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LM4548A - 2 Multi-Channel Audio Codec

Datasheet Summary

Description

The LM4548A is an audio codec for PC systems which is fully PC98 compliant and performs the analog intensive functions of the AC ’97 Rev 2 architecture.

Using 18-bit Sigma-Delta ADCs and DACs, the LM4548A provides 90 dB of Dynamic Range.

Features

  • full duplex stereo ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs. Each mixer input has separate gain, attenuation and mute control and the mixers drive 1 mono and 2 stereo outputs, each with attenuation and mute control. The LM4548A supports National’s 3D Sound stereo enhancement and a comprehensive sample rate conversion capability. The sample rate for the ADCs and DACs can be programmed separately with a resolution of 1 Hz to convert any rate in the range 4 kHz.

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Datasheet Details

Part number LM4548A
Manufacturer National Semiconductor
File Size 568.12 KB
Description 2 Multi-Channel Audio Codec
Datasheet download datasheet LM4548A Datasheet
Additional preview pages of the LM4548A datasheet.

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Full PDF Text Transcription

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LM4548A AC ’97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound May 2004 LM4548A AC ’97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound General Description The LM4548A is an audio codec for PC systems which is fully PC98 compliant and performs the analog intensive functions of the AC ’97 Rev 2 architecture. Using 18-bit Sigma-Delta ADCs and DACs, the LM4548A provides 90 dB of Dynamic Range. The LM4548A was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system. It features full duplex stereo ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs.
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