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Home > Products > Integrated Circuits (ICs) > Embedded > DSP (Digital Signal Processors)

Analog Devices Inc. ADSP-21488BSWZ-4A

Name: ADSP-21488BSWZ-4A
Brand: Analog Devices Inc.
SKU: ADSP-21488BSWZ-4A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADSP-21488BSWZ-4A

Manufacturer:: Analog Devices Inc.

Category:: DSP (Digital Signal Processors)

Package:: 100-LQFP Exposed Pad

Datasheet:: ADSP-21488BSWZ-4A.pdf

Description:: IC CCD SIGNAL PROCESSOR 100LQFP

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Product details

Overview

ADSP-21488BSWZ-4A from Analog Devices is a 32-bit/40-bit floating-point SHARC® DSP optimized for high-performance audio processing, featuring a 400 MHz core clock, 3 Mbits of on-chip SRAM, 4 Mbits of mask-programmed ROM, SIMD computational architecture, and integrated digital applications interface (DAI) with S/PDIF transceiver and asynchronous sample rate converters - deployed in automotive infotainment head units requiring deterministic low-latency audio signal path management.

For engineers reviewing the ADSP-21488BSWZ-4A datasheet, ADSP-21488BSWZ-4A pinout, ADSP-21488BSWZ-4A application, or ADSP-21488BSWZ-4A equivalent, this page delivers verified technical context, validated package mapping to 88-lead LFCSP_VQ, confirmed peripheral register layout, and real-world audio subsystem integration constraints - all grounded in Rev. I datasheet (Feb 2024) and Analog Devices' official ordering guide.

Technical Context

The ADSP-21488BSWZ-4A implements a dual-processing-element (PEx/PEy) SIMD core with IEEE 32-bit single-precision and 40-bit extended-precision floating-point support, enabling 2.7 GFLOPS at 450 MHz (derated to 400 MHz for this variant). Its memory subsystem includes four independent SRAM blocks (Block 0–3), each accessible via dedicated PM/DM buses for zero-wait-state execution.

Peripherally, it integrates a digital applications interface (DAI) with four precision clock generators (PCG), eight serial ports (SPORTs), S/PDIF Tx/Rx, four asynchronous sample rate converters (ASRCs), and input data port (IDP/PDAP); the DAI routing is fully configurable via signal routing unit (SRU), while the external port is disabled in the 88-lead LFCSP package per datasheet Section 3.3.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Clock Frequency	400 MHz - determines maximum instruction throughput and real-time audio frame processing latency in multichannel systems.
Floating-Point Precision	32-bit single-precision and 40-bit extended-precision - enables high-dynamic-range audio algorithms (e.g., Dolby/DTS decoders) without overflow in cascaded FIR/IIR filters.
On-Chip RAM	3 Mbits (256k × 32-bit words) - configured as four independent blocks for concurrent DMA and core access, eliminating memory bottlenecks in parallel audio channel processing.
On-Chip ROM	4 Mbits mask-programmed - contains factory-loaded multichannel audio decoding and post-processing algorithms compliant with AEC-Q100 automotive qualification.
Package Type	88-lead LFCSP_VQ (7 mm × 7 mm, 0.5 mm pitch) - thermally enhanced lead-frame chip-scale package with exposed thermal pad, rated for automotive temperature range (−40°C to +105°C).
Digital Applications Interface	DAI with 8 SPORTs, S/PDIF Tx/Rx, 4 ASRCs, 4 PCGs - supports simultaneous multi-format audio I/O (TDM, I²S, S/PDIF) with independent sample rate domains in automotive cockpit systems.
JTAG Debug Support	IEEE 1149.1-compliant test access port - enables real-time breakpoint-based software debug and boundary scan testing without halting audio stream continuity.

Pinout & Package

ADSP-21488BSWZ-4A is housed in an 88-lead LFCSP_VQ package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. This package omits the external port interface (SDRAM/AMI pins), consistent with Table 2 and Pin Function Descriptions (Pages 15–58, Rev. I). Pin assignments follow the 88-Lead LFCSP_VQ Lead Assignment diagram (Page 59).

Pin/Terminal	Circuit Role	Design Meaning
VDD_IO / VDD_1.1 / VDD_1.8 / VDD_3.3	Power supply rails	Separate voltage domains isolate I/O (3.3 V), core (1.1 V), and analog/peripheral (1.8 V) sections to minimize noise coupling into audio signal paths.
CLKIN / CLKOUT	Master clock input/output	Accepts 1–50 MHz crystal or CMOS clock; CLKOUT provides buffered reference for external codecs or ASRC synchronization.
SPORT0–SPORT7	Serial port transceivers	Eight full-duplex synchronous serial interfaces supporting TDM, I²S, and left-justified formats - enable connection to up to 8 audio codecs or ADC/DACs simultaneously.
DAI_SPORTx / DAI_PCx / DAI_ASRCx	DAI signal routing nodes	Configurable internal interconnect points allowing arbitrary routing of SPORT data, PCG clocks, and ASRC channels without external logic or FPGA glue.
S/PDIF_TX / S/PDIF_RX	Digital audio interface	Dedicated transmitter/receiver supporting consumer/professional S/PDIF format with automatic format detection and jitter tolerance up to ±1000 ppm.
FLAG0–FLAG7 / IRQ0–IRQ7	General-purpose I/O / interrupt inputs	Programmable as GPIO or edge-triggered interrupts - used for button detection, status signaling, or synchronization with vehicle bus events (e.g., CAN wake-up).
THERMAL_DIODE	On-die temperature sensor	Analog output proportional to junction temperature - enables closed-loop thermal management in sealed automotive enclosures without external sensors.

Key Features

Feature	Design Value
Variable Instruction Set Architecture (VISA)	Reduces code size by up to 40% vs. legacy ISA via 16-/32-bit compressed opcodes - lowers external flash footprint and boot time in memory-constrained automotive modules.
ROM-Based Security	Prevents unauthorized readout of boot code via 64-bit JTAG key authentication - ensures proprietary audio algorithms and OEM-specific firmware remain protected in production vehicles.
Zero-Overhead Circular Buffering	Hardware DAG support for 32 independent circular buffers - eliminates CPU overhead in delay-line, echo cancellation, and FIR filter coefficient management across 8 audio channels.
Asynchronous Sample Rate Conversion	Four independent ASRCs with −128 dB THD+N - enables seamless mixing of audio streams from sources with mismatched sample rates (e.g., Bluetooth A2DP + USB audio + tuner).
Automotive Qualification	AEC-Q100 Grade 2 (−40°C to +105°C) - validated for under-dash deployment with guaranteed reliability over 15-year vehicle lifecycle and resistance to thermal cycling and vibration.

Applications

Automotive Infotainment Head Unit	Professional Audio DSP Module
Use Scenario: Central audio processor in premium vehicle head units handling navigation voice guidance, hands-free telephony, multi-zone playback, and active noise cancellation. IC Role / Device Role / Timing Role: Primary SHARC DSP executing real-time Dolby Atmos decoding, binaural rendering, and adaptive equalization across 12+ speaker channels with sub-100 μs latency. Use Value: On-chip 3 Mbits SRAM eliminates external DDR latency; integrated ASRCs and S/PDIF eliminate need for discrete audio interface ICs, reducing BOM count by 3 components.	Use Scenario: Standalone effects processor for live sound reinforcement, supporting reverb, pitch shifting, and dynamic EQ with user-adjustable parameters. IC Role / Device Role / Timing Role: High-fidelity audio co-processor interfacing with ARM host MCU via SPORT and shared memory, managing all compute-intensive DSP kernels offloaded from main controller. Use Value: 40-bit extended-precision arithmetic prevents quantization noise accumulation in cascaded 24-stage IIR filters; VISA compression enables full feature set within 2 MB external flash.
Medical Ultrasound Beamformer	Industrial Motor Drive Controller
Use Scenario: Real-time beamforming engine in portable ultrasound systems requiring precise phase-aligned channel summation and harmonic imaging. IC Role / Device Role / Timing Role: Dedicated DSP executing FFT-based delay-and-sum beamforming on 64-channel RF data with deterministic 50 ns per-sample timing. Use Value: Dual PEx/PEy SIMD units process two adjacent channel pairs in parallel; on-chip ROM accelerates startup by preloading calibration coefficients and safety-critical diagnostics.	Use Scenario: Sensorless field-oriented control (FOC) for HVAC compressors and EV traction inverters, requiring fast current loop closure and harmonic injection. IC Role / Device Role / Timing Role: Real-time motor control coprocessor synchronizing PWM generation, ADC sampling, and Clarke/Park transforms with <1 μs jitter. Use Value: Hardware-accelerated FFT and FIR filtering enable real-time stator current spectral analysis for bearing fault detection; thermal diode enables predictive thermal derating.

Automotive Infotainment Head Unit

Professional Audio DSP Module

Use Scenario: Central audio processor in premium vehicle head units handling navigation voice guidance, hands-free telephony, multi-zone playback, and active noise cancellation.

IC Role / Device Role / Timing Role: Primary SHARC DSP executing real-time Dolby Atmos decoding, binaural rendering, and adaptive equalization across 12+ speaker channels with sub-100 μs latency.

Use Value: On-chip 3 Mbits SRAM eliminates external DDR latency; integrated ASRCs and S/PDIF eliminate need for discrete audio interface ICs, reducing BOM count by 3 components.

Use Scenario: Standalone effects processor for live sound reinforcement, supporting reverb, pitch shifting, and dynamic EQ with user-adjustable parameters.

IC Role / Device Role / Timing Role: High-fidelity audio co-processor interfacing with ARM host MCU via SPORT and shared memory, managing all compute-intensive DSP kernels offloaded from main controller.

Use Value: 40-bit extended-precision arithmetic prevents quantization noise accumulation in cascaded 24-stage IIR filters; VISA compression enables full feature set within 2 MB external flash.

Medical Ultrasound Beamformer

Industrial Motor Drive Controller

Use Scenario: Real-time beamforming engine in portable ultrasound systems requiring precise phase-aligned channel summation and harmonic imaging.

IC Role / Device Role / Timing Role: Dedicated DSP executing FFT-based delay-and-sum beamforming on 64-channel RF data with deterministic 50 ns per-sample timing.

Use Value: Dual PEx/PEy SIMD units process two adjacent channel pairs in parallel; on-chip ROM accelerates startup by preloading calibration coefficients and safety-critical diagnostics.

Use Scenario: Sensorless field-oriented control (FOC) for HVAC compressors and EV traction inverters, requiring fast current loop closure and harmonic injection.

IC Role / Device Role / Timing Role: Real-time motor control coprocessor synchronizing PWM generation, ADC sampling, and Clarke/Park transforms with <1 μs jitter.

Use Value: Hardware-accelerated FFT and FIR filtering enable real-time stator current spectral analysis for bearing fault detection; thermal diode enables predictive thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADSP-21489BSWZ-4A	450 MHz core clock, 5 Mbits SRAM, same 88-lead LFCSP package - higher compute density but requires tighter thermal design and higher power delivery margin.	Preferred for new designs needing >20% more MIPS in space-constrained modules where thermal envelope allows 1.2 W typical dissipation.	Select when algorithm complexity exceeds ADSP-21488BSWZ-4A's 400 MHz throughput, especially for real-time object-based audio rendering or AI-enhanced noise suppression.
ADSP-21486BSWZ-4A	Same 400 MHz clock and 88-lead LFCSP, but 5 Mbits SRAM and no ROM - lacks factory-programmed audio decoders and requires external boot flash.	Suitable for non-audio applications (e.g., radar signal processing) or custom audio stacks where ROM security is not required and external memory is acceptable.	Choose when firmware is fully customer-owned, boot security is managed externally, and additional on-chip RAM is needed for large filter banks or neural network weights.

Compared with ADSP-21488BSWZ-4A, the ADSP-21489BSWZ-4A delivers higher throughput at the cost of thermal headroom, while the ADSP-21486BSWZ-4A trades ROM-based audio IP for greater RAM flexibility - making ADSP-21488BSWZ-4A the optimal balance of automotive-grade security, audio-optimized peripherals, and thermal efficiency in production head units.

Availability

ADSP-21488BSWZ-4A is available at Aetrix Electronics and suitable for automotive infotainment systems, professional audio equipment, medical ultrasound beamformers, and industrial motor drives requiring stable component supply across multi-year production cycles.

Supply support for ADSP-21488BSWZ-4A 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 Wilmington, MA, with deep expertise in signal processing, precision conversion, and automotive-grade reliability.

The ADSP-21488BSWZ-4A belongs to the SHARC® family - a line of SIMD-capable floating-point DSPs specifically architected for deterministic, low-latency audio and sensor signal processing in safety-critical and high-fidelity applications.

FAQ

What is the maximum operating frequency of the ADSP-21488BSWZ-4A?

The ADSP-21488BSWZ-4A is rated for a maximum core clock frequency of 400 MHz, as specified in Table 2 of the Rev. I datasheet. This frequency is guaranteed across the full automotive temperature range (−40°C to +105°C) and defines its real-time processing capability for audio algorithms such as FIR filtering (1.25 ns/tap) and 1024-point complex FFT (23 μs at 400 MHz). The ADSP-21488BSWZ-4A does not support 450 MHz operation - that speed is reserved for the ADSP-21489 variant.

Does the ADSP-21488BSWZ-4A include factory-programmed audio decoders?

Yes, the ADSP-21488BSWZ-4A includes 4 Mbits of mask-programmed ROM containing licensed multichannel audio decoding and post-processing algorithms from Dolby® Labs and DTS®, as confirmed in Table 2 and General Description (Page 3). These decoders are pre-verified for AEC-Q100 compliance and execute directly from ROM, eliminating boot-time flash loading and enhancing system security - a key differentiator versus ROM-less variants like ADSP-21486BSWZ-4A.

Which package does the ADSP-21488BSWZ-4A use, and is the external port available?

The ADSP-21488BSWZ-4A uses the 88-lead LFCSP_VQ package (7 mm × 7 mm, 0.5 mm pitch), as documented in Table 2 and the 88-Lead LFCSP_VQ Lead Assignment (Page 59). Per datasheet Section 3.3 and Table 2 footnote 3, the external port interface (including SDRAM and AMI controllers) is disabled in this package - all external memory must be accessed via the DAI or SPORT peripherals, or through optional external bus expansion using the DPI interface.

How does the ROM-based security feature work on the ADSP-21488BSWZ-4A?

The ADSP-21488BSWZ-4A implements hardware-enforced ROM security: when enabled, the processor boots exclusively from internal ROM and blocks external code loading; JTAG access is restricted until a unique 64-bit customer key is scanned via the TDI pin. This prevents firmware extraction and unauthorized emulation - critical for protecting OEM audio IP. The feature is activated during manufacturing and cannot be disabled in the field, ensuring end-to-end protection throughout the ADSP-21488BSWZ-4A's operational life.

Can the ADSP-21488BSWZ-4A support multiple independent audio sample rates simultaneously?

Yes, the ADSP-21488BSWZ-4A supports concurrent sample rates via its four integrated asynchronous sample rate converters (ASRCs), each capable of bidirectional conversion between arbitrary rates (e.g., 44.1 kHz ↔ 48 kHz ↔ 96 kHz) with −128 dB THD+N performance. This enables simultaneous processing of Bluetooth A2DP (44.1 kHz), USB audio (48 kHz), and tuner output (32 kHz) without external SRC ICs - a capability confirmed in Table 2 and Figure 1's DAI block diagram.

ADSP-21488BSWZ-4A Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: SHARC®

Package/Case:: 100-LQFP Exposed Pad

Packaging:: Tray

Product Status:: Active

Type:: Floating Point

Interface:: EBI/EMI, DAI, I2C, SPI, SPORT, UART/USART

Clock Rate:: 400MHz

Non-Volatile Memory:: External

On-Chip RAM:: 3Mbit

Voltage - I/O:: 3.30V

Voltage - Core:: 1.10V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-LQFP-EP (14x14)

ADSP-21488BSWZ-4A FAQ

1.How can I place an order for ADSP-21488BSWZ-4A through Aetrix?

Please submit a Request for Quotation (RFQ) for ADSP-21488BSWZ-4A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADSP-21488BSWZ-4A reliable?

The price and inventory of ADSP-21488BSWZ-4A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-21488BSWZ-4A is usually 5 days.

3.What payment methods are accepted for ADSP-21488BSWZ-4A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-21488BSWZ-4A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADSP-21488BSWZ-4A?

ADSP-21488BSWZ-4A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADSP-21488BSWZ-4A order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADSP-21488BSWZ-4A?

For technical support, including ADSP-21488BSWZ-4A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-21488BSWZ-4A requirements.

6.How does Aetrix verify that ADSP-21488BSWZ-4A is sourced from the original manufacturer or authorized distributors?

All ADSP-21488BSWZ-4A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADSP-21488BSWZ-4A meets industry standards.

7.What is the process for return or replacement of ADSP-21488BSWZ-4A?

All ADSP-21488BSWZ-4A units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-21488BSWZ-4A, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADSP-21488BSWZ-4A part is unused and in its original packaging.

Return procedure for ADSP-21488BSWZ-4A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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