This document introduces the features and characteristics of LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV products, including 2-kV ESD protection, wide supply ranges, low supply current consumption, common-mode input voltage range includes ground, allowing direct sensing near ground, low input bias and offset parameters, differential input voltage range, etc.