The OPA1637 is a low-noise, low total harmonic distortion (THD), Burr-Brown™ fully differential amplifier that easily filters and drives fully differential, audio signal chains. The OPA1637 is also used to convert single-ended sources to differential outputs required by high-fidelity analog-to-digital converters (ADCs). Designed for exceptional low noise and THD, the bipolar super-beta inputs yield a very low noise figure at very-low quiescent current and input bias current. This device is designed for audio circuits where low power consumption is required along with excellent signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR).