Analog Devices Inc. AD21489WBSWZ402

Overview

AD21489WBSWZ402 from Analog Devices is a 32-bit/40-bit floating-point SHARC® DSP optimized for high-performance audio processing, operating at up to 450 MHz with 5 Mbits on-chip SRAM and 4 Mbits mask-ROM. It integrates eight serial ports (SPORT), S/PDIF transceiver, four asynchronous sample rate converters (ASRC), digital applications interface (DAI), and precision clock generators (PCG) - deployed in professional audio mixing consoles and automotive infotainment head units.

For engineers reviewing the AD21489WBSWZ402 datasheet, AD21489WBSWZ402 pinout, AD21489WBSWZ402 application, or AD21489WBSWZ402 equivalent, this page delivers verified core architecture details, validated peripheral mappings, confirmed AEC-Q100 qualification status, and precise memory bandwidth allocation across its four internal SRAM blocks - all specific to the 88-lead LFCSP_VQ package variant.

Technical Context

The AD21489WBSWZ402 implements a dual-processing-element SIMD core (PEx/PEy), enabling parallel execution of identical instructions on independent data streams - delivering 2.7 GFLOPS at 450 MHz. Its enhanced Harvard architecture supports simultaneous 64-bit PM/DM bus transfers and includes an instruction cache that selectively caches conflicting fetches to sustain looped FFT and FIR operations.

Peripherally, it features a dedicated I/O processor domain with DAI routing, S/PDIF Tx/Rx, four ASRCs, and PCG units - all accessible via signal routing units (SRU) - while excluding external port (SDRAM/AMI) support due to its 88-lead LFCSP_VQ package constraint per datasheet Table 2 and Pin Function Descriptions.

Key Specifications

Pinout & Package

AD21489WBSWZ402 is housed in an 88-lead LFCSP_VQ (Lead Frame Chip Scale Package, Very Thin Quad Flat No-Lead) with exposed thermal pad, 12 mm × 12 mm body, 0.5 mm lead pitch, and RoHS-compliant matte tin finish. This package omits external port pins (SDRAM/AMI), confirming absence of SDRAM controller functionality per datasheet Table 2 and Pin Function Descriptions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance audio DSP applications.

Compared with AD21489WBSWZ402, AD21486WBSWZ402 trades ROM-based audio decoders for identical package and lower clock speed, while AD21489WBSWZ4A2 retains full feature parity but adds SDRAM support at the cost of larger footprint and higher power - making AD21489WBSWZ402 optimal for space-constrained, ROM-dependent automotive and pro-audio modules.

Availability

AD21489WBSWZ402 is available at Aetrix Electronics and suitable for professional audio mixing consoles, automotive infotainment head units, studio DAW interfaces, and high-end home theater AV receivers requiring stable component supply and AEC-Q100 compliance.

Supply support for AD21489WBSWZ402 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications infrastructure.

The AD21489WBSWZ402 belongs to the SHARC® family of SIMD DSPs designed specifically for computationally intensive, low-latency audio signal processing - emphasizing on-chip memory bandwidth, audio-optimized peripherals, and automotive-grade reliability.

FAQ

What is the maximum operating frequency of the AD21489WBSWZ402?

The AD21489WBSWZ402 operates at a maximum frequency of 450 MHz, enabling benchmark performance of 20.44 μs for a 1024-point complex FFT and 1.1 ns per FIR tap. This frequency is guaranteed across the full AEC-Q100 Grade 2 temperature range (–40°C to +105°C ambient) and is tied to the 88-lead LFCSP_VQ package's thermal characteristics as specified in the Rev. I datasheet.

Does the AD21489WBSWZ402 include on-chip ROM, and what is stored in it?

Yes, the AD21489WBSWZ402 includes 4 Mbits of mask-programmed ROM containing factory-loaded multichannel audio decoding and post-processing algorithms from Dolby® Labs and DTS®, as confirmed in datasheet Table 2 and General Description. The exact decoder combination (e.g., Dolby TrueHD, DTS-HD MA) varies by chip version and is documented in Analog Devices' online support resources.

Is the AD21489WBSWZ402 pin-compatible with other ADSP-2148x family members?

No - the AD21489WBSWZ402 uses an 88-lead LFCSP_VQ package, while other ADSP-2148x variants use 100-lead or 176-lead LQFP_EP packages. Pin count, pitch, thermal pad layout, and signal assignment differ significantly; therefore, PCB redesign is required when substituting across package types, even within the same family.

What audio-specific peripherals are integrated into the AD21489WBSWZ402?

The AD21489WBSWZ402 integrates eight serial ports (SPORT), an S/PDIF transceiver, four asynchronous sample rate converters (ASRCs) with –128 dB performance, four precision clock generators (PCG), and a digital applications interface (DAI) with signal routing unit (SRU) - all explicitly listed in datasheet Table 2 and Figure 1 for the ADSP-21489 variant.

How does the ROM-based security feature work on the AD21489WBSWZ402?

The AD21489WBSWZ402 implements ROM-based security by preventing external boot and disabling unrestricted JTAG access unless a unique 64-bit customer key is scanned via the JTAG TDI pin. When enabled, the processor executes exclusively from internal ROM and ignores invalid keys, as detailed in the "ROM Based Security" section of the Rev. I datasheet.