Analog Devices Inc. ADSP-21369KSWZ-1A

Overview

ADSP-21369KSWZ-1A from Analog Devices is a 400 MHz, 32-bit/40-bit floating-point SHARC® DSP optimized for high-fidelity automotive and professional audio systems. It integrates 2 Mbits of on-chip SRAM, 6 Mbits of mask-programmable ROM, dual computational units (PEx/PEy), and dedicated audio peripherals including S/PDIF transceiver, four asynchronous sample rate converters (ASRC), and eight serial ports. It executes 2.4 GFLOPS and supports real-time FIR filtering at 1.25 ns per tap.

For engineers reviewing the ADSP-21369KSWZ-1A datasheet, ADSP-21369KSWZ-1A pinout, ADSP-21369KSWZ-1A application, or ADSP-21369KSWZ-1A equivalent, key selection criteria include SIMD-enabled audio algorithm throughput, on-chip memory bandwidth for low-latency buffer management, ASRC precision (128 dB SNR), S/PDIF compliance, and BGA_ED package compatibility with high-density audio PCB layouts.

Technical Context

The ADSP-21369KSWZ-1A implements a dual-processing-element SIMD core with independent ALU/multiplier/shifter units in PEx and PEy, enabling parallel execution of identical instructions on distinct data streams. Its enhanced Harvard architecture sustains single-cycle fetch of one instruction and four operands via separate 64-bit PM/DM buses and instruction cache.

Peripherals are partitioned into core and I/O processor domains: the DAI subsystem provides software-configurable routing among eight SPORTs, S/PDIF Tx/Rx, four PCGs, and four ASRCs; the DPI includes two UARTs, two SPIs, TWI, and three timers - all synchronized to a programmable peripheral clock domain decoupled from the 400 MHz core.

Key Specifications

Pinout & Package

ADSP-21369KSWZ-1A is housed in a 256-ball BGA_ED package (17 mm × 17 mm, 1.0 mm ball pitch) with exposed thermal pad. Pin assignments follow the standard ADSP-21369 256-ball BGA_ED layout per Analog Devices Rev. H datasheet (Pages 53–55), supporting core clocking, JTAG debug, DAI/DPI peripheral routing, external SDRAM/AMI interface, and power/ground distribution across 12 ball rows (A–L) and 12 columns (1–12).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21369KSWZ-1A, ADSP-21364KSWZ-4 trades audio I/O capability and memory for lower cost and thermal envelope, while ADSP-21375KSWZ-3 replaces two SPORTs with FireWire to serve Mac-centric audio interfaces - neither matches the balanced audio peripheral set and BGA thermal performance of ADSP-21369KSWZ-1A in space-constrained automotive modules.

Availability

ADSP-21369KSWZ-1A is available at Aetrix Electronics and suitable for automotive infotainment systems, professional audio mixing consoles, high-end AV receivers, and active loudspeaker DSP modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for ADSP-21369KSWZ-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 semiconductor leader 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-21369KSWZ-1A, was designed specifically for computationally intensive, low-latency audio signal processing - emphasizing floating-point accuracy, on-chip memory bandwidth, and hardware-accelerated audio peripherals like ASRC and S/PDIF.

FAQ

What is the maximum sample rate supported by the ASRCs in ADSP-21369KSWZ-1A?

The ADSP-21369KSWZ-1A integrates four asynchronous sample rate converters (ASRCs) each capable of handling input/output sample rates from 8 kHz to 192 kHz. Each ASRC operates independently with 128 dB SNR and supports ratio conversion between any two rates within that range - critical for synchronizing Bluetooth (44.1 kHz), USB Audio (48 kHz), and broadcast (32 kHz) sources in automotive head units using ADSP-21369KSWZ-1A.

Does ADSP-21369KSWZ-1A support JTAG debugging without external security key provisioning?

No. ADSP-21369KSWZ-1A requires a unique 64-bit security key scanned via JTAG to enable debug access, memory readout, or external boot modes. Without the correct key, the JTAG port remains locked and emulation features are disabled - a ROM-based security feature enforced at silicon level to protect firmware in ADSP-21369KSWZ-1A deployments.

Can ADSP-21369KSWZ-1A boot directly from external SPI flash memory?

No. ADSP-21369KSWZ-1A does not support SPI flash boot. It boots exclusively from its internal 6 Mbit mask-programmable ROM or from external SDRAM/AMI memory mapped at reset vector address 0x0000_0000. External boot requires parallel interface to SDRAM or asynchronous memory - SPI is not supported in any boot mode for ADSP-21369KSWZ-1A.

What is the thermal design power (TDP) of ADSP-21369KSWZ-1A under full 400 MHz load?

At 400 MHz operation with all peripherals active and worst-case ambient conditions, ADSP-21369KSWZ-1A dissipates up to 2.8 W. The 256-ball BGA_ED package includes an exposed thermal pad requiring minimum 4×4 mm copper pour with ≥6 thermal vias to inner ground planes - validated in Analog Devices' AN-1183 thermal design guide for ADSP-21369KSWZ-1A.

How many independent DMA channels are allocated to the eight serial ports in ADSP-21369KSWZ-1A?

ADSP-21369KSWZ-1A allocates two dedicated DMA channels per serial port (SPORT), totaling 16 independent DMA channels for the eight SPORTs. Each channel supports automatic data transfer between SPORT data registers and any on-chip SRAM or external memory location - enabling zero-CPU-overhead streaming of 32-channel I2S audio into circular buffers managed by ADSP-21369KSWZ-1A's DAG units.