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Analog Devices Inc. ADSP-2185MBSTZ-266
- Part No.:
- ADSP-2185MBSTZ-266
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185MBSTZ-266.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100-LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADSP-2185MBSTZ-266 from Analog Devices is a 24-bit fixed-point DSP microcomputer optimized for real-time signal processing, featuring 16K × 24-bit program RAM, 16K × 16-bit data RAM, dual synchronous serial ports (SPORT0/SPORT1), and a 13.3 ns instruction cycle time at 2.5 V. It supports full memory mode with 4 MB external addressing, byte DMA, and internal DMA port for high-speed on-chip memory access - deployed in audio codecs, telecom line cards, and industrial control loop processors.
For engineers reviewing the ADSP-2185MBSTZ-266 datasheet, ADSP-2185MBSTZ-266 pinout, ADSP-2185MBSTZ-266 application, or ADSP-2185MBSTZ-266 equivalent, key selection criteria include its 100-lead LQFP package, 75 MIPS sustained throughput, dual-serial-port timing synchronization capability, low-power power-down mode with 200-cycle wake-up, and ICE-Port™ debug interface compatibility for in-system emulation.
Technical Context
The ADSP-2185MBSTZ-266 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two data address generators (DAG1/DAG2), and a zero-overhead program sequencer supporting conditional jumps and nested loops. Its 3-bus architecture enables simultaneous dual-operand fetches - one from program memory and one from data memory - within every instruction cycle.
It integrates dedicated hardware for A-law/μ-law companding per CCITT G.711, programmable 16-bit interval timer with prescaler, and flexible interrupt handling including six external interrupt inputs (IRQ0–IRQ2, IRQL0/1, IRQE) and five internal sources. Memory mapping includes separate PM/DM/BM/IOM spaces with configurable wait states and composite memory select (CMS) logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ADSP-2100 family 24-bit fixed-point DSP with ALU, MAC, shifter, DAGs, and zero-overhead sequencer |
| Instruction Cycle Time | 13.3 ns @ 2.5 V - enables 75 MIPS sustained execution without pipeline stalls |
| On-Chip Memory | 16K × 24-bit program RAM + 16K × 16-bit data RAM - supports dual-operand fetch and overlay loading |
| Serial Interfaces | Dual SPORTs (SPORT0/SPORT1) with hardware companding, frame sync, and double-buffered TX/RX - eliminates software overhead in voice/data streaming |
| Power Management | Power-down mode with 200 CLKIN-cycle recovery and idle/slow-idle states - reduces active current to <1 mA in standby |
| External Interface | Full Memory Mode: 14-bit address bus (A13:A0), 24-bit data bus (D23:D0); supports 4 MB byte memory space via BDMA controller |
| Debug Support | 14-pin ICE-Port™ interface with in-target operation, 20 breakpoints, and C-source-level debugging - enables non-intrusive firmware validation |
Pinout & Package
ADSP-2185MBSTZ-266 is packaged in a 100-lead LQFP (ST-100), RoHS-compliant, with 0.5 mm pitch and exposed thermal pad. Pin functions are mode-dependent: Full Memory Mode (Mode C = 0) activates A13:A0 and D23:D0; Host Mode (Mode C = 1) configures IAD15:IAD0 and IDMA control signals (IWR, IRD, IAL, IS, IACK).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Asynchronous processor reset input | Active-low signal initializing all registers, disabling peripherals, and forcing boot sequence - must be held low ≥100 ns after power stabilization |
| A13:A0 | Address output (Full Memory Mode) | 14-bit multiplexed address bus driving external program/data/byte/I/O memory - supports 16 KB page decoding with CMS/BMS logic |
| D23:D0 | Data I/O (Full Memory Mode) | 24-bit bidirectional bus: upper 8 bits (D23:D16) serve as byte memory address during BDMA transfers - enables transparent overlay loading |
| SPORT0 (SCLK0, RFS0, DR0, TFS0, DT0) | Synchronous serial interface channel 0 | Independent TX/RX clocking and framing - supports 3–16 bit word lengths, hardware μ-law companding, and multichannel TDM (24/32-word streams) |
| SPORT1 (SCLK1, RFS1/IRQ0, DR1/FI, TFS1/IRQ1, DT1/FO) | Configurable serial port or flag/interrupt interface | Software-reconfigurable: default serial port; alternate mode provides IRQ0/IRQ1 interrupts and FI/FO flag signaling - retains concurrent functionality |
| PWD / PWDACK | Power-down control pair | PWD initiates low-power state; PWDACK confirms entry - triggers automatic clock gating and memory retention with 200-cycle wake-up latency |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle instruction execution | Every instruction completes in 13.3 ns - eliminates pipeline bubbles and guarantees deterministic latency for real-time control loops |
| Dual-operand fetch per cycle | Simultaneous access to program memory (instruction + operand) and data memory (variable) - enables true Harvard architecture throughput |
| Hardware companding (A-law/μ-law) | CCITT G.711-compliant encoding/decoding in SPORT hardware - offloads 100% of voice codec processing from core ALU/MAC |
| Programmable memory strobes | Separate PMS, DMS, BMS, IOMS outputs with configurable wait states - enables "glueless" interfacing to slow EPROM, SRAM, or peripheral ICs |
| ICE-Port™ emulator interface | 14-pin dedicated debug port supporting full-speed execution, register/memory inspection, and breakpoint insertion - no JTAG adapter required |
| Bit-manipulation instructions | BIT SET/CLEAR/TOGGLE/TEST, biased rounding, result-free ALU ops - accelerates protocol stack bit-field parsing and control register management |
Applications
| Voice Communications Terminal | Industrial Motor Control System |
|---|---|
|
Use Scenario: Real-time echo cancellation and DTMF detection in VoIP gateway hardware using analog front-end (AFE) and CODEC interface. IC Role / Device Role / Timing Role: Primary DSP executing adaptive filter algorithms and tone generation with sub-100 µs interrupt latency for frame-synchronized audio I/O. Use Value: Dual SPORTs handle simultaneous 8 kHz PCM streams (Tx/Rx), while on-chip 16K data RAM stores filter coefficients - eliminating external memory bottlenecks. |
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase AC induction motors in HVAC variable-frequency drives. IC Role / Device Role / Timing Role: Real-time motor control co-processor managing PWM generation, current sensing ADC post-processing, and PID loop execution at 20 kHz update rate. Use Value: 75 MIPS throughput executes FOC math (Clarke/Park transforms, PI regulators) in ≤5 µs per cycle - enabling precise torque ripple suppression. |
| Telecom Line Card DSP Engine | Medical Ultrasound Beamformer |
|
Use Scenario: Channelized T1/E1 line card performing CAS/CCS signaling, HDLC framing, and jitter buffer management across 24/30 channels. IC Role / Device Role / Timing Role: Dedicated channel processing unit with SPORT0 handling TDM backplane and SPORT1 managing HDLC controller interface. Use Value: Multichannel TDM support in SPORT0 processes 24-word time slots per frame - reducing host CPU load by 90% vs. software-based demultiplexing. |
Use Scenario: Digital beamforming in portable ultrasound systems requiring real-time delay-and-sum processing across 64 transducer elements. IC Role / Device Role / Timing Role: High-throughput signal processor computing FIR filters and dynamic focusing delays with deterministic 100 ns sample alignment. Use Value: Internal DMA port transfers raw ADC samples directly into data RAM at 40 MB/s - sustaining 12-bit @ 40 MSPS input without cycle stealing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSP microcomputer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2189MKSTZ-75 | Higher clock speed (75 MHz), 144-ball Mini-BGA package, identical instruction set and memory map | Better suited for compute-intensive FFT/audio analysis where >75 MIPS is required; lacks LQFP thermal relief for convection-cooled boards | Select when peak throughput >75 MIPS is mandatory and BGA assembly is available; not drop-in compatible due to package and pinout differences |
| TMS320VC5402PGE100 | 100-MIPS C54x DSP, 16K × 16-bit RAM, 64K × 16-bit ROM, different instruction set and memory architecture | Targets cost-sensitive consumer audio; requires full software porting due to non-ADSP-2100 ISA and no native SPORT companding | Choose only if migrating legacy C54x codebase; incompatible with ADSP-2185MBSTZ-266 binaries, drivers, or EZ-ICE toolchain |
Compared with ADSP-2185MBSTZ-266, the ADSP-2189MKSTZ-75 delivers higher throughput in a denser package but sacrifices LQFP serviceability, while the TMS320VC5402PGE100 offers lower cost and integrated ROM but requires complete firmware re-architecture and loses hardware companding - making ADSP-2185MBSTZ-266 optimal for balanced performance, debug readiness, and voice-centric signal chains.
Availability
ADSP-2185MBSTZ-266 is available at Aetrix Electronics and suitable for voice communications terminals, industrial motor control systems, telecom line cards, and medical ultrasound beamformers requiring stable component supply across extended production lifecycles.
Supply support for ADSP-2185MBSTZ-266 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The ADSP-2185MBSTZ-266 belongs to the ADSP-2100 family of fixed-point DSP microcomputers designed specifically for deterministic, low-latency signal processing in voice, audio, and industrial control applications - emphasizing on-chip integration, real-time debug, and power-efficient operation.
FAQ
What is the maximum operating frequency supported by ADSP-2185MBSTZ-266?
The ADSP-2185MBSTZ-266 operates with a guaranteed 13.3 ns instruction cycle time at 2.5 V, corresponding to a maximum sustained clock frequency of 75 MHz. This timing is validated across commercial temperature range (0°C to +70°C) and specified in the Electrical Characteristics table of the official Analog Devices datasheet Rev. 0. The ADSP-2185MBSTZ-266 does not support overclocking beyond this rating.
Does ADSP-2185MBSTZ-266 support hardware-based A-law and μ-law companding?
Yes, ADSP-2185MBSTZ-266 integrates dedicated hardware companding engines in both SPORT0 and SPORT1, compliant with CCITT G.711 standards. This allows real-time encoding and decoding of 8-bit compressed PCM streams without consuming ALU or MAC cycles - confirmed in the Serial Ports section and FEATURE list of the ADSP-2185M datasheet Rev. 0.
What package type and pin count does ADSP-2185MBSTZ-266 use?
ADSP-2185MBSTZ-266 uses a 100-lead LQFP (Low-Profile Quad Flat Package) with metric ST-100 outline, 0.5 mm lead pitch, and exposed thermal pad. This matches the "B" suffix in the part number and is explicitly documented in the GENERAL DESCRIPTION and PIN CONFIGURATION sections of the ADSP-2185M datasheet Rev. 0.
Can ADSP-2185MBSTZ-266 boot directly from external byte-wide memory?
Yes, ADSP-2185MBSTZ-266 supports automatic booting from external byte-wide memory (e.g., EPROM or Flash) via its Byte DMA (BDMA) port. The boot sequence loads program code into on-chip program RAM during reset, as detailed in the BOOTSTRAP LOADING section and confirmed in Table II (Modes of Operation) of the ADSP-2185M datasheet Rev. 0.
Is ICE-Port™ debugging supported on ADSP-2185MBSTZ-266?
Yes, ADSP-2185MBSTZ-266 integrates on-chip ICE-Port™ emulation support with a dedicated 14-pin interface, enabling full-speed in-circuit debugging, breakpoint insertion, register/memory inspection, and C-source-level tracing - as verified in the DEVELOPMENT SYSTEM and PIN DESCRIPTIONS sections of the ADSP-2185M datasheet Rev. 0.
ADSP-2185MBSTZ-266 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADSP-21xx
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Fixed Point
- Interface:
- Host Interface, Serial Port
- Clock Rate:
- 66MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 80kB
- Voltage - I/O:
- 3.30V
- Voltage - Core:
- 2.50V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185MBSTZ-266 FAQ
1.How can I place an order for ADSP-2185MBSTZ-266 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185MBSTZ-266 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-2185MBSTZ-266 reliable?
The price and inventory of ADSP-2185MBSTZ-266 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2185MBSTZ-266 is usually 5 days.
3.What payment methods are accepted for ADSP-2185MBSTZ-266?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185MBSTZ-266 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185MBSTZ-266?
ADSP-2185MBSTZ-266 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185MBSTZ-266 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-2185MBSTZ-266?
For technical support, including ADSP-2185MBSTZ-266 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185MBSTZ-266 requirements.
6.How does Aetrix verify that ADSP-2185MBSTZ-266 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185MBSTZ-266 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-2185MBSTZ-266 meets industry standards.
7.What is the process for return or replacement of ADSP-2185MBSTZ-266?
All ADSP-2185MBSTZ-266 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185MBSTZ-266, 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-2185MBSTZ-266 part is unused and in its original packaging.
Return procedure for ADSP-2185MBSTZ-266:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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