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LM112 データシート(PDF) 2 Page - Texas Instruments

部品番号 LM112
部品情報  Operational Amplifiers
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LM112 データシート(HTML) 2 Page - Texas Instruments

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TLH7751
September 1992
LM112LM212LM312 Operational Amplifiers
General Description
The LM112 series are micropower operational amplifiers
with very low offset-voltage and input-current errorsat
least a factor of ten better than FET amplifiers over a
b
55 Cto a125 C temperature range Similar to the LM108
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 g2V to
g
20V drawing a quiescent current of only 300 mA Per-
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
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 b25 Cto a85 C
temperature range instead of b55 Cto a125 C The
LM312 is guaranteed over a 0 Cto a70 C temperature
range
Features
Y
Maximum input bias current of 3 nA over temperature
Y
Offset current less than 400 pA over temperature
Y
Low noise
Y
Guaranteed drift specifications
Connection Diagram
Metal Can Package
TLH7751 – 4
Top View
Order Number LM112H LM212H LM312H or LM112H883
See NS Package Number H08C
Auxiliary Circuits
Offset Balancing
TLH7751 – 2
Overcompensation for Greater Stability Margin
TLH7751 – 3
C1995 National Semiconductor Corporation
RRD-B30M115Printed in U S A


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