LM1973 Datasheet - National Semiconductor

LM1973 Pot3-Channel 76dB Audio Attenuator

The LM1973 is a digitally controlled 3-channel 76dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB *15.5dB, 1.0dB steps from 16dB *47dB, and 2.0dB steps from 48dB * 76dB, with a mute function attenuating 104dB. Its logarithmic.

LM1973 Features

* n n n n 3-wire serial interface Daisy-chain capability 104dB mute attenuation Pop and click free attenuation changes Applications n n n n n Automated studio mixing consoles Music reproduction systems Sound reinforcement systems Electronic music (MIDI) Personal computer audio control Typical Applic

LM1973_NationalSemiconductor.pdf