Analog Devices Inc. ADSP-21369KSWZ-4A

Overview

ADSP-21369KSWZ-4A from Analog Devices is a 400 MHz, 32-bit/40-bit floating-point SHARC® DSP optimized for high-fidelity automotive audio processing. It integrates 2 Mbits of on-chip SRAM, 6 Mbits of mask-programmable ROM, dual SIMD computational units (PEx/PEy), and audiocentric peripherals including S/PDIF transceiver, 4-channel asynchronous sample rate converter (ASRC), and 16 PWM outputs. It targets real-time audio signal chains in premium car infotainment systems.

For engineers reviewing the ADSP-21369KSWZ-4A datasheet, ADSP-21369KSWZ-4A pinout, ADSP-21369KSWZ-4A application, or ADSP-21369KSWZ-4A equivalent, key selection criteria include core instruction rate (400 MHz), SIMD-enabled 2.4 GFLOPS performance, on-chip memory partitioning (SRAM/ROM), S/PDIF compliance, ASRC dynamic range (128 dB), and BGA_ED package compatibility with automotive thermal and EMI requirements.

Technical Context

The ADSP-21369KSWZ-4A implements a dual-processing-element SIMD architecture with independent PEx and PEy units-each containing ALU, multiplier, shifter, and 40-bit register file-enabling parallel execution of identical instructions on distinct data streams. Its enhanced Harvard architecture supports simultaneous 64-bit PM and DM bus transfers plus instruction cache fetches per cycle.

It features two clock domains: a 400 MHz core domain hosting computation and memory subsystems, and a peripheral domain managing DAI (digital applications interface), DPI (digital peripheral interface), S/PDIF, ASRC, and PWM modules via dedicated 32-bit IOD0/IOD1 buses and flexible signal routing units (SRU).

Key Specifications

Pinout & Package

ADSP-21369KSWZ-4A is packaged in a 256-ball BGA_ED (ball pitch: 1.0 mm, body size: 17 mm × 17 mm) optimized for automotive thermal dissipation and high-density PCB layout. The package supports JTAG boundary scan, thermal pad grounding, and controlled impedance routing for high-speed serial interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21369KSWZ-4A, ADSP-21364KSWZ-4 offers reduced peripheral integration and no ROM-based security, while ADSP-21375KSWZ-4 extends ASRC capability and clock precision-both retain source-code compatibility but differ in memory configuration, security enforcement, and audio interface depth.

Availability

ADSP-21369KSWZ-4A is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, medical ultrasound beamforming, and industrial real-time signal processing requiring stable component supply and long-term lifecycle assurance.

Supply support for ADSP-21369KSWZ-4A 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 Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The SHARC® processor family-including ADSP-21369KSWZ-4A-is engineered for computationally intensive, low-latency audio and signal processing applications where floating-point precision, on-chip memory bandwidth, and integrated digital audio interfaces are critical.

FAQ

What is the maximum operating frequency and instruction throughput of the ADSP-21369KSWZ-4A?

The ADSP-21369KSWZ-4A operates at a maximum core frequency of 400 MHz, achieving a 2.5 ns instruction cycle time. Its dual-SIMD architecture delivers 2.4 GFLOPS peak performance, validated by benchmarks such as 1024-point complex FFT in 23.2 µs and FIR filtering at 1.25 ns per tap-enabling real-time execution of demanding audio algorithms without external acceleration.

Does the ADSP-21369KSWZ-4A support secure boot and code protection?

Yes, the ADSP-21369KSWZ-4A implements ROM-based security with mandatory 64-bit JTAG key authentication. When enabled, it boots exclusively from internal mask-ROM and blocks unauthorized access to code memory. Emulation and external boot modes remain disabled until the correct key is scanned via the JTAG port-ensuring firmware integrity in automotive and industrial deployments.

How many serial audio interfaces does the ADSP-21369KSWZ-4A support, and what protocols are compatible?

The ADSP-21369KSWZ-4A supports eight synchronous serial ports (SPORTs) operating at up to 50 Mbps, plus one integrated S/PDIF transceiver and an input data port (IDP). It natively handles I2S, left-justified, right-justified, and packed I2S protocols with word lengths from 8 to 32 bits-fully compatible with Analog Devices' AD183x audio codecs and standard automotive digital audio links.

Can the ADSP-21369KSWZ-4A generate PWM waveforms for Class-D amplifier control?

Yes, the ADSP-21369KSWZ-4A includes a dedicated PWM module with 16 outputs organized in four groups of four. It supports both center-aligned and edge-aligned waveforms, complementary output pairs, and double-update mode for asymmetrical patterns-enabling precise control of multi-phase Class-D amplifiers with minimized harmonic distortion and configurable dead time.

What external memory interfaces are available on the ADSP-21369KSWZ-4A?

The ADSP-21369KSWZ-4A provides a glueless external port with dual controllers: an asynchronous memory interface (AMI) supporting up to 14M words in Bank 0 and 16M words in Banks 1–3, and an SDRAM controller supporting up to 64M words per bank across four banks. Both interfaces operate on a 32-bit data bus with configurable timing, enabling direct connection to industry-standard SRAM, Flash, and SDRAM devices.