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