Analog Devices Inc. ADSP-21479KSWZ-1A

Overview

ADSP-21479KSWZ-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 5 Mbits of on-chip SRAM and 4 Mbits of ROM, supporting SIMD computation, S/PDIF transceiver, and asynchronous sample rate converters in professional audio systems.

For engineers reviewing the ADSP-21479KSWZ-1A datasheet, ADSP-21479KSWZ-1A pinout, ADSP-21479KSWZ-1A application, or ADSP-21479KSWZ-1A equivalent, key selection considerations include its 196-ball CSP_BGA package, automotive AEC-Q100 qualification, real-time clock (RTC) support, watchdog timer, and SDRAM controller - all confirmed for this specific variant.

Technical Context

The ADSP-21479KSWZ-1A implements a dual-processing-element SIMD core (PEx/PEy), each with ALU, multiplier, shifter, and 16×40-bit register file, enabling 1.8 GFLOPS at 300 MHz. Its enhanced Harvard architecture supports simultaneous 64-bit PM/DM bus transfers and instruction cache-assisted three-bus operation.

It integrates two clock domains: core domain (300 MHz) hosting FFT/FIR/IIR accelerators and JTAG debug, and I/O processor domain (PCLK) managing DAI peripherals including four PCGs, eight SPORTs, S/PDIF Tx/Rx, four ASRCs, and IDP/PDAP - all mapped to the 196-ball CSP_BGA package.

Key Specifications

Pinout & Package

ADSP-21479KSWZ-1A is housed in a 196-ball CSP_BGA package (ball pitch: 0.65 mm, body size: 12 mm × 12 mm), supporting full peripheral functionality including SDRAM interface, RTC, watchdog timer, and shift register - features unavailable in 88-LFCSP_VQ or 100-LQFP variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21479KSWZ-1A, the ADSP-21478KSWZ-3 sacrifices 50% peak compute and memory capacity for lower cost and smaller footprint, while the ADSP-21479KSWZ-2 retains full processing capability but omits automotive-specific functions and temperature grading - making ADSP-21479KSWZ-1A the sole option for AEC-Q100-compliant, RTC-enabled designs.

Availability

ADSP-21479KSWZ-1A is available at Aetrix Electronics and suitable for professional audio mixing consoles, automotive infotainment head units, and studio-grade audio interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.

Supply support for ADSP-21479KSWZ-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 deep expertise in precision signal processing and power management ICs.

The ADSP-21479KSWZ-1A belongs to the SHARC® family of SIMD floating-point DSPs, designed specifically for computationally intensive, low-latency audio and industrial signal processing applications demanding deterministic real-time performance.

FAQ

What is the maximum operating frequency of the ADSP-21479KSWZ-1A?

The ADSP-21479KSWZ-1A operates at up to 300 MHz, delivering 1.8 GFLOPS in SIMD mode. This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) and enables benchmark performance such as a 1024-point complex FFT in 30.59 μs. The 300 MHz rating applies specifically to the ADSP-21479KSWZ-1A variant in its 196-ball CSP_BGA package.

Does the ADSP-21479KSWZ-1A support SDRAM interfacing?

Yes, the ADSP-21479KSWZ-1A includes a glueless SDRAM controller accessible only in the 196-ball CSP_BGA package. It supports up to four banks with capacities of 62M words (Bank 0) and 64M words (Banks 1–3), using a 64-bit EPD bus that enables SIMD data access. This feature is absent in 88-LFCSP_VQ and 100-LQFP variants of the ADSP-2147x family.

Is the ADSP-21479KSWZ-1A qualified for automotive applications?

Yes, the ADSP-21479KSWZ-1A is AEC-Q100 qualified (Grade 3, –40°C to +85°C) and includes automotive-specific peripherals: real-time clock (RTC), watchdog timer, and thermal diode. These features are validated for use in infotainment head units and ADAS audio subsystems, distinguishing it from commercial-grade variants like ADSP-21479KSWZ-2.

What audio-specific peripherals are integrated into the ADSP-21479KSWZ-1A?

The ADSP-21479KSWZ-1A integrates a comprehensive digital audio interface: S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), eight serial ports (SPORTs), four precision clock generators (PCGs), and an input data port (IDP/PDAP). These are routed through the Digital Applications Interface (DAI) and are fully functional in the 196-ball CSP_BGA package.

How does the VISA instruction set benefit firmware development for the ADSP-21479KSWZ-1A?

VISA reduces code size by up to 40% through 16-bit and 32-bit compressed instructions, lowering memory footprint and improving cache efficiency. It is supported for execution from SDRAM only - not AMI - and requires compilation with VISA-enabled toolchains. This optimization directly benefits large audio decoder firmware (e.g., Dolby/DTS) stored in the device's 4 Mbits factory-programmed ROM.