LM4546B
Description
The LM4546B 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 LM4546B provides 90 d B of Dynamic Range. The LM4546B 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 2 stereo and 2 mono inputs. Each mixer input has separate gain, attenuation and mute control and the mixers drive 1 mono and 1 stereo output, each with attenuation and mute control. The LM4546B supports National’s 3D Sound stereo enhancement and a prehensive sample rate conversion capability. The sample rate for the ADCs and DACs can be programmed separately with a resolution of 1 Hz to convert any rate in the range 4 k Hz
- 48 k Hz. Sample timing from the ADCs and sample request timing for the DACs are pletely deterministic to ease...
