View cs3310 datasheet:

CS3310 Stereo Digital Volume Control Features Description The CS3310 is a complete stereo digital volume control lComplete Digital Volume Control designed specifically for audio systems. It features a 16- — 2 Independent Channels bit serial interface that controls two independent, low dis- — Serial Control tortion audio channels. — 0.5 dB Step Size The CS3310 includes an array of well-matched resistors lWide Adjustable Range and a low noise active output stage that is capable of — -95.5 dB Attenuation driving a 600 ? load. A total adjustable range of 127 dB, in 0.5 dB steps, is achieved through 95.5 dB of attenua- — +31.5 dB Gain tion and 31.5 dB of gain. lLow Distortion & Noise — 0.001% THD+N The simple 3-wire interface provides daisy-chaining of multiple CS3310’s for