Update: 01 October, 2023
The product is an audio codec that can provide 18-bit Sigma-Delta ADCs and DACs, providing 90dB of dynamic range. The product is designed specifically for PC audio systems, with full duplex stereo ADCs and DACs and analog mixers that can access 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 product also supports National’s 3D Sound stereo enhancement and a comprehensive sample rate conversion capability. The ADCs and DACs’ sample rates can be programmed separately with a resolution of 1Hz to convert any rate in the range 4kHz-48kHz. ADCs’ sample timing and DACs’ sample request timing are completely deterministic to ease task scheduling and application software development. These features and the extended temperature range also make the LM4550B suitable for non-PC codec applications. The product has the ability to connect multiple codecs together in a system to provide up to 6 equivalent stereo audio channels.
File format: PDF
Size: -
MD5 Checksum: A358AAA7CDCB28FD22F1B1EBBF496A32
Publication date: 08 May, 2012
Downloads: -
PDF Link: NATIONAL SEMICONDUCTOR -LM4550B AC 97 Rev 2.1 Multi-Channel Audio Codec with Stereo handbook PDF