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