Datasheet4U Logo Datasheet4U.com

LM1972 - Pot 2-Channel 78dB Audio Attenuator

Datasheet Summary

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.

Features

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

📥 Download Datasheet

Datasheet preview – LM1972

Datasheet Details

Part number LM1972
Manufacturer National Semiconductor
File Size 301.42 KB
Description Pot 2-Channel 78dB Audio Attenuator
Datasheet download datasheet LM1972 Datasheet
Additional preview pages of the LM1972 datasheet.

📁 Similar Datasheet

  • LM1972 - 2-Channel 78dB Audio Attenuator (Texas Instruments)
  • LM1971 - Digitally Controlled 62dB Audio Attenuator (Texas Instruments)
  • LM1973 - 3-Channel 76dB Audio Attenuator (Texas Instruments)
  • LM19 - TO-92 Temperature Sensor (Texas Instruments)
  • LM190E01 - TFT LCD (LG)
  • LM190E01-C4 - TFt LCD (LG)
  • LM190E02 - TFT LCD (LG)
  • LM190E02-A4 - TFt LCD (LG)
  • LM190E03 - TFT LCD (LG)
  • LM190E03-A4 - TFt LCD (LG)
Other Datasheets by National Semiconductor
  • LM1971 - Digitally Controlled 62dB Audio Attenuator
  • LM1973 - Pot3-Channel 76dB Audio Attenuator
  • LM19 - Temperature Sensor
  • LM1921 - 1 Amp Industrial Switch
  • LM193 - Low Power Low Offset Voltage Dual Comparators
  • LM194 - LM194/LM394 Supermatch Pair
  • LM1946 - LM1946 Over/Under Current Limit Diagnostic Circuit
  • LM1949 - LM1949 Injector Drive Controller

Full PDF Text Transcription

Click to expand full text
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.
Published: |