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LM4548

National Semiconductor
Part Number LM4548
Manufacturer National Semiconductor
Description AC97 Codec
Published Mar 22, 2005
Detailed Description LM4548 AC ’97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound February 1999 LM4548 AC ’97 Rev 2 Codec wi...
Datasheet PDF File LM4548 PDF File

LM4548
LM4548

Overview
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.
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 ...


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