GENERAL DESCRIPTION
The SSM2160 allows digital control of volume of six audio channels, with a master level control and individual channel controls. Low distortion VCAs (voltage controlled amplifiers) are used in the signal path. By using controlled rate-of-change drive to the VCAs, the “clicking” associated with switched resistive networks is eliminated in the master control. Each channel is controlled by a dedicated 5-bit DAC providing 32 levels of gain.

FEATURES
   Clickless Digitally Controlled Level Adjustment
      SSM2160: 6 Channels
   7-Bit Master Control Gives 128 Levels of Attenuation
   5-Bit Channel Controls Give 32 Levels of Gain
   Master/Channel Step Size Set by External Resistors
   100 dB Dynamic Range
   Automatic Power-On Mute
   Excellent Audio Characteristics:
      0.01% THD+N
      0.001% IMD (SMPTE)
      –90 dBu Noise Floor
      –80 dB Channel Separation
      90 dB SNR
   Single-and Dual-Supply Operation

APPLICATIONS
   Home Theater Receivers
   Surround Sound Decoders
   Circle Surround® and AC-3® Decoders
   DSP Soundfield™ Processors
   HDTV and Surround TV Audio Systems
   Automotive Surround Sound Systems
   Multiple Input Mixer Consoles and Amplifiers