Datasheet Details
| Part number | LM4540 |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 298.51 KB |
| Description | AC97 Codec |
| Datasheet |
 LM4540 Datasheet
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General Description
The LM4540 is an audio codec for PC systems which performs the analog-intensive function of the Analog Codec ’97 Rev 1.03 architecture.
Using 18-Bit Σ∆ A/D and D/A converters, the LM4540 provides 90dB of dynamic range.
Key Features
- full duplex stereo A/D’s and D/A’s and an analog mixer with 2 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute control. In addition, the LM4540 provides National’s 3D Sound stereo enhancement technology. The LM4540 features AC-Link, a synchronous, fixed rate serial bus for connection to the digital AC ’97 Controller. The separation of the analog and digital functions of the AC ’97 architecture allows for system design flexibility and increased overall performance.