Features: · 3-wire serial interface· Daisy-chain capability· 104dB mute attenuation·Pop and click free attenuation changesApplication· Automated studio mixing consoles·Music reproduction systems· Sound reinforcement systems· Electronic music (MIDI)· Personal computer audio controlPinoutSpecificati...
LM1973: Features: · 3-wire serial interface· Daisy-chain capability· 104dB mute attenuation·Pop and click free attenuation changesApplication· Automated studio mixing consoles·Music reproduction systems· So...
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THD | 0.0008 % |
SNR | 120 dB |
Special Features | 3 Channels, Digitally controlled audio attenuator |
Supply Min | 4.5 Volt |
Supply Max | 15 Volt |
Equivalent Input Noise | 13 uV/root(Hz) |
Separation | 110 dB |
Interface Type | Serial |
Temperature Min | 0 deg C |
Temperature Max | 70 deg C |
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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 0dB15.5dB, 1.0dB steps from 16dB47dB, and 2.0dB steps from 48dB 76dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application.
The performance of a Pot™ is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N), and high channel separation. Each Pot contains a mute function that disconnects the input signal from the output, providing a minimum attenuation of 96dB. Transitions between any attenuation settings are pop free.
The LM1973's 3-wire serial digital interface is TTL and CMOS compatible; receiving data that selects a channel and the desired attenuation level. The Data-Out pin of the LM1973 allows multiple Pots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.