GENERAL DESCRIPTION

The AD1940/AD1941 are a complete 28-bit, single-chip, multichannel audio SigmaDSP™ for equalization, multiband dynamic processing, delay compensation, speaker compensation, and image enhancement. These algorithms can be used to compensate for the real world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

FEATURES

16-channel digital audio processor

Accepts sample rates up to 192 kHz

28-bit × 28-bit multiplier with full 56-bit accumulator

Fully programmable program RAM for custom

program download

Parameter RAM allows complete control of 1,024 parameters

Control port features safeload for transparent parameter

updates and complete mode and memory transfer control

Target/slew RAM for click-free volume control and dynamic

parameter updates

Double precision mode for full 56-bit processing

PLL for generating MCLK from 64 × fS, 256 × fS, 384 × fS, or

512 × fS clocks

Hardware-accelerated DSP core

21 kB (6,144 words) data memory for up to 128 ms of audio

delay at fs = 48 kHz

Flexible serial data port with I2S-compatible, left-justified,

and right-justified serial port modes

8- and 16-channel TDM input/output modes

On-chip voltage regulator for compatibility with 3.3 V and

5 V systems

Programmable low power mode

Fast start-up and boot time from power-on or reset

48-lead LQFP plastic package

APPLICATIONS

Automotive sound systems

Digital televisions

Home theater systems (Dolby digital/DTS postprocessor)

Multichannel audio systems

Mini-component stereos

Multimedia audio

Digital speaker crossover

Musical instruments

In-seat sound systems (aircrafts/motor coaches)