Datasheet
| Obsolete Part | Alternate Part or
Supplier | Source | Last Time Buy Date |
LM4548AVH
| LM4549BVH
| NATIONAL SEMICONDUCTOR
| 01 Jun 2006
|
LM4548AVHX
| LM4549BVHX
| NATIONAL SEMICONDUCTOR
| 01 Jun 2006
|
LM4548VH
| NONE
| NATIONAL SEMICONDUCTOR
| 25 Oct 2005
|
LM4548VHX
| NONE
| NATIONAL SEMICONDUCTOR
| 25 Oct 2005
|
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 rate between 4kHz - 48kHz with a resolution of 1Hz. The AC97 architecture separates the analog and digital functions of the PC audio system allowing both for system design flexibility and increased performance.
More Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1528: Application Note 1528 Using AC'97 Codecs in Non-PC Systems |
164 Kbytes |
16-Mar-07 |
Download |
AN-1528 (Chinese): Application Note 1528 Using AC'97 Codecs in Non-PC Systems
|
483 Kbytes |
|
 |
[Information as of 8-Nov-2009]
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