Analog Devices Inc. ADSP-21364YSWZ-2AA

Overview

ADSP-21364YSWZ-2AA from Analog Devices is a 32-/40-bit floating-point SHARC® DSP optimized for high-performance automotive audio processing, featuring 333 MHz core instruction rate, 3M bits of on-chip SRAM, 4M bits of mask-programmable ROM, and integrated S/PDIF transceiver with DTCP support. It executes two GFLOPS in SIMD mode and targets premium car audio head units and active noise cancellation systems.

For engineers reviewing the ADSP-21364YSWZ-2AA datasheet, ADSP-21364YSWZ-2AA pinout, ADSP-21364YSWZ-2AA application, or ADSP-21364YSWZ-2AA equivalent, key selection criteria include its 144-lead LQFP_EP package, 8-channel ASRC with –140 dB SNR, ROM-based JTAG security with 64-bit key, and dedicated DAI peripherals including PCG, IDP, and SRU routing.

Technical Context

The ADSP-21364YSWZ-2AA implements a dual-processing-element SIMD core (PEX/PEY), each with ALU, multiplier, shifter, and 40-bit register file, enabling parallel execution of identical instructions on independent data streams. Its enhanced Harvard architecture supports simultaneous single-cycle fetch of one 48-bit instruction and four 32-bit operands via PM/DM buses and instruction cache.

It integrates a digital audio interface (DAI) with six full-duplex serial ports, two SPI-compatible interfaces, S/PDIF Tx/Rx, eight-channel asynchronous sample rate converter (ASRC), precision clock generators (PCG A/B), and signal routing unit (SRU) for flexible peripheral interconnection - all operating under independent PCLK domain separate from core CLK.

Key Specifications

Pinout & Package

The ADSP-21364YSWZ-2AA is housed in a 144-lead LQFP_EP (exposed pad) package with 0.5 mm pitch, designed for thermal management in automotive audio amplifiers and head units. Pin assignments follow the standard ADSP-2136x LQFP_EP configuration per Analog Devices Rev. J datasheet, Pages 48–49.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21364YSWZ-2AA, the ADSP-21365YSWZ-2AA adds ROM-resident decoders and DTCP, while the ADSP-21364KBZ-2A offers identical functionality in a smaller BGA package - both require no firmware or algorithm changes but differ in physical integration and security licensing scope.

Availability

ADSP-21364YSWZ-2AA is available at Aetrix Electronics and suitable for automotive infotainment, premium audio amplification, active noise cancellation, and digital soundbar applications requiring stable component supply and long-term lifecycle support.

Supply support for ADSP-21364YSWZ-2AA 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and audio systems.

The ADSP-21364YSWZ-2AA belongs to the SHARC® family of SIMD DSPs engineered specifically for computationally intensive, low-latency audio signal processing in automotive and professional audio equipment.

FAQ

What is the maximum core clock frequency supported by the ADSP-21364YSWZ-2AA?

The ADSP-21364YSWZ-2AA operates at a guaranteed maximum core instruction rate of 333 MHz, delivering two GFLOPS in SIMD mode. This frequency is validated across automotive temperature ranges (–40°C to +105°C) and enables real-time execution of demanding audio algorithms such as 1024-point FFT in 27.9 μs. The PLL supports flexible multiplier/divider ratios to derive this clock from standard crystal inputs.

Does the ADSP-21364YSWZ-2AA include on-chip ROM for audio decoder storage?

No, the ADSP-21364YSWZ-2AA contains 4M bits of mask-programmable ROM but does not include licensed audio decoders (e.g., Dolby Digital EX, DTS 96/24) in ROM. Those decoders are present only in the ADSP-21365YSWZ-2AA and ADSP-21366YSWZ-2AA variants. The ADSP-21364YSWZ-2AA relies on external memory or runtime loading for such algorithms.

How does the S/PDIF interface on the ADSP-21364YSWZ-2AA differ from standard implementations?

The ADSP-21364YSWZ-2AA integrates a fully self-contained S/PDIF transceiver that performs biphase encoding/decoding in hardware, accepts 16–24-bit word widths in I2S/left-justified/right-justified formats, and routes clock/frame sync through the SRU for flexible source selection. Unlike external transceivers, it requires no external line drivers or receivers and shares DMA resources with other DAI peripherals.

Can the ADSP-21364YSWZ-2AA perform sample rate conversion without CPU intervention?

Yes, the ADSP-21364YSWZ-2AA includes four hardware ASRC blocks capable of synchronous or asynchronous sample rate conversion across independent stereo channels at up to –140 dB SNR. Each block operates autonomously using dedicated DMA channels, freeing the SIMD core for other audio processing tasks while maintaining bit-perfect timing integrity.

What thermal considerations apply to the ADSP-21364YSWZ-2AA in automotive applications?

The ADSP-21364YSWZ-2AA uses a 144-lead LQFP_EP package with an exposed thermal pad rated for operation from –40°C to +105°C. Its maximum power dissipation is 2.8 W under typical automotive conditions; proper PCB design must include ≥4 thermal vias under the pad connected to a solid ground plane to maintain junction temperature below 125°C during sustained 333 MHz operation.