AD1941YSTZ-29-RL

Overview

The AD1941YSTZ-29-RL is a multichannel audio SigmaDSP processor from Analog Devices, housed in a 48-lead LQFP package. It features a 28-bit DSP core with 56-bit double-precision arithmetic and accepts sample rates up to 192 kHz. The device includes 21 kB of data memory for audio delay and supports flexible serial interfaces including I2S, left/right-justified, and TDM modes. Controlled via a 2-wire I2C bus, it integrates an on-chip voltage regulator compatible with 3.3 V or 5 V systems and operates within a temperature range of -40°C to +105°C.

Feature Summary

• 16-channel digital audio processing with 28-bit × 28-bit multipliers
• Flexible serial data ports supporting I2S, left/right-justified, and 8/16-channel TDM
• On-chip voltage regulator for 3.3 V and 5 V system compatibility
• I2C control interface with safeload for transparent parameter updates

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 '-29-RL' against the manufacturer's current datasheet to confirm tape-and-reel packaging quantities and any minor revision differences. Ensure the I2C control interface requirement aligns with the host controller capabilities, as this variant differs from the SPI-controlled AD1940.

Selection Notes

Select the AD1941 over the AD1940 when an I2C control interface is required instead of SPI. Both devices share identical signal processing capabilities, pinouts, and power specifications. Confirm that the application requires the 16-channel input/output capacity and the specific clocking requirements supported by the internal PLL.

Part Context

This component belongs to the AD1940/AD1941 family of SigmaDSP processors. The AD1941 is functionally identical to the AD1940 but utilizes a 2-wire I2C bus for control, whereas the AD1940 uses a 4-wire SPI port. They are designed for high-performance multichannel audio processing in consumer and automotive electronics.

Replacement Considerations

The AD1940YSTZ-29-RL is a direct functional substitute if the PCB design accommodates the SPI interface or if the software driver is updated to support SPI communication. Verify pin compatibility and control protocol differences before substitution.