LM4549B Overview
The LM4549B device is an audio codec for PC systems which is fully pliant with the PC99 and performs the analog intensive functions of the AC '97 Rev 2.1 architecture. Using 18-bit sigma-delta ADCs and DACs, the LM4549B provides 90 dB of dynamic range. The LM4549B was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system.
LM4549B Key Features
- 1 pliant With AC '97 Rev 2.1
- High-Quality Sample Rate Conversion from 4 kHz
- Multiple Codec Support
- True Line Level Output with Separate Gain
- Texas Instrument's 3D Sound Stereo
- Advanced Power Management Support
- External Amplifier Power Down (EAPD) Control
- PC-Beep Passthrough to Line Out During
- Digital 3.3-V and 5-V Supply Options
- Extended Temperature: -40°C ≤ TA ≤ 85°C
LM4549B Applications
- Desktop PC Audio Systems on PCI Cards, AMR Cards, or With Motherboard Chips Sets Featuring AC Link
- Portable PC Systems as on MDC Cards, or With a Chipset or Accelerator Featuring AC Link
