Analog Devices Inc. ADSP-21488KSWZ-3B

Overview

ADSP-21488KSWZ-3B from Analog Devices is a 32-bit/40-bit floating-point SHARC® DSP optimized for high-performance audio processing, operating at up to 400 MHz with 3 Mbits of on-chip SRAM and 4 Mbits of mask-programmable 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 targets automotive-grade audio systems requiring deterministic real-time signal processing.

For engineers reviewing the ADSP-21488KSWZ-3B datasheet, ADSP-21488KSWZ-3B pinout, ADSP-21488KSWZ-3B application, or ADSP-21488KSWZ-3B equivalent, this page delivers verified technical context, validated pin mapping for the 88-lead LFCSP_VQ package, confirmed automotive qualification (AEC-Q100), and precise functional alternatives - all grounded in Analog Devices' Rev. I documentation and official ordering guide.

Technical Context

The ADSP-21488KSWZ-3B implements a dual-processing-element SIMD core (PEx and PEy), enabling parallel execution of identical instructions on independent data streams - critical for FIR/IIR filtering and FFT acceleration. Its memory architecture features separate 64-bit PM and DM buses supporting simultaneous instruction fetch and dual 64-bit data transfers per cycle.

Peripherals are partitioned into two clock domains: the core domain (CCLK) hosts the SIMD engine, instruction cache, and on-chip RAM/ROM; the I/O processor domain (PCLK) manages DAI, DPI, S/PDIF, ASRCs, SPORTs, and PWM units via dedicated 32-bit IOD0/IOD1 buses. The device lacks an external port (SDRAM/AMI) in its 88-lead LFCSP_VQ package, as confirmed in Table 2 and Pin Function Descriptions.

Key Specifications

Pinout & Package

ADSP-21488KSWZ-3B is housed in an 88-lead LFCSP_VQ (Lead Frame Chip Scale Package, Very Thin Quad Flat No-Lead) with exposed thermal pad, measuring 12 mm × 12 mm × 0.8 mm. This package omits external port pins (SDRAM/AMI), consistent with Table 2 and the "88-Lead LFCSP_VQ Lead Assignment" section (Page 59).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21488KSWZ-3B, the ADSP-21489KSWZ-3A delivers 12.5% higher peak performance and double the SRAM for larger coefficient sets, while the ADSP-21486KSWZ-3A trades ROM-based decoders for extra SRAM - making it ideal for proprietary audio algorithms where decoder licensing is avoided.

Availability

ADSP-21488KSWZ-3B is available at Aetrix Electronics and suitable for automotive infotainment systems, professional audio equipment, and medical ultrasound platforms requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.

Supply support for ADSP-21488KSWZ-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 design centers worldwide and a 50+ year heritage in precision signal processing.

The ADSP-21488KSWZ-3B belongs to the SHARC® family - engineered specifically for deterministic, low-latency audio and industrial signal processing, combining floating-point precision with hardware-accelerated peripherals to replace multi-chip solutions in space-constrained systems.

FAQ

What is the maximum operating frequency of the ADSP-21488KSWZ-3B?

The ADSP-21488KSWZ-3B operates at a maximum frequency of 400 MHz, as specified in Table 2 of the Rev. I datasheet. This clock speed enables 2.4 GFLOPS peak performance in SIMD mode and supports real-time execution of demanding audio algorithms such as 1024-point FFTs in 23 μs. The device achieves this frequency with 1.1 V core supply and proper thermal management via its LFCSP_VQ package's exposed thermal pad.

Does the ADSP-21488KSWZ-3B include an external memory interface like SDRAM or AMI?

No, the ADSP-21488KSWZ-3B in the 88-lead LFCSP_VQ package does not include an external port interface (SDRAM or AMI), as explicitly stated in Table 2 and confirmed in the "Pin Function Descriptions" section. Unlike 176-lead or 100-lead variants, this variant relies solely on its 3 Mbits of on-chip SRAM and 4 Mbits of ROM - simplifying layout and reducing BOM count for compact audio modules.

Is the ADSP-21488KSWZ-3B qualified for automotive applications?

Yes, the ADSP-21488KSWZ-3B is AEC-Q100 qualified for automotive applications (Grade 2: −40°C to +105°C ambient), as documented in the "Automotive Products" section (Page 69) and Table 2. This qualification covers thermal cycling, humidity testing, and ESD robustness - making it suitable for infotainment head units, digital cockpit processors, and active noise cancellation subsystems.

What audio-specific peripherals are integrated into the ADSP-21488KSWZ-3B?

The ADSP-21488KSWZ-3B integrates eight serial ports (SPORTs), an S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), a digital applications interface (DAI) with four precision clock generators (PCGs), and an input data port (IDP/PDAP). These peripherals enable direct connection to ADCs, DACs, digital amplifiers, and other audio ICs without external clock buffers or level shifters - confirmed in the "Features" and "Family Peripheral Architecture" sections.

How does the ROM-based security feature work on the ADSP-21488KSWZ-3B?

The ADSP-21488KSWZ-3B implements ROM-based security by preventing unauthorized JTAG access and enforcing boot-from-ROM execution unless a unique 64-bit key is scanned via the JTAG port. When enabled, the processor ignores external code loads and restricts emulation until the correct key is authenticated - a hardware-enforced mechanism detailed in the "ROM Based Security" subsection (Page 7) for protecting proprietary audio firmware.