LM112

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 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 compensation 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 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 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 Y Y Y Y Max...