LM1973 - Pot3-Channel 76dB Audio Attenuator

National Semiconductor (Texas Instruments)

General Description

The LM1973 is a digitally controlled 3-channel 76dB audio attenuator fabricated on a CMOS process.

15.5dB, 1.0dB steps from 16dB 47dB, and 2.0dB steps from 48dB

76dB, with a mute function attenuating 104dB.

Key Features

n n n n 3-wire serial interface Daisy-chain capability 104dB mute attenuation Pop and click free attenuation changes.

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LM1973 pot3-channel 76db audio attenuator by National Semiconductor (Texas Instruments) - Datasheet Preview

Datasheet Details

Part number	LM1973
Manufacturer	National Semiconductor (Texas Instruments)
File Size	305.93 KB
Description	Pot3-Channel 76dB Audio Attenuator
Datasheet	LM1973 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM1973 µPot 3-Channel 76dB Audio Attenuator with Mute December 1994 LM1973 µPot™3-Channel 76dB Audio Attenuator with Mute General Description 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 attenuation curve can be customized through software to fit the desired application. The performance of a µPot™ is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N), and high channel separation. Each µPot contains a mute function that disconnects the input signal from the output, providing a minimum attenuation of 96dB.