Analog Devices Inc. ADSP-21371BSWZ-2B

Overview

ADSP-21371BSWZ-2B from Analog Devices is a 32-bit/40-bit floating-point SHARC DSP optimized for high-performance automotive and professional audio processing, featuring a 266 MHz core (3.75 ns instruction cycle), 1 Mbit on-chip SRAM, 4 Mbit mask-programmable ROM, S/PDIF transceiver, and eight dual-data-line serial ports operating up to 33 Mbps per line.

For engineers reviewing the ADSP-21371BSWZ-2B datasheet, ADSP-21371BSWZ-2B pinout, ADSP-21371BSWZ-2B application, or ADSP-21371BSWZ-2B equivalent, key selection considerations include SIMD computational throughput (1.596 GFLOPS at 266 MHz), ROM-based security with 64-bit JTAG key enforcement, DAI-configurable signal routing, and 208-lead LQFP_EP packaging for thermal management in dense audio subsystems.

Technical Context

The ADSP-21371BSWZ-2B implements a dual-processing-element SIMD core (PEX and PEY) with independent ALU/multiplier/shifter units supporting IEEE 32-bit single-precision and 40-bit extended-precision floating-point arithmetic in a single cycle. Its enhanced Harvard architecture enables simultaneous fetch of one 48-bit instruction and four 32-bit operands via separate PM and DM buses.

Peripherals are partitioned into two clock domains: the core domain hosts on-chip memory, DAGs, and instruction cache, while the I/O processor domain integrates the Digital Applications Interface (DAI) with S/PDIF Tx/Rx, eight SPORTs, four PCGs, IDP, and DPI peripherals including SPI, TWI, UART, and PWM - all accessible through software-configurable signal routing units (DAI SRU/DPI SRU).

Key Specifications

Pinout & Package

ADSP-21371BSWZ-2B is housed in a thermally enhanced 208-lead LQFP_EP (Leadless Quad Flat Package with Exposed Pad), measuring 28 mm × 28 mm with 0.5 mm pitch. The exposed pad improves thermal dissipation for sustained 266 MHz operation in automotive audio amplifiers and active noise cancellation modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21371BSWZ-2B, ADSP-21375BSWZ-2A trades memory, S/PDIF, and PWM for lower cost and power, while ADSP-21479KSWZ-4 adds networking interfaces and 50% more compute at the expense of higher thermal design complexity and package size.

Availability

ADSP-21371BSWZ-2B is available at Aetrix Electronics and suitable for automotive infotainment systems, professional audio equipment, studio monitors, and high-end home theater receivers requiring stable component supply and long-term industrial lifecycle support.

Supply support for ADSP-21371BSWZ-2B 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 communications infrastructure.

The SHARC processor family, including ADSP-21371BSWZ-2B, was designed specifically for computationally intensive real-time audio and motor control applications demanding deterministic low-latency floating-point performance and flexible peripheral integration.

FAQ

What is the maximum operating frequency of the ADSP-21371BSWZ-2B?

The ADSP-21371BSWZ-2B operates at a guaranteed maximum core frequency of 266 MHz, corresponding to a 3.75 ns instruction cycle time. This rating is validated across temperature and voltage ranges per Analog Devices' Rev. D datasheet specifications and supports sustained 1.596 GFLOPS SIMD performance under thermal design limits defined for the 208-lead LQFP_EP package.

Does the ADSP-21371BSWZ-2B support secure boot from internal ROM?

Yes, the ADSP-21371BSWZ-2B implements ROM-based security with mandatory 64-bit JTAG key authentication. When enabled, the device boots exclusively from internal mask-programmable ROM and blocks unauthorized JTAG access until the correct key is scanned. This prevents firmware extraction and ensures secure deployment in automotive and premium audio applications.

How many serial ports does the ADSP-21371BSWZ-2B include, and what is their maximum data rate?

The ADSP-21371BSWZ-2B includes eight dual-data-line serial ports (SPORT0–SPORT7), each configurable as independent transmitter/receiver pairs. Each data line supports up to 33 Mbps, enabling high-bandwidth TDM or I²S streaming for multichannel audio systems without external framing logic.

Can the ADSP-21371BSWZ-2B generate S/PDIF-compliant digital audio signals?

Yes, the ADSP-21371BSWZ-2B integrates a fully compliant S/PDIF transceiver supporting both transmission and reception per IEC-60958 standards. It handles channel status encoding, jitter reduction, and automatic format detection, allowing direct connection to optical or coaxial audio interfaces without external transceivers.

What package type and thermal characteristics apply to the ADSP-21371BSWZ-2B?

The ADSP-21371BSWZ-2B uses a 208-lead LQFP_EP package with an exposed thermal pad. Its thermal resistance θ_JA is specified at 23.5°C/W under JEDEC JESD51-7 conditions, enabling reliable operation at 266 MHz in automotive ambient temperatures up to 105°C when mounted on a 4-layer PCB with adequate copper pour under the exposed pad.