ADI AD1939YSTZRL

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 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 3.3V digital and analog supplies. The AD1939 is available in a 64-lead (differential output) LQFP package. The AD1939 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the master clock from the LR clock or from an external crystal, the AD1939 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The DACs and ADCs are designed using the latest continuous time architectures to further minimize EMI. By using 3.3V supplies, power consumption is minimized, further reducing emissions.

• 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 clackless 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

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