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Analog Devices Inc. ADSP-21261SKSTZ150
- Part No.:
- ADSP-21261SKSTZ150
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 144-LQFP
- Datasheet:
-
ADSP-21261SKSTZ150.pdf
- Description:
- IC DSP 32BIT 150MHZ 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,856
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Product details
Overview
ADSP-21261SKSTZ150 from Analog Devices is a 32-bit/40-bit floating-point SHARC DSP optimized for high-performance audio processing, operating at 150 MHz core instruction rate, featuring dual computational units (PEX/PEY), 1 Mbit on-chip SRAM, and 3 Mbit mask-programmable ROM with integrated multichannel audio decoder support including Dolby Digital and DTS.
For engineers reviewing the ADSP-21261SKSTZ150 datasheet, ADSP-21261SKSTZ150 pinout, ADSP-21261SKSTZ150 application, or ADSP-21261SKSTZ150 equivalent, key selection considerations include SIMD-mode audio algorithm throughput, ROM-based decoder availability, 136-ball BGA package compatibility, and JTAG-emulation-ready debug infrastructure.
Technical Context
The ADSP-21261SKSTZ150 implements a dual-processing-element SIMD architecture where PEX executes all instructions and PEY activates via MODE1.PEYEN to enable parallel data operations-supporting IEEE 32-bit single-precision, 40-bit extended-precision floating-point, and 32-bit fixed-point arithmetic in single-cycle ALU/multiplier/shifter units.
Its digital application interface (DAI) integrates two precision clock generators (PCGs), an input data port (IDP) configurable as eight I²S channels or one 20-bit synchronous parallel acquisition port, six serial ports (four active on ADSP-21261), and a flexible signal routing unit (SRU) enabling software-defined peripheral interconnect without hardware redesign.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Instruction Rate | 150 MHz - delivers 900 MFLOPS peak performance for real-time audio algorithms |
| On-Chip SRAM | 1 Mbit dual-ported - supports simultaneous core and I/O processor access for zero-wait-state buffering |
| On-Chip ROM | 3 Mbit mask-programmable - stores boot code and precompiled audio decoders (e.g., Dolby Pro Logic II, DTS Neo:6) |
| Serial Ports (SPORTs) | 4 full-duplex - enables up to 16 audio channels via TDM/I²S modes with dedicated DMA per channel |
| Digital Application Interface | Includes IDP, PCGs, SRU, and 6 flag I/O - allows dynamic reconfiguration of audio data paths without external logic |
| Power Supplies | VDDINT/AVDD = 1.2 V, VDDEXT = 3.3 V - requires separate analog filtering on AVDD to stabilize PLL clock generation |
| JTAG Support | IEEE 1149.1 compliant - enables full-speed emulation, register inspection, and non-intrusive debugging |
Pinout & Package
The ADSP-21261SKSTZ150 uses a 136-ball fine-pitch BGA (BC-136-1) package with 0.8 mm ball pitch, designed for high-density PCB layouts and thermal management in audio processing modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | External Clock Input | Accepts 12.5–50 MHz crystal or oscillator reference for PLL-based internal clock generation |
| RESET | Asynchronous Reset Input | Active-low signal that initializes core registers, memory controllers, and peripherals on power-up or fault recovery |
| BOOT_CFG[1:0] | Boot Configuration Pins | Selects boot source: parallel port EPROM, SPI master/slave, or internal ROM execution at power-on |
| DAI_Px (x=0–19) | Digital Application Interface Pins | Configurable I/O for IDP, PCG outputs, flag signals, or timer I/O under SRU software control |
| SPORT0–SPORT3 | Synchronous Serial Port I/O | Each provides Tx/Rx data, clock, and frame sync lines supporting I²S, left-justified, or TDM protocols |
| TCK/TMS/TDO/TDI | JTAG Test Access Port | Enables boundary-scan testing, real-time debugging, and flash programming via standard IEEE 1149.1 interface |
Key Features
| Feature | Design Value |
|---|---|
| SIMD Computational Architecture | Two independent processing elements (PEX/PEY) executing identical instructions on different data streams-enabling 2× throughput for FIR, FFT, and matrix operations |
| On-Chip Memory Architecture | Dual-ported SRAM/ROM blocks with PM/DM buses allow concurrent instruction fetch, data read, and DMA transfer in single cycle |
| Digital Application Interface (DAI) | Software-reconfigurable signal routing via SRU matrix eliminates need for external glue logic when connecting codecs, ADCs, or DACs |
| ROM-Based Security | 64-bit JTAG key authentication prevents unauthorized code extraction and disables external boot modes unless correct key is scanned |
| Phase-Locked Loop (PLL) | Programmable numerator (1–64) and divisor (2/4/8/16) enable precise internal clock synthesis from low-frequency external references |
Applications
| Home Theater AV Receivers | Professional Audio Mixing Consoles |
|---|---|
Use Scenario: Real-time decoding and post-processing of multichannel audio streams (Dolby Digital, DTS, AAC) in consumer AV receivers. IC Role / Device Role / Timing Role: Primary audio DSP executing ROM-resident decoders and user-configurable equalization/fx algorithms with deterministic latency. Use Value: Eliminates need for external decoder ICs and reduces BOM cost while maintaining compliance with Dolby/DTS certification requirements. | Use Scenario: Low-latency mixing, dynamics processing, and effects rendering across 32+ input channels in live sound consoles. IC Role / Device Role / Timing Role: Core signal processor handling sample-accurate routing, parametric EQ, compression, and reverb using SIMD-accelerated filter banks. Use Value: Achieves sub-500 µs round-trip latency at 96 kHz sampling with sustained 900 MFLOPS compute headroom for complex plugin chains. |
| Automotive Infotainment Systems | Digital Studio Audio Interfaces |
Use Scenario: Integration of surround sound decoding, noise cancellation, and voice enhancement in automotive head units. IC Role / Device Role / Timing Role: Audio subsystem controller managing multiple SPDIF/I²S sources, CAN bus metadata, and amplifier feedback loops. Use Value: Enables seamless switching between navigation prompts, phone calls, and media playback without audio dropouts or resynchronization delays. | Use Scenario: High-fidelity USB-to-AES/EBU conversion with real-time sample rate conversion and jitter reduction. IC Role / Device Role / Timing Role: Precision clock domain translator synchronizing asynchronous USB audio streams to studio-grade AES3 timing standards. Use Value: Maintains ±1 ppm clock accuracy across temperature using PCG-generated low-jitter master clocks derived from internal PLL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-21262SKSTZ200 | 200 MHz core, 2 Mbit SRAM, 4 Mbit ROM, 6 SPORTs | Supports higher channel count and more complex decoder combinations (e.g., WMA PRO 7.1) | Select when >900 MFLOPS or additional ROM-based algorithms are required |
| ADSP-21369BBCZ-2 | 266 MHz core, 5 Mbit L1 SRAM, enhanced DAI, no ROM | Requires external boot and algorithm loading; targets custom firmware development over preloaded codecs | Select for maximum flexibility in algorithm updates and non-standard audio formats |
Compared with ADSP-21261SKSTZ150, the ADSP-21262SKSTZ200 offers higher throughput and expanded ROM decoder support but shares identical 136-ball BGA footprint and software compatibility; the ADSP-21369BBCZ-2 provides greater raw performance and memory bandwidth but requires full firmware deployment and lacks factory-programmed audio decoders.
Availability
ADSP-21261SKSTZ150 is available at Aetrix Electronics and suitable for home theater receivers, professional audio mixers, and automotive infotainment systems requiring stable component supply, long-term lifecycle assurance, and qualified industrial-grade packaging.
Supply support for ADSP-21261SKSTZ150 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, communications, and industrial applications.
The ADSP-21261SKSTZ150 belongs to the SHARC® family of SIMD-capable audio DSPs, engineered specifically for cost-sensitive, high-fidelity multichannel audio systems requiring integrated decoder support and deterministic real-time processing.
FAQ
What is the maximum supported serial port data rate for ADSP-21261SKSTZ150?
The ADSP-21261SKSTZ150 serial ports operate at up to one-quarter of the core clock rate. At its rated 150 MHz instruction rate, each SPORT supports a maximum data rate of 37.5 Mbits/sec. This enables full-duplex transmission of up to 128-channel TDM frames or four stereo I²S streams per port, with dedicated DMA channels ensuring zero-CPU-overhead transfers.
Does ADSP-21261SKSTZ150 include factory-programmed audio decoders in ROM?
Yes, the ADSP-21261SKSTZ150 includes 3 Mbit of mask-programmable ROM containing certified audio decoders such as Dolby Digital, Dolby Pro Logic II, DTS Neo:6, and MPEG2 BC 2ch. Unlike later variants (e.g., ADSP-21266), it does not include WMA PRO 7.1 or AAC coefficients-decoder availability is confirmed in Table 3 of the Rev. G datasheet.
What package type and ball pitch does ADSP-21261SKSTZ150 use?
The ADSP-21261SKSTZ150 uses a 136-ball fine-pitch BGA package designated BC-136-1 with 0.8 mm ball pitch. This package matches the mechanical footprint of ADSP-21266 variants and is compatible with standard SMT reflow profiles for lead-free assembly, as specified in Analog Devices' Surface-Mount Design guidelines.
Can ADSP-21261SKSTZ150 execute code from external memory?
No-when ROM-based security is enabled (default configuration), the ADSP-21261SKSTZ150 boots exclusively from internal SRAM/ROM and disables external boot modes and JTAG access until a valid 64-bit key is scanned. External memory execution is only possible if security is disabled during manufacturing, which voids decoder certification and is not supported in production audio systems.
How many DMA channels are available on ADSP-21261SKSTZ150?
The ADSP-21261SKSTZ150 provides 18 dedicated DMA channels: 1 for SPI, 8 for the input data port (IDP), and 9 distributed across its four serial ports (SPORT0–SPORT3). Each channel operates independently with configurable priority, chaining, and interrupt-on-complete capability-enabling concurrent audio stream ingestion, processing, and output without CPU intervention.
ADSP-21261SKSTZ150 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SHARC®
- Package/Case:
- 144-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Floating Point
- Interface:
- DAI, SPI
- Clock Rate:
- 150MHz
- Non-Volatile Memory:
- ROM (384kB)
- On-Chip RAM:
- 128kB
- 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:
- 144-LQFP (20x20)
ADSP-21261SKSTZ150 FAQ
1.How can I place an order for ADSP-21261SKSTZ150 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-21261SKSTZ150 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-21261SKSTZ150 reliable?
The price and inventory of ADSP-21261SKSTZ150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-21261SKSTZ150 is usually 5 days.
3.What payment methods are accepted for ADSP-21261SKSTZ150?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-21261SKSTZ150 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-21261SKSTZ150?
ADSP-21261SKSTZ150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-21261SKSTZ150 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-21261SKSTZ150?
For technical support, including ADSP-21261SKSTZ150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-21261SKSTZ150 requirements.
6.How does Aetrix verify that ADSP-21261SKSTZ150 is sourced from the original manufacturer or authorized distributors?
All ADSP-21261SKSTZ150 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-21261SKSTZ150 meets industry standards.
7.What is the process for return or replacement of ADSP-21261SKSTZ150?
All ADSP-21261SKSTZ150 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-21261SKSTZ150, 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-21261SKSTZ150 part is unused and in its original packaging.
Return procedure for ADSP-21261SKSTZ150:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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