The AD8139ARDZ-REEL7 is a Differential Amplifier 1 Circuit Differential, Rail-to-Rail 8-SOIC-EP manufactured by Analog Devices. The device is a single ended to differential converter, which has arail-to-rail input and output swing, making it suitable for a variety of applications. The rail-to-rail input allows for a wide dynamic range, while the rail-to-rail output allows for precise gain control. Additionally, the AD8139ARDZ-REEL7 has excellent DC performance, with excellent input offset voltage and linearity. The device is also very fast, with very low distortion across the audio band. The device is housed in a standard 8-pin SOIC-EP package, and is ideal for applications such as video amplification and audio mixing.