Texas Instruments LM4549B
The LM4549B device is an audio codec for PC systems which is fully compliant with the PC99 and performs the analog intensive functions of the AC '97 Rev 2.1 architecture. The LM4549B 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 ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs.| Part No. | LM4549B |
|---|---|
| Datasheet | LM4549B Download |
| Manufacturer |  Texas Instruments |
| Description | Multi-Channel Audio Codec |
| Buy | Stock & Price |
FEATURES
●1 Compliant With AC '97 Rev 2.1● High-Quality Sample Rate Conversion from 4 kHz to 48 kHz in 1-Hz Increments
● Multiple Codec Support
● True Line Level Output with Separate Gain Control
● Texas Instrument'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
● Key Specifications – Analog Mixer Dynamic Range: 97 dB (Typical) – DAC Dynamic Range: 89 dB (Typical) – ADC Dynamic Range: 90 dB (Typical) 2
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 and Multichannel Audio Frequency Systems
● Automotive Telematics 3
DESCRIPTION
Using 18-bit sigma-delta ADCs and DACs, the LM4549B provides 90 dB of dynamic range.
