ADI AD1940YSTZRL

The AD1940/AD1941 are a complete 28-bit, single-chip, multichannel audio SigmaD SPrat 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. The signal processing used in the AD1940/AD1941 is comparable to that found in high end studio equipment. Most of the processing is done in full, 56-bit double-precision mode, resulting in very good, low level signal performance and the absence of limit cycles or idle tones. The dynamics processor uses a sophisticated, multiple-breakpoint algorithm often found in high end broadcast compressors.

• 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

• 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 (motor coaches)