AD21478WYSWZ2A02

Overview

The AD21478WYSWZ2A02 is an automotive-grade SHARC digital signal processor from Analog Devices, operating at a maximum frequency of 300 MHz. It features a 32-bit/40-bit floating-point SIMD architecture with 3 Mbits of on-chip RAM and 4 Mbits of factory-programmed ROM containing Dolby and DTS audio decoders. The device utilizes a Super Harvard Architecture for high throughput and includes extensive audio-centric peripherals such as S/PDIF transceivers, asynchronous sample rate converters, and precision clock generators. It is housed in a 100-lead LQFP package with exposed pad.

Feature Summary

• 300 MHz operation with 3 Mbits SRAM and 4 Mbits ROM
• SIMD computational engine delivering up to 1.8 GFLOPS
• Factory programmed with Dolby and DTS audio decoders
• AEC-Q100 qualified for automotive applications

Applications

• High-performance audio processing systems
• Automotive infotainment and control units
• Digital signal processing requiring real-time floating-point computation

Procurement Notes

Verify the specific suffix '2A02' against the manufacturer's current ordering guide to confirm availability and exact memory configuration. Check for RoHS compliance status and moisture sensitivity level (MSL) ratings prior to assembly planning. Confirm that the 100-LQFP-EP package dimensions match the target PCB footprint requirements.

Selection Notes

Select this model over the ADSP-21477 or ADSP-21479 based on the required balance of 3 Mbits RAM and 4 Mbits ROM. Ensure the design supports the 100-lead LQFP package constraints, noting that external port interfaces are not available in this package type. Verify that the 300 MHz clock speed meets the system timing requirements for the intended DSP algorithms.

Part Context

This component belongs to the ADSP-2147x family of SHARC processors, which are source code compatible with previous generations like the ADSP-2136x and ADSP-2146x. The ADSP-21478 specifically bridges the gap between the lower-memory ADSP-21477 and the higher-memory ADSP-21479, offering a mid-range solution for complex audio tasks.

Replacement Considerations

Direct replacements within the same package include the ADSP-21477 (lower memory) and ADSP-21479 (higher memory). Cross-family compatibility exists with ADSP-2136x and ADSP-2146x series in SISD mode, though performance characteristics will differ.