LM1972 - Pot 2-Channel 78dB Audio Attenuator

National Semiconductor (now Texas Instruments)

General Description

The LM1972 is a digitally controlled 2-channel 78dB audio attenuator fabricated on a CMOS process.

47.5dB, 1.0dB steps from 48dB

78dB, 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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LM1972 pot 2-channel 78db audio attenuator by National Semiconductor (now Texas Instruments) - Datasheet Preview

Datasheet Details

Part number	LM1972
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	301.42 KB
Description	Pot 2-Channel 78dB Audio Attenuator
Datasheet	LM1972 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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LM1972 µPot 2-Channel 78dB Audio Attenuator with Mute April 1995 LM1972 µPot™ 2-Channel 78dB Audio Attenuator with Mute General Description The LM1972 is a digitally controlled 2-channel 78dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB–47.5dB, 1.0dB steps from 48dB–78dB, 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. Transitions between any attenuation settings are pop free.