FEATURES

• Gain range from -111.5dB to +15.5dB
• 0.5dB Gain step size
• Total Harmonic Distortion 0.001% (100dB) typical
• Crosstalk -110dB typical
• Input signals up to ±18V
• Zero Detection for Gain Changes
• Hardware and Software Mute
• Power On/Off Transient Suppression

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.

Audible clicks on gain changes are eliminated by changing gains only when a zero crossing has been detected in the signal. The device also features peak level detection, which can be used for Automatic Gain Control. The WM8816 operates from a single +5V supply and accepts signal input levels up to