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LMC1983 - Digitally-Controlled Stereo Tone and Volume Circuit with Three Selectable Stereo Inputs

General Description

The LMC1983 is a monolithic integrated circuit that provides volume, balance, tone (bass and treble), loudness controls and selection between three pairs of stereo inputs.

These functions are digitally controlled through a three-wire communication interface.

Key Features

  • n Low noise and distortion Block Diagram DS011279-1 DNR ® is a registered trademark of National Semiconductor Corporation. Dolby ® is a registered trademark of Dolby Labs. © 1999 National Semiconductor Corporation DS011279 www. national. com Absolute Maximum Ratings 2) (Notes 1, If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V+.
  • GND) Voltage at any Pin.

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Full PDF Text Transcription (Reference)

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LMC1983 Digitally-Controlled Stereo Tone and Volume Circuit with Three Selectable Stereo Inputs August 1992 LMC1983 Digitally-Controlled Stereo Tone and Volume Circuit with Three Selectable Stereo Inputs General Description The LMC1983 is a monolithic integrated circuit that provides volume, balance, tone (bass and treble), loudness controls and selection between three pairs of stereo inputs. These functions are digitally controlled through a three-wire communication interface. There are two digital inputs for easy interface to other audio peripherals such as stereo decoders. The LMC1983 is designed for line level input signals (300 mV–2V) and has a maximum gain of −0.5 dB. Volume is set at minimum and tone controls are flat when supply voltage is first applied.