Analog Devices Inc. ADSP-21369BSWZ-1A

Overview

ADSP-21369BSWZ-1A from Analog Devices is a 400 MHz, 32-bit/40-bit floating-point SHARC® DSP optimized for high-fidelity automotive and professional 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 8 serial ports - enabling real-time multi-channel audio effects, active noise cancellation, and digital amplifier control in compact embedded systems.

For engineers reviewing the ADSP-21369BSWZ-1A datasheet, ADSP-21369BSWZ-1A pinout, ADSP-21369BSWZ-1A application, or ADSP-21369BSWZ-1A equivalent, key selection criteria include its 2.4 GFLOPS peak performance at 400 MHz, ROM-based security with 64-bit JTAG key enforcement, 256-ball BGA_ED package compatibility, and dedicated DAI/DPI routing for flexible signal interconnect in audio subsystems.

Technical Context

The ADSP-21369BSWZ-1A implements a dual-processing-element SIMD core with independent ALU/multiplier/shifter units per PE, 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 instruction and four operands via 64-bit PM/DM buses and on-chip instruction cache.

Peripherals are partitioned into two clock domains: the core domain (400 MHz) hosts PEx/PEy, DAGs, and on-chip memory; the I/O processor domain (PCLK) manages DAI (S/PDIF, ASRC, PCG, IDP), DPI (UART, SPI, TWI, timers), and external port (SDRAM/AMI controllers), with SRU-based signal routing enabling software-defined interconnect between all digital audio interfaces.

Key Specifications

Pinout & Package

ADSP-21369BSWZ-1A is packaged in a 256-ball BGA_ED (ball pitch: 1.0 mm, body size: 17 mm × 17 mm) with thermal pad exposed on underside for enhanced heat dissipation in high-power audio processing applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21369BSWZ-1A, ADSP-21364BSWZ-4 offers reduced cost and power but sacrifices S/PDIF and ASRC capability essential for premium audio; ADSP-21375BSWZ-3 adds networking features at the expense of board space and thermal design complexity, making ADSP-21369BSWZ-1A the optimal balance of audio-specific performance, security, and integration for standalone high-fidelity DSP applications.

Availability

ADSP-21369BSWZ-1A is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, and high-end home theater systems requiring stable component supply and long-term lifecycle support.

Supply support for ADSP-21369BSWZ-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 Norwood, MA, with design centers worldwide and a 50+ year heritage in precision signal processing.

The SHARC® processor family - including ADSP-21369BSWZ-1A - was engineered specifically for computationally intensive, low-latency audio and industrial signal processing applications demanding deterministic real-time performance and hardware-enforced security.

FAQ

What is the maximum operating frequency of the ADSP-21369BSWZ-1A?

The ADSP-21369BSWZ-1A operates at a maximum core frequency of 400 MHz, achieving an instruction cycle time of 2.5 ns. This enables 2.4 GFLOPS peak performance for real-time audio algorithms such as 1024-point complex FFT in 23.2 µs. The device's PLL supports multiple multiplier/divider ratios to generate precise clock domains for core, peripherals, and external memory interfaces - all verified in the Rev. H datasheet timing specifications.

Does the ADSP-21369BSWZ-1A support secure boot and firmware protection?

Yes, the ADSP-21369BSWZ-1A implements ROM-based security with mandatory 64-bit JTAG key authentication. When enabled, the processor boots exclusively from internal mask-ROM and disables external code loading and unrestricted JTAG access. Only after scanning the correct customer-assigned key does the device permit emulation or debug - ensuring proprietary audio algorithms remain protected throughout the product lifecycle. This feature is documented in the General Description and On-Chip Memory sections of the datasheet.

Which packages are available for the ADSP-21369BSWZ-1A?

The ADSP-21369BSWZ-1A is offered exclusively in the 256-ball BGA_ED package (17 mm × 17 mm, 1.0 mm ball pitch) with exposed thermal pad. While the ADSP-21369 family also supports a 208-lead LQFP_EP option, the -1A speed grade and BSWZ suffix specifically denote the BGA_ED variant. Package dimensions and soldering guidelines are provided in Pages 58–59 of the Rev. H datasheet.

How many serial audio interfaces does the ADSP-21369BSWZ-1A support?

The ADSP-21369BSWZ-1A integrates eight synchronous serial ports (SPORTs), each configurable for I2S, left-justified, or TDM modes, supporting up to 32 I2S channels or 128 TDM slots per frame. Additionally, it includes a dedicated S/PDIF transceiver and an Input Data Port (IDP) configurable as eight I2S channels or seven I2S plus one 20-bit parallel acquisition port - all interconnected via the DAI Signal Routing Unit (SRU) for maximum flexibility in multi-source audio systems.

Can the ADSP-21369BSWZ-1A perform sample rate conversion between different audio sources?

Yes, the ADSP-21369BSWZ-1A contains four independent asynchronous sample rate converters (ASRC) capable of converting between arbitrary sampling rates (e.g., 44.1 kHz ↔ 48 kHz) with 128 dB SNR performance. Each ASRC handles two channels, enabling simultaneous conversion of eight audio streams - critical for mixing broadcast, streaming, and local playback sources in professional and automotive audio systems without external converters.