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8-Channel Audio Mixer

SSM2163: Digital volume control, 63 1-dB steps Low noise (-82 dBu)-and-distortion (0.007%)

The SSM2163, a complete stereo-output monolithic mixer, accepts 8 audio inputs, controls the volume of each in sixty-three (63) 1-dB steps, and adds each input to the right, left, or both outputs under digital control. A complete voltage-input, voltage-output mixer on a single chip, it requires no external active components. It uses a standard 3-wire serial interface, and includes a Data Out terminal; this facilitates daisy chaining with additional mixer ICs to increase the number of channels. Performance includes -82 dBu of signal-to- noise ratio (0 dBu = 0.775 V rms), +10 dBu of headroom, and total harmonic distortion-plus-noise (THD+N) of 0.007% at 1 kHz, unity gain, 0 dBu. The SSM2163 can operate on +-4 to +-7 V (dual) or +5 to +15 V (single) supplies.

Typical applications include multimedia system mixing, audio mixing consoles, broadcast equipment, intercom/paging systems, and musical instruments. It is available in 28-pin plastic DIP and SOIC packages, with a range of -40 to +85°C. Price is $8 (100s). Faxcode* 1954