LM112 National Semiconductor, LM112 Datasheet

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LM112

Manufacturer Part Number
LM112
Description
Operational Amplifiers
Manufacturer
National Semiconductor
Datasheet

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Part Number:
LM1121CN
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C 1995 National Semiconductor Corporation
LM112 LM212 LM312 Operational Amplifiers
General Description
The LM112 series are micropower operational amplifiers
with very low offset-voltage and input-current errors at
least a factor of ten better than FET amplifiers over a
b
series that also use supergain transistors they differ in that
they include internal frequency compensation and have pro-
visions for offset adjustment with a single potentiometer
These amplifiers will operate on supply voltages of
g
formance is not appreciably affected over this range of volt-
ages so operation from unregulated power sources is easily
accomplished They can also be run from a single supply
like the 5V used for digital circuits
The LM112 series are the first IC amplifiers to improve reli-
ability by including overvoltage protection for the MOS com-
pensation capacitor Without this feature IC’s have been
Connection Diagram
Auxiliary Circuits
55 C to
20V drawing a quiescent current of only 300
a
125 C temperature range Similar to the LM108
Offset Balancing
TL H 7751
Order Number LM112H LM212H LM312H or LM112H 883
See NS Package Number H08C
TL H 7751– 2
Metal Can Package
g
A Per-
2V to
Top View
known to suffer catastrophic failure caused by short-dura-
tion overvoltage spikes on the supplies Unlike other inter-
nally-compensated IC amplifiers it is possible to overcom-
pensate with an external capacitor to increase stability mar-
gin
The LM212 is identical to the LM112 except that the LM212
has its performance guaranteed over a
temperature range instead of
LM312 is guaranteed over a 0 C to
range
Features
Y
Y
Y
Y
Maximum input bias current of 3 nA over temperature
Offset current less than 400 pA over temperature
Low noise
Guaranteed drift specifications
Overcompensation for Greater Stability Margin
TL H 7751 – 4
b
55 C to
a
RRD-B30M115 Printed in U S A
70 C temperature
b
September 1992
25 C to
TL H 7751 – 3
a
125 C The
a
85 C

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