This document introduces the features of ADA4938-1. It is an ultra-low distortion differential ADC driver with extremely low harmonic distortion, low input voltage noise, high speed, fast settling time, fast overdrive recovery time, 1 mV typical offset voltage, external adjustable gain, differential to differential or single-ended to differential operation, adjustable output common-mode voltage, wide supply voltage range: +5 V and ±5 V, lead-free 3 mm x 3 mm LFCSP package.