GENERAL DESCRIPTION
The AD1939 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with differential input, and eight digital-to-analog converters (DACs) with differential 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 AD1939 operates from 3.3 V digital and analog supplies. The AD1939 is available in a 64-lead (differential output) LQFP package.

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

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