AD21489WBCPZ402

Overview

The AD21489WBCPZ402 is a high-performance digital signal processor from Analog Devices, belonging to the fourth-generation SHARC family. It features a single-instruction, multiple-data (SIMD) core with a maximum instruction rate of 450 MHz, delivering up to 2700 MFLOPS. The device integrates 5 Mbits of on-chip RAM and 4 Mbits of mask-programmable ROM. It supports IEEE 32-bit and 40-bit floating-point arithmetic alongside 32-bit fixed-point formats. Key peripherals include eight serial ports, four asynchronous sample rate converters, an S/PDIF transceiver, and hardware accelerators for FIR, IIR, and FFT operations. The component is housed in an 88-lead LFCSP package.

Feature Summary

• 450 MHz SIMD Core: Delivers 2700 MFLOPS using dual processing elements (PEX/PEY) supporting 32/40-bit floating-point and 32-bit fixed-point data formats.
• On-Chip Memory: Includes 5 Mbits of SRAM and 4 Mbits of ROM, configurable for various word sizes including efficient 16-bit floating-point storage.
• Audio Peripherals: Features eight SPORTs, four ASRCs, an S/PDIF transceiver, and a flexible Signal Routing Unit (SRU) for complex audio routing.
• Hardware Acceleration: Integrates dedicated FIR, IIR, and FFT accelerators to offload computational tasks from the main core.

Applications

• High-performance automotive audio processing and surround sound decoding
• Industrial control systems requiring precise timing and real-time DSP
• Medical imaging and ultrasound signal processing
• Professional audio equipment and speech recognition systems

Procurement Notes

Verify the specific suffix '402' against the official Analog Devices ordering guide to confirm temperature grade and packaging details. Ensure compatibility with CrossCore Embedded Studio (CCES) or VisualDSP++ development environments for code compilation and debugging. Confirm that the 88-lead LFCSP package constraints are met in the PCB layout design.

Selection Notes

Select the AD21489 variant when 450 MHz performance and 5 Mbits of RAM are required. Compare with ADSP-21483 or ADSP-21486 if lower clock speeds or different memory configurations suffice. Note that the 88-lead LFCSP package does not support the external port interface; use the 176-lead LQFP if external SDRAM/AMI connectivity is necessary.

Part Context

This part belongs to the ADSP-2148x family, which includes ADSP-21483, ADSP-21486, ADSP-21487, and ADSP-21488. All members share source code compatibility with previous SHARC generations (ADSP-2126x, ADSP-2136x, etc.) and offer pin-compatible options across different packages to facilitate design upgrades.

Replacement Considerations

Direct pin-compatible replacements within the same package include other ADSP-2148x variants such as ADSP-21486 or ADSP-21487, provided their memory and clock specifications meet the application requirements. Verify software compatibility as all family members maintain code compatibility.