AD1940YSTZRL

Overview

The AD1940YSTZRL is a 48-lead LQFP multichannel audio SigmaDSP processor from Analog Devices. It features a hardware-accelerated 28-bit DSP core with full 56-bit double-precision accumulation, supporting sample rates up to 192 kHz. The device includes 21 kB of data memory for audio delay and fully programmable RAM for custom algorithm downloads. It accepts serial or TDM inputs/outputs and utilizes an on-chip voltage regulator for compatibility with 3.3 V or 5 V systems while operating on a 2.5 V core supply.

Feature Summary

• 16-channel digital audio processing with 28-bit × 28-bit multiplier and 56-bit accumulator
• Flexible serial data ports supporting I2S, left-justified, right-justified, and 8/16-channel TDM modes
• On-chip voltage regulator enabling operation with 3.3 V or 5 V system supplies
• Control port with safeload feature for transparent parameter updates without output clicks

Applications

• Automotive sound systems
• Digital televisions
• Home theater systems (Dolby Digital/DTS postprocessor)
• Multichannel audio systems
• Digital speaker crossover

Procurement Notes

Verify the specific ordering suffix YSTZRL against the manufacturer's current datasheet to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead-free soldering requirements prior to procurement. Ensure the source document matches the Rev B specification sheet for accurate electrical parameters.

Selection Notes

Select the AD1940 variant if SPI control interface is required; choose the AD1941 for I2C bus compatibility. Ensure the design supports the 2.5 V core voltage while managing the ODVDD level for digital outputs. Verify that the host system can provide the necessary master clock frequencies (64× to 512× fs) for the internal PLL configuration.

Part Context

This component belongs to the AD1940/AD1941 SigmaDSP family, designed for high-performance audio signal processing. It serves as a central processing unit for complex audio algorithms including equalization, dynamics processing, and delay compensation in multi-channel environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.