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PRODUCT OVERVIEW

The AD1819B SoundPort Codec is designed to meet all requirements of the Audio Codec ’97, Component Specification, Revision 1.03, ? 1996, Intel Corporation, found at www.Intel.com. In addition, the AD1819B supports multiple codec configurations (up to three per AC-Link), a DSP serial mode, variable sample rates, modem sample rates and filtering, and built-in Phat Stereo 3D enhancement.

The AD1819B is an analog front end for high performance PC audio, modem, or DSP applications. The AC’97 architecture defines a 2-chip audio solution comprising a digital audio controller, plus a high quality analog component that includes Digital-to-Analog Converters (DACs), Analog-to-Digital Converters (ADCs) mixer and I/O.

The main architectural features of the AD1819B are the high quality analog mixer section, two channels of Σ? ADC conversion, two channels of Σ? DAC conversion and Data Direct Scrambling (D2S) rate generators. The AD1819B’s left channel ADC and DAC are compatible for modem applications supporting irrational sample rates and modem filtering requirements.

AC’97 FEATURES

Fully Compliant AC’97 Analog I/O Component

48-Terminal LQFP Package

Multibit SD Converter Architecture for Improved S/N Ratio >90 dB

16-Bit Stereo Full-Duplex Codec

Four Analog Line-Level Stereo Inputs for Connection from LINE, CD, VIDEO, and AUX

Two Analog Line-Level Mono Inputs for Speakerphone and PC BEEP

Mono MIC Input Switchable from Two External Sources

High Quality CD Input with Ground Sense

Stereo Line Level Output

Mono Output for Speakerphone

Power Management Support

ENHANCED FEATURES

Support for Multiple Codec Communications

DSP 16-Bit Serial Port Format

Variable 7 kHz to 48 kHz Sampling Rate with 1 Hz Resolution

Supports Modem Sample Rates and Filtering

Phat? Stereo 3D Stereo Enhancement

VHDL and Verilog Models of Serial Port Available