LM312 Datasheet
LM112/LM212/LM312 Operational Amplifiers
Download: LM312 Datasheet 
LM312
LM112/LM212/LM312 Operational Amplifiers
LM112 LM212 LM312 Operational Amplifiers
September 1992
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 B55 C To 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 Provisions For Offset Adjustment With A
single potentiometer
These Amplifiers Will Operate On Supply Voltages Of G2v To G20v Drawing A Quiescent Current Of Only
300 Ma Performance Is Not Appreciably Affected Over This Range Of Voltages 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 Reliability By Including Overvoltage
Protection For The Mos Compensation Capacitor Without This Feature Ic's Have Been
Known To Suffer Catastrophic Failure Caused By Short-duration Overvoltage Spikes On The Supplies
Unlike Other Internally-compensated Ic Amplifiers It Is Possible To Overcompensate With An External
capacitor to increase stability margin
The Lm212 Is Identical To The Lm112 Except That The Lm212 Has Its Performance Guaranteed Over A B25
C To A85 C Temperature Range Instead Of B55 C To A125 C The Lm312 Is Guaranteed Over A 0 C To 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
Top View
TL H 7751 - 4
Order Number LM112H LM212H LM312H or LM112H 883 See NS Package Number H08C
Auxiliary Circuits
Offset Balancing
Overcompensation for Greater Stability Margin
TL H 7751 - 2 C1995 National Semiconductor Corporation TL H 7751
TL H 7751 - 3 RRD-B30M115 Printed in
Absolute
MAXIMUM RATINGS
If Military Aerospace Specified Devices Are Required Please Contact The National Semiconductor Sales
Office Distributors for availability and specifications (Note 5)
Supply Voltage