The FOD7840x is a family of optically-coupled isolation amplifiers. Each device consists of a gallium aluminum arsenide (GaAlAs) light emitting diode and a highly accurate sigma-delta A/D converter on the input side and a precise D/A converter with differential output on the output side. This optocoupler is used for current sensing in motor drives or general-purpose current sensing and monitoring. This family offers various gain tolerances: FOD7840A (±1% gain tolerance) and the FOD7840B (±3% gain tolerance) and FOD7840 (±5% gain tolerance).