LM4549B Datasheet (National Semiconductor) - AC 97 Rev 2.1 Multi-Channel Audio Codec

LM4549B, AC 97 Rev 2.1 Multi-Channel Audio Codec

The LM4549B is an audio codec for PC systems which is fully PC99 compliant 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 qual

LM4549B Features

* full duplex stereo ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs. Each mixer input has separate gain, attenuation and mute control and the mixers drive 1 mono and 2 stereo outputs, each with attenuation and mute control. The LM4549B supports National’s 3D Sound stereo enh