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)
|