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LM4548 - AC97 Codec

General Description

The LM4548 is an audio codec for PC systems which is fully PC98 compliant and performs the analog intensive functions of the AC97 Rev2 architecture.

Using 18-bit Sigma-Delta A/D’s and D/A’s, the LM4548 provides 90dB of Dynamic Range.

Key Features

  • full duplex stereo A/D’s and D/A’s and an analog mixer with 4 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute control. The LM4548 also provides the additional True Line-Level output and National’s 3D Sound stereo enhancement. The LM4548 supports variable sample rate conversion as defined in the AC97 Rev2 specification. The sample rate for the A/D and D/A can be programmed separately to convert any rate between 4kHz - 48kHz with a resolution of 1Hz. The AC97 archit.

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📁 Similar Datasheet

Part Number Description Manufacturer
LM4548 AC97 Rev2 Codec Texas Instruments
LM4548A AC97 Rev2 Multi-Channel Codec Texas Instruments
LM4546 AC97 Rev2 Codec Texas Instruments
LM4546A AC97 Rev2 Multi-Channel Audio Codec Texas Instruments
LM4546B Multi-Channel Audio Codec Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM4548A 2 Multi-Channel Audio Codec
LM4540 AC97 Codec
LM4543 AC97 Codec
LM4545 AC97 Codec
LM4546 AC97 Codec

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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LM4548 AC ’97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound February 1999 LM4548 AC ’97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound General Description The LM4548 is an audio codec for PC systems which is fully PC98 compliant and performs the analog intensive functions of the AC97 Rev2 architecture. Using 18-bit Sigma-Delta A/D’s and D/A’s, the LM4548 provides 90dB of Dynamic Range. The LM4548 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 A/D’s and D/A’s and an analog mixer with 4 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute control.