with Safe Area Protection Put on common heat sink 34 turns wire on a form Adjust R6 to set I 100 The ...

Page 10

Typical Applications (Continued) (For more detail see AN-127) 1 Amp Power Amplifier with Short Circuit Protection The 38V supplies allow for a 5% voltage tolerance All resistors are watt except as noted 7783 – 13 ...

Page 11

11 ...

Page 12

... Physical Dimensions inches (millimeters) Order Number LM143H LM143H 883 or LM343H LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...

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