Analog Devices Inc. ADSP-21571BSWZ-4

Overview

ADSP-21571BSWZ-4 from Analog Devices is a SHARC+ dual-core floating-point DSP with Arm Cortex-A5 co-processor, operating at 500 MHz per SHARC+ core and featuring 3 MB L1 SRAM (384 kB per core), 1 MB L2 SRAM with ECC, and dual 2× CAN 2.0 interfaces - deployed in automotive infotainment and professional audio processing systems requiring deterministic real-time signal handling.

For engineers reviewing the ADSP-21571BSWZ-4 datasheet, ADSP-21571BSWZ-4 pinout, ADSP-21571BSWZ-4 application, or ADSP-21571BSWZ-4 equivalent, key selection criteria include SHARC+ core clock speed, L1 SRAM partitioning, Arm Cortex-A5 integration for OS support, AEC-Q100 qualification, and 176-lead LQFP_EP package compatibility with thermal and layout constraints in safety-critical embedded designs.

Technical Context

The ADSP-21571BSWZ-4 implements a heterogeneous dual-core architecture: two SHARC+ SIMD cores (500 MHz each) execute high-throughput floating-point signal processing with 32/40/64-bit IEEE formats, while the Arm Cortex-A5 (500 MHz, NEON/VFPv4-D16) handles system control, Linux/RTOS execution, and peripheral management via shared L2 SRAM and system crossbar.

Its memory subsystem includes 3 MB of parity-protected L1 SRAM (configurable as SRAM or cache), 1 MB ECC-protected L2 SRAM, and an L3 interface supporting DDR3L/DDR2/LPDDR1 - enabling low-power external memory expansion without compromising real-time latency for audio buffer streaming or FIR/IIR offload engine operation.

Key Specifications

Pinout & Package

ADSP-21571BSWZ-4 uses a 176-lead LQFP_EP package with exposed pad for thermal management. Pin assignments are defined in Analog Devices' "ADSP-SC57x/ADSP-2157x 176-Lead LQFP Lead Assignments" (Rev. C, pp. 134–137), including dedicated GPIO ports A–D, dual CAN transceivers (CAN0/CAN1), full SPORTs, S/PDIF, and DAI signal routing through the Signal Routing Unit (SRU).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core DSP + application processor applications.

Compared with ADSP-21571BSWZ-4, ADSP-21573BSWZ-4 trades LQFP manufacturability for BGA density and DDR capability, while ADSP-SC571WYZ-4 retains the same package but adds automotive-specific interfaces and qualification - both require schematic and layout revision, not drop-in replacement.

Availability

ADSP-21571BSWZ-4 is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, and industrial motor control systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for ADSP-21571BSWZ-4 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 digital signal processing semiconductors, headquartered in Wilmington, MA.

The ADSP-21571BSWZ-4 belongs to the SHARC+ dual-core DSP family designed for deterministic, high-precision signal processing in safety-critical and latency-sensitive applications across automotive, audio, and industrial markets.

FAQ

What is the maximum operating frequency of each SHARC+ core in the ADSP-21571BSWZ-4?

The ADSP-21571BSWZ-4 features two SHARC+ cores, each operating at a maximum frequency of 500 MHz. This specification is confirmed in Table 2 of the Rev. C datasheet under "SHARC+ Core1 (MHz, Max)" and "SHARC+ Core2 (MHz, Max)", and applies specifically to the ADSP-21571BSWZ-4 variant in the 176-lead LQFP_EP package.

Does the ADSP-21571BSWZ-4 include hardware acceleration for digital filters?

Yes, the ADSP-21571BSWZ-4 integrates dedicated FIR and IIR offload engines as part of its system acceleration subsystem. These accelerators operate independently of the SHARC+ cores and reduce computational load for common filtering tasks - documented in the "ADDITIONAL FEATURES" section and Figure 1 block diagram of the ADSP-21571BSWZ-4 datasheet.

Is the ADSP-21571BSWZ-4 qualified for automotive applications?

No - the ADSP-21571BSWZ-4 is not AEC-Q100 qualified. It belongs to the standard industrial-grade ADSP-2157x series. For automotive use, Analog Devices specifies the ADSP-21571W variant (e.g., ADSP-21571WYZ-4), which carries AEC-Q100 Grade 2 qualification and enhanced thermal specifications per the "Automotive Products" section (p. 140) of the datasheet.

What package type and thermal characteristics does the ADSP-21571BSWZ-4 use?

The ADSP-21571BSWZ-4 uses a 176-lead LQFP_EP package with exposed thermal pad (17 mm × 17 mm, RoHS compliant). Its thermal resistance θJA is 26.5°C/W under JEDEC JESD51-7 conditions, and it supports operation from −40°C to +105°C ambient - specified in the "Outline Dimensions" and "Operating Conditions" sections (pp. 138, 56) of the Rev. C datasheet.

Can the Arm Cortex-A5 core in the ADSP-21571BSWZ-4 run a full Linux distribution?

Yes - the ADSP-21571BSWZ-4's Arm Cortex-A5 core operates at 500 MHz with 32 kB L1 instruction cache, 32 kB L1 data cache, and 256 kB L2 cache (all with parity), enabling execution of lightweight Linux distributions such as Buildroot or Yocto Project-based images. The presence of EMAC, USB 2.0 HS, and SDIO/eMMC support (via optional configuration) further validates its suitability for embedded Linux deployment, as noted in the "Arm Cortex-A5 Processor" section (p. 5).