GENERAL DESCRIPTION

The AD1974 is a high performance, single-chip ADC that provides four analog-to-digital converters (ADCs) with differential inputs using the Analog Devices, Inc. patented multibit sigma-delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to enable mutes and adjust many other parameters. The AD1974 operates from 3.3 V digital and analog supplies. The AD1974 is available in a single-ended output 48-lead LQFP.

FEATURES

Phase-locked loop generated or direct master clock

Low EMI design

107 dB 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

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

Available in a 48-lead LQFP

Qualified for automotive applications

APPLICATIONS

Automotive audio systems

Home Theater Systems

Set-top boxes

Digital audio effects processors