The WM8816 is a highly linear stereo volume control for audio systems offering unsurpassed distortion and noise performance, with Total Harmonic Distortion plus Noise (THD+N) at 0.001% (100dB). The design is based on resistor chains with external op-amps, which provides flexibility for the supply voltage, signal swing, noise floor and cost optmisation. The gain of each channel can be independently programmed from -111.5dB to +15.5dB through a digital serial control interface.