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Analog Devices Inc. ADSP-21375KSWZ-2B
- Part No.:
- ADSP-21375KSWZ-2B
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 208-LQFP Exposed Pad
- Datasheet:
-
ADSP-21375KSWZ-2B.pdf
- Description:
- IC DSP 32BIT 266MHZ 208-MQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADSP-21375KSWZ-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), 0.5 Mbit on-chip SRAM, 2 Mbit mask-programmable ROM, four serial ports, and digital applications interface (DAI) with four precision clock generators and input data port (IDP). It executes 1.596 GFLOPS in SIMD mode and supports IEEE 32-bit single-precision and 40-bit extended-precision floating-point arithmetic.
For engineers reviewing the ADSP-21375KSWZ-2B datasheet, ADSP-21375KSWZ-2B pinout, ADSP-21375KSWZ-2B application, or ADSP-21375KSWZ-2B equivalent, key selection considerations include its 208-lead LQFP_EP package, absence of S/PDIF transceiver and PWM outputs (vs. ADSP-21371), 266 MHz fixed-frequency operation, ROM-based security with 64-bit JTAG key, and dual-domain architecture separating core and I/O processor clocks.
Technical Context
The ADSP-21375KSWZ-2B implements a dual-processing-element SIMD core (PEX and PEY) with independent ALU, multiplier, and shifter units per element, supporting parallel 32-bit/40-bit floating-point operations. Its enhanced Harvard architecture enables single-cycle fetch of one 48-bit instruction and four 32-bit operands via separate PM and DM buses plus instruction cache.
It features two clock domains: a 266 MHz core domain hosting computational units, DAGs, and on-chip memory; and a peripheral domain managing DAI (four serial ports, PCG, IDP), DPI (SPI, TWI, UART), external port (SDRAM/AMI controllers), and timer resources - all interconnected via crossbar and signal routing units (DAI SRU/DPI SRU).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Frequency | 266 MHz (3.75 ns instruction cycle); fixed-rate operation requiring no external PLL configuration. |
| Floating-Point Performance | 1.596 GFLOPS in SIMD mode; enables real-time execution of complex audio algorithms like FIR/IIR filtering and FFT. |
| On-Chip Memory | 0.5 Mbit SRAM + 2 Mbit mask-ROM; supports mixed code/data allocation with single-cycle access by core and I/O processor. |
| Digital Applications Interface | Four serial ports (up to 33 Mbps each), four precision clock generators (PCG), and input data port (IDP); configurable via DAI SRU for flexible peripheral interconnect. |
| External Memory Interface | 32-bit EPD bus with SDRAM controller (up to 256 MB per bank) and asynchronous memory controller (four banks, programmable timing). |
| Security Features | ROM-based boot security with 64-bit JTAG key; disables external boot and restricts JTAG access unless correct key is scanned. |
| Package | 208-lead LQFP_EP (exposed pad); thermal performance optimized for sustained 266 MHz operation in automotive/audio environments. |
Pinout & Package
ADSP-21375KSWZ-2B is housed in a 208-lead LQFP_EP (Leadless Quad Flat Package with Exposed Pad), measuring 28 mm × 28 mm × 1.4 mm, with 0.5 mm lead pitch and thermally enhanced exposed die pad for improved heat dissipation in high-clock-frequency audio processing applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_INT | Core power supply | 1.0 V supply for 266 MHz core logic; requires low-noise regulation and local decoupling. |
| VDD_IO | I/O power supply | 3.3 V supply for all digital I/O including DAI, DPI, and external port pins. |
| CLKIN | Primary clock input | Accepts 266 MHz crystal or oscillator input; drives core clock domain directly. |
| RESET | Asynchronous reset input | Active-low signal initiating full hardware reset; must be held low for ≥100 ns after power stabilization. |
| TCK/TMS/TDO/TDI | JTAG test access port | IEEE 1149.1-compliant interface for emulation, boundary scan, and secure debug with 64-bit key authentication. |
| DAI_P1–DAI_P20 | Digital applications interface pins | Configurable I/O for serial port signals, PCG outputs, IDP inputs, and DAI SRU-routed functions. |
| EP_A0–EP_A23 | External port address lines | 24-bit address bus for SDRAM/AMI memory mapping; supports up to 16 MB per asynchronous bank. |
| EP_D0–EP_D31 | External port data lines | 32-bit bidirectional data bus enabling 532 MB/s SDRAM throughput at 133 MHz peripheral clock. |
Key Features
| Feature | Design Value |
|---|---|
| SIMD computational engine | Two parallel processing elements (PEX/PEY) executing identical instructions on independent data streams, doubling throughput for vectorized audio math. |
| Instruction cache | Selective 48-bit instruction caching reduces PM bus contention, enabling full-speed looped operations like filter MACs without pipeline stalls. |
| Digital Applications Interface (DAI) | Software-configurable signal routing (DAI SRU) connects four serial ports, four PCGs, and IDP to any of 20 DAI pins - eliminating fixed-function pin constraints. |
| On-chip memory architecture | Four independent memory blocks (ROM/SRAM) with dual-bus access (PM/DM) allow simultaneous core and I/O processor reads/writes at full speed. |
| ROM-based security | Prevents unauthorized firmware extraction and external boot; enforces JTAG access control via customer-specific 64-bit key programmed during manufacturing. |
Applications
| Automotive Infotainment Head Unit | Professional Digital Mixing Console |
|---|---|
Use Scenario: Real-time multi-channel audio processing in vehicle head units with equalization, surround sound decoding, and noise cancellation. IC Role / Device Role / Timing Role: Primary audio DSP executing floating-point FIR filters, FFT-based acoustic analysis, and dynamic range compression at 266 MHz. Use Value: 0.5 Mbit SRAM + 2 Mbit ROM enables storage of calibrated audio profiles and boot-time secure firmware; DAI serial ports interface directly to ADC/DAC arrays without glue logic. | Use Scenario: Low-latency channel processing in live sound consoles handling 32+ analog inputs with parametric EQ, dynamics, and effects. IC Role / Device Role / Timing Role: Core signal processor running time-critical audio algorithms with deterministic 3.75 ns instruction timing and zero-overhead circular buffers. Use Value: Four precision clock generators (PCG) synchronize multiple audio sample rates (44.1/48/96 kHz); 208-pin LQFP_EP provides sufficient I/O for dense analog I/O expansion. |
| High-End Home Theater AV Receiver | Medical Ultrasound Beamformer |
Use Scenario: Multi-format audio decoding (Dolby Atmos, DTS:X) combined with room correction and speaker management in premium AV receivers. IC Role / Device Role / Timing Role: Dedicated SHARC DSP offloading computationally intensive beamforming and spatial audio rendering from main SoC. Use Value: 1.596 GFLOPS SIMD performance ensures real-time 3D audio rendering; ROM security protects proprietary room-correction algorithms from reverse engineering. | Use Scenario: Real-time digital beamforming in portable ultrasound systems requiring precise phase-aligned delay calculations across 128+ channels. IC Role / Device Role / Timing Role: High-precision floating-point engine performing time-of-flight delay compensation and apodization weighting in fixed 266 MHz timing domain. Use Value: 40-bit extended-precision floating-point format minimizes quantization error in deep pipeline beamformer calculations; DAI IDP accepts raw ADC samples directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-21371KSWZ-2B | Includes S/PDIF transceiver, 8 serial ports, 1 Mbit SRAM, 4 Mbit ROM, and 16 PWM outputs; same 266 MHz core and 208-LQFP_EP package. | Supports S/PDIF digital audio I/O and motor control PWM; suitable for integrated audio+control systems where ADSP-21375KSWZ-2B lacks those peripherals. | Select ADSP-21371KSWZ-2B when S/PDIF connectivity or expanded serial I/O bandwidth is required; ADSP-21375KSWZ-2B offers cost and footprint optimization where those features are unused. |
| ADSP-21479KSWZ-2A | Higher 400 MHz core (2.5 ns), 512 kB L1 SRAM, 256 kB L2 SRAM, DDR2 controller, and enhanced DAI with S/PDIF; 256-ball CSPBGA package. | Targets next-generation audio systems needing higher throughput, larger memory, and DDR2 interfacing; not pin-compatible and requires PCB redesign. | Choose ADSP-21479KSWZ-2A for new designs demanding >2× compute density and DDR2 memory expansion; ADSP-21375KSWZ-2B remains optimal for cost-sensitive, space-constrained legacy audio platforms. |
Compared with ADSP-21371KSWZ-2B, ADSP-21375KSWZ-2B reduces SRAM/ROM capacity and removes S/PDIF/PWM to lower BOM cost and power, while retaining identical core performance and DAI flexibility; versus ADSP-21479KSWZ-2A, it trades higher clock rate and DDR2 support for proven 208-LQFP_EP manufacturability and lower system-level thermal design complexity.
Availability
ADSP-21375KSWZ-2B is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, and medical ultrasound beamforming requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADSP-21375KSWZ-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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications infrastructure.
The ADSP-21375KSWZ-2B belongs to the SHARC family of SIMD floating-point DSPs, designed specifically for deterministic, low-latency audio and sensor signal processing in automotive, professional audio, and medical imaging systems.
FAQ
What is the maximum operating frequency of the ADSP-21375KSWZ-2B?
The ADSP-21375KSWZ-2B operates at a fixed 266 MHz core frequency (3.75 ns instruction cycle), as specified in the official Analog Devices datasheet Rev. D. This frequency is factory-trimmed and not user-adjustable via PLL configuration; external clock source must deliver 266 MHz directly to CLKIN. The device achieves 1.596 GFLOPS in SIMD mode at this rate, validated across temperature and voltage ranges.
Does the ADSP-21375KSWZ-2B support S/PDIF audio interface?
No, the ADSP-21375KSWZ-2B does not include an S/PDIF transceiver. Per Table 2 in the ADSP-21371/ADSP-21375 Rev. D datasheet, S/PDIF is present only on the ADSP-21371 variant. The ADSP-21375KSWZ-2B retains four precision clock generators (PCG) and the input data port (IDP) within its digital applications interface (DAI), but omits S/PDIF hardware to reduce cost and silicon area.
How much on-chip memory does the ADSP-21375KSWZ-2B provide?
The ADSP-21375KSWZ-2B integrates 0.5 Mbit (64 kB) of on-chip SRAM and 2 Mbit (256 kB) of mask-programmable ROM, organized across four memory blocks (BLOCK 0–3) with independent PM/DM bus access. Memory can be allocated flexibly for code, data, or mixed use, and supports 16-/32-/48-/64-bit word accesses with single-cycle latency for both core and I/O processor.
Is the ADSP-21375KSWZ-2B pin-compatible with other SHARC processors?
The ADSP-21375KSWZ-2B shares the 208-lead LQFP_EP package and core pinout with the ADSP-21371KSWZ-2B, but functional pin assignments differ for peripherals absent in the ADSP-21375KSWZ-2B (e.g., S/PDIF, PWM). It is not pin-compatible with ADSP-21479KSWZ-2A (256-ball CSPBGA) or earlier ADSP-2136x series (144-LQFP). Board reuse requires verification of peripheral pin mappings against the ADSP-21375KSWZ-2B datasheet.
What security features are implemented in the ADSP-21375KSWZ-2B?
The ADSP-21375KSWZ-2B implements ROM-based security: it boots exclusively from internal mask-ROM and disables JTAG access unless a unique 64-bit key is scanned via TDI. This prevents unauthorized firmware readout and external code loading. Security is enabled at manufacturing; once activated, the device ignores incorrect keys and blocks emulation until the valid key is presented.
ADSP-21375KSWZ-2B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SHARC®
- Package/Case:
- 208-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Floating Point
- Interface:
- DAI, DPI
- Clock Rate:
- 266MHz
- Non-Volatile Memory:
- ROM (256kB)
- On-Chip RAM:
- 64kB
- Voltage - I/O:
- 3.30V
- Voltage - Core:
- 1.20V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-LQFP-EP (28x28)
ADSP-21375KSWZ-2B FAQ
1.How can I place an order for ADSP-21375KSWZ-2B through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-21375KSWZ-2B 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-21375KSWZ-2B reliable?
The price and inventory of ADSP-21375KSWZ-2B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-21375KSWZ-2B is usually 5 days.
3.What payment methods are accepted for ADSP-21375KSWZ-2B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-21375KSWZ-2B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-21375KSWZ-2B?
ADSP-21375KSWZ-2B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-21375KSWZ-2B 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-21375KSWZ-2B?
For technical support, including ADSP-21375KSWZ-2B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-21375KSWZ-2B requirements.
6.How does Aetrix verify that ADSP-21375KSWZ-2B is sourced from the original manufacturer or authorized distributors?
All ADSP-21375KSWZ-2B 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-21375KSWZ-2B meets industry standards.
7.What is the process for return or replacement of ADSP-21375KSWZ-2B?
All ADSP-21375KSWZ-2B units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-21375KSWZ-2B, 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-21375KSWZ-2B part is unused and in its original packaging.
Return procedure for ADSP-21375KSWZ-2B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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