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
