LM4543 Datasheet PDF | National Semiconductor

National Semiconductor LM4543

The LM4543 is an audio codec for PC systems which performs the analog-intensive function of the Analog Codec ’97 Rev 1.03 architecture. The LM4543 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 A/D’s and D/A’s and an analog mixer with 4 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute control.

Part No.	LM4543
Datasheet	LM4543 Download
Manufacturer	National Semiconductor
Description	AC97 Codec
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GENERAL DESCRIPTION

Using 18-Bit Σ∆ A/D and D/A converters, the LM4543 provides 90dB of dynamic range. In addition, the LM4543 provides National’s 3D Sound stereo enhancement technology. The LM4543 features AC-Link, a synchronous, fixed rate serial bus for connection to the digital AC ’97 Controller. The separation of the analog and digital functions of the AC ’97 architecture allows for system design flexibility and increased overall performance. Key Specifications n Analog Mixer Dynamic Range n D/A Dynamic Range n A/D Dynamic Range 95dB (typ) 89dB (typ) 90dB (typ)

FEATURES

n Audio Codec ’97 compliant n Stereo 18-Bit Σ∆ A/D’s and D/A’s with 128X oversampling n National’s 3D Sound circuitry n Power management support n Digital Interface 3V and 5V compliant

APPLICATIONS

ABSOLUTE MAXIMUM RATINGS

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