GENERAL DESCRIPTION
The AD1928 is a high performance, single-chip codec that provides two analog-to-digital converters (ADCs) with differ ential input and eight digital-to-analog converters (DACs) with single-ended output using the Analog Devices, Inc., patented multibit sigma-delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to adjust volume and many other parameters. The AD1928 operates from 3.3 V digital and analog supplies. The AD1928 is available in a 48-lead (single-ended output) LQFP package. Other members of this family include a differential DAC output and I2C® control port versions.

FEATURES
    PLL-generated or direct master clock
    Low EMI design
    108 dB DAC/107 dB ADC dynamic range and SNR
    −94 dB THD + N
    3.3 V single supply
    Tolerance for 5 V logic inputs
    Supports 24 bits and 8 kHz to 192 kHz sample rates
    Differential ADC input
    Single-ended DAC output
    Log volume control with autoramp function
    SPI® controllable for flexibility
    Software-controllable clickless mute
    Software power-down
    Right-justified, left-justified, I2S-justified, and TDM modes
    Master and slave modes up to 16-channel input/output
    48-lead LQFP

APPLICATIONS
    Automotive audio systems
    Home theater systems
    Set-top boxes
    Digital audio effects processors