LM4550B Overview
The LM4550B device is an audio codec for PC systems which is fully PC99 pliant and performs the analog intensive functions of the AC '97 Rev 2.1 architecture. Using 18-bit Sigma-Delta ADCs and DACs, the LM4550B provides 90 dB of Dynamic Range. The LM4550B was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system.
LM4550B Key Features
- 1 AC '97 Rev 2.1 pliant
- High Quality Sample Rate Conversion From 4 kHz
- Unique TI Chaining Function Shares a Single Controller SDATA_IN Pin Among Multiple Codecs
- Stereo Headphone Amp With Separate Gain Control
- TI's 3D Sound Stereo Enhancement Circuitry
- Advanced Power Management Support
- External Amplifier Power-Down (EAPD) Control
- PC Beep Passthrough to Line Out During Initialization or Cold Reset
- Digital 3.3-V and 5-V Supply Options
- Extended Temperature: -40°C ≤ TA ≤ 85°C
LM4550B 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
- General Audio Frequency Systems Requiring 2, 4 or 6 DAC Channels and/or up to 8 ADC Channels
