Analog Devices Inc. ADSP-21478KSWZ-1A

Overview

ADSP-21478KSWZ-1A from Analog Devices is a 32-bit/40-bit floating-point SHARC® DSP optimized for high-performance audio processing, operating at up to 300 MHz with 3 Mbits of on-chip SRAM and 4 Mbits of factory-programmed ROM containing Dolby/DTS audio decoders. It integrates dual SIMD computational units (PEx/PEy), eight serial ports (SPORTs), S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), and digital applications interface (DAI) with precision clock generators.

For engineers reviewing the ADSP-21478KSWZ-1A datasheet, ADSP-21478KSWZ-1A pinout, ADSP-21478KSWZ-1A application, or ADSP-21478KSWZ-1A equivalent, this page delivers verified core frequency, memory mapping, peripheral register allocation, DAI routing capability, and automotive-grade AEC-Q100 qualification - all confirmed for the exact 88-lead LFCSP_VQ package variant.

Technical Context

The ADSP-21478KSWZ-1A implements a dual-processing-element SIMD architecture with independent ALU/multiplier/shifter units per PE, enabling simultaneous execution of identical instructions on distinct data streams. Its 5-stage sequencer supports single-cycle fetch of one instruction and four operands via PM/DM buses and instruction cache.

It features two clock domains: a 300 MHz core domain with 64-bit PM/DM buses and a separate I/O processor domain supporting 32-bit IOD0/IOD1 DMA transfers. The DAI includes 20 configurable signal routing pins, four PCGs, IDP/PDAP, and S/PDIF Tx/Rx - all mapped to dedicated physical pins in the 88-LFCSP_VQ package.

Key Specifications

Pinout & Package

ADSP-21478KSWZ-1A is housed in an 88-lead LFCSP_VQ package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Analog Devices Rev. E datasheet, Pages 66–67. The package supports full DAI/DPI peripheral routing and includes dedicated S/PDIF, ASRC, and PCG pins - no external port (SDRAM/AMI) interface is available in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21478KSWZ-1A, the ADSP-21479KBCZ-3A adds SDRAM interfacing and automotive Grade 1 support but increases PCB complexity; the ADSP-21477KSWZ-2A reduces cost and power but sacrifices ROM-based codecs and ASRC functionality - making ADSP-21478KSWZ-1A the optimal balance of integration, performance, and package compactness for premium audio systems.

Availability

ADSP-21478KSWZ-1A is available at Aetrix Electronics and suitable for professional audio mixing consoles, automotive infotainment head units, and high-end home theater receivers requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for ADSP-21478KSWZ-1A 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 ISO 9001-certified manufacturing.

The SHARC® processor family - including ADSP-21478KSWZ-1A - was designed specifically for computationally intensive, low-latency audio signal processing in professional, automotive, and consumer applications demanding deterministic real-time behavior and certified codec integration.

FAQ

What is the maximum operating frequency of the ADSP-21478KSWZ-1A?

The ADSP-21478KSWZ-1A operates at up to 300 MHz, delivering 1.8 GFLOPS peak performance in SIMD mode. This frequency is guaranteed across the industrial temperature range (−40°C to +85°C) and validated under AEC-Q100 Grade 2 conditions. All timing specifications - including 1024-point FFT in 30.59 μs - are measured at this rated speed.

Does the ADSP-21478KSWZ-1A include factory-programmed audio decoders?

Yes, the ADSP-21478KSWZ-1A includes 4 Mbits of on-chip ROM preloaded with licensed Dolby Digital, DTS Coherent Acoustics, and MPEG-2 AAC decoders. These are executable directly from ROM without external flash, ensuring certified compliance and eliminating boot-time dependencies - a feature confirmed for the KSWZ-1A variant in Analog Devices' Rev. E datasheet.

Which package does the ADSP-21478KSWZ-1A use, and what peripherals are accessible?

The ADSP-21478KSWZ-1A uses an 88-lead LFCSP_VQ package (12 mm × 12 mm). It provides full access to DAI (20 pins), DPI (14 pins), 8 SPORTs, S/PDIF transceiver, 4 ASRCs, and 4 PWM units. No external port (SDRAM/AMI) is available in this package - all memory expansion must occur via parallel SPORT or SPI interfaces.

Is the ADSP-21478KSWZ-1A qualified for automotive applications?

Yes, the ADSP-21478KSWZ-1A is AEC-Q100 qualified for Grade 2 (−40°C to +105°C ambient), making it suitable for automotive infotainment head units and ADAS audio preprocessing. This qualification covers thermal cycling, vibration, and ESD robustness - explicitly confirmed for the KSWZ-1A suffix in Analog Devices' Automotive Products section (Page 73, Rev. E).

How does the VISA instruction set improve code efficiency in the ADSP-21478KSWZ-1A?

The VISA (Variable Instruction Set Architecture) in ADSP-21478KSWZ-1A supports 16-/32-/48-bit compressed opcodes, reducing average code size by up to 30% versus legacy 48-bit ISA. This lowers memory footprint and instruction fetch bandwidth - critical for ROM-constrained audio applications - while maintaining full backward compatibility with ADSP-2146x/2137x source code.