Analog Devices Inc. ADSP-21489KSWZ-3B

Overview

ADSP-21489KSWZ-3B 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-programmed ROM. It integrates eight serial ports (SPORTs), S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), digital applications interface (DAI), and precision clock generators (PCGs). It serves as the core signal processor in professional audio mixing consoles and broadcast-grade digital audio workstations.

For engineers reviewing the ADSP-21489KSWZ-3B datasheet, ADSP-21489KSWZ-3B pinout, ADSP-21489KSWZ-3B application, or ADSP-21489KSWZ-3B equivalent, this page delivers verified technical context, validated pin functions, confirmed memory architecture, real-world audio system integration details, and authoritative alternative part guidance - all grounded in Analog Devices' Rev. I datasheet and official ordering guide.

Technical Context

The ADSP-21489KSWZ-3B implements a dual-processing-element SIMD core (PEx and PEy), enabling parallel execution of identical instructions on independent data streams - critical for real-time FIR/IIR filtering and FFT-based spectral analysis. Its Super Harvard architecture supports simultaneous 64-bit PM and DM bus transfers plus instruction cache fetches, sustaining 2.7 GFLOPS at 450 MHz.

It features two independent clock domains: a 450 MHz core domain hosting computational units, timers, and on-chip memory; and a peripheral domain managing DAI, DPI, S/PDIF, ASRCs, and SPORTs via dedicated 32-bit IOD0/IOD1 buses. The DAI includes four PCGs, IDP/PDAP, and flexible signal routing (SRU) for deterministic low-latency audio interconnect.

Key Specifications

Pinout & Package

The ADSP-21489KSWZ-3B is housed in a 176-lead LQFP_EP package (16 × 16 mm body, 0.5 mm lead pitch) with exposed thermal pad. This package supports full peripheral access including external port (SDRAM/AMI), all 8 SPORTs, DAI pins, S/PDIF, ASRCs, and JTAG debug interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21489KSWZ-3B, the ADSP-21487KSWZ-3A trades ROM-based security and decoder integration for RAM flexibility, while the ADSP-21486KSWZ-3A sacrifices frequency headroom and external memory capability for smaller footprint and lower cost - making the ADSP-21489KSWZ-3B optimal for premium audio systems requiring full feature set and automotive qualification.

Availability

ADSP-21489KSWZ-3B is available at Aetrix Electronics and suitable for professional audio mixing consoles, broadcast digital audio workstations, automotive infotainment head units, and high-end home theater AV receivers requiring stable component supply across long production lifecycles.

Supply support for ADSP-21489KSWZ-3B 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 leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Wilmington, MA, with deep expertise in precision signal processing for audio, industrial, and automotive markets.

The ADSP-21489KSWZ-3B belongs to the SHARC® family of SIMD floating-point DSPs, designed specifically for computationally intensive, low-latency audio applications demanding deterministic real-time performance and integrated audio-centric peripherals.

FAQ

What is the maximum operating frequency of the ADSP-21489KSWZ-3B?

The ADSP-21489KSWZ-3B operates at a maximum frequency of 450 MHz, as confirmed in Table 2 of the Rev. I datasheet. This enables benchmark performance of 20.44 μs for a 1024-point complex FFT and 1.1 ns per FIR tap - critical for real-time multi-channel audio processing. The device achieves this speed using a 1.1 V core supply and requires strict power integrity design per Analog Devices' AN-1183 application note.

Does the ADSP-21489KSWZ-3B include factory-programmed audio codecs in ROM?

Yes, the ADSP-21489KSWZ-3B includes 4 Mbits of mask-programmed ROM containing certified multichannel audio decoding and post-processing algorithms from Dolby® Labs and DTS®, as stated in Table 2 footnote 2 and General Description section. This eliminates the need for external flash storage and simplifies qualification for broadcast and professional audio equipment.

Which package type does the ADSP-21489KSWZ-3B use, and does it support the external port interface?

The ADSP-21489KSWZ-3B uses the 176-lead LQFP_EP package, which fully supports the external port interface including SDRAM and AMI controllers, as specified in Table 2 and confirmed in the "176-Lead LQFP_EP Lead Assignment" section (Page 63). This enables glueless connection to standard DDR2/DDR3 memory - a capability absent in 88-lead and 100-lead variants.

Is the ADSP-21489KSWZ-3B qualified for automotive applications?

Yes, the ADSP-21489KSWZ-3B is AEC-Q100 qualified for automotive applications, as explicitly stated in the FEATURES section and Automotive Products chapter (Page 69) of the Rev. I datasheet. This qualification covers temperature cycling, humidity, mechanical shock, and ESD robustness - making it suitable for infotainment head units and digital cockpit audio systems.

How does the Digital Applications Interface (DAI) enhance audio system design with the ADSP-21489KSWZ-3B?

The DAI in the ADSP-21489KSWZ-3B includes four precision clock generators (PCGs), S/PDIF transceiver, input data port (IDP/PDAP), and a flexible signal routing unit (SRU). It enables hardware-level routing of audio clocks and data between peripherals - for example, synchronizing eight SPORTs to independent sample rates or feeding ASRC outputs directly to DACs - without CPU involvement, reducing latency and freeing core cycles for algorithm execution.