LM4546B

LM4546B www.ti.com SNOSAI4F – JUNE 2005 – REVISED MAY 2013 LM4546B AC '97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and Texas Instruments 3D Sound Check for Samples: LM4546B FEATURES 1 2 AC '97 Rev 2.1 Compliant High Quality Sample Rate Conversion from 4 kHz to 48 kHz in 1 Hz Increments Multiple Codec Support Texas Instruments' 3D Sound Stereo Enhancement Circuitry Advanced Power Management Support Digital 3.3V and 5V Supply Options Extended Temperature: −40°C ≤ TA ≤ 85°C 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 Multi-channel Audio Frequency Systems Automotive Telematics KEY SPECIFICATIONS Analog Mixer Dynamic Range 97 dB (typ) DAC Dynamic Range 89 dB (typ) ADC Dynamic Range 90 dB (typ) DESCRIPTION The LM4546B 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 LM4546B provides 90 dB 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 mon...