LM112 Datasheet | National Semiconductor

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 55 C to a 125 C temperature range Similar to the LM108 series that also use supergain transistors they differ in that they include internal frequency pensation and have provisions for offset adjustment with a single potentiometer These amplifiers will operate on supply voltages of g 2V to g 20V drawing a quiescent current of only 300 m A Performance is not appreciably affected over this range of voltages so operation from unregulated power sources is easily acplished 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 pensation 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-pensated IC amplifiers it is possible to overpensate 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 a 85 C temperature range instead of b55 C to a 125 C The LM312 is guaranteed over a 0 C to a 70 C temperature range Features Maximum input bias current of 3 n A over temperature Offset current less than 400 p A over temperature Low noise Guaranteed drift specifications Connection Diagram Metal Can Package TL H 7751 - 4 Top View Order Number LM112H LM212H LM312H or LM112H 883 See NS Package Number H08C Auxiliary Circuits Offset Balancing Overpensation for Greater Stability Margin TL H 7751 - 2 TL H 7751 - 3 C1995 National Semiconductor Corporation TL H 7751 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for...