PRODUCT OVERVIEW

The AD1953 is a complete 26-bit, single-chip, 3-channel digital audio playback system with built-in DSP functionality for speaker equalization, dual-band compression/limiting, delay compensation, and image enhancement. These algorithms can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

FEATURES

5 V 3-Channel Audio DAC System

Digital Audio Output (2-Channel or 6-Channel Packed Mode)

Accepts Sample Rates up to 48 kHz

7 Biquad Filter Sections per Channel

Dual Dynamic Processor with Arbitrary Input/Output Curve and Adjustable Time Constants

0 ms to 6 ms Variable Delay/Channel for Speaker Alignment

Stereo Spreading Algorithm for Phat Stereo? Effect

Program RAM Allows Complete New Program Download via SPI Port

Parameter RAM Allows Complete Control of More Than 200 Parameters via SPI Port

SPI Port Features Safe-Upload Mode for Transparent Filter Updates

2 Control Registers Allow Complete Control of Modes and Memory Transfers

Differential Output for Optimum Performance

112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample Rate (A-Weighted Stereo)

70 dB Stop-Band Attenuation

On-Chip Clickless Volume Control

Hardware and Software Controllable Clickless Mute

Digital De-emphasis Processing for 32 kHz, 44.1 kHz, 48 kHz Sample Rates

Flexible Serial Data Port with Right-Justified, Left-Justified, I2S Compatible, and DSP Serial Port Modes

Auxiliary Digital Input

Graphical Custom Programming Tools

48-Lead LQFP Plastic Package

APPLICATIONS

2.0/2.1 Channel Audio Systems (2 Main Channels Plus Subwoofer)

Multichannel Automotive Sound Systems

Multimedia Audio

Mini Component Stereo

Home Theater Systems (AC-3 Postprocessor)

Musical Instruments

In-Seat Sound Systems (Aircraft, Motor Coaches)