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Analog Devices Inc. ADSP-2185BSTZ-133
- Part No.:
- ADSP-2185BSTZ-133
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185BSTZ-133.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,992
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Product details
Overview
ADSP-2185BSTZ-133 from Analog Devices is a 33 MIPS fixed-point DSP microcomputer optimized for real-time signal processing in embedded audio, telecom, and industrial control systems. It integrates 16K × 24-bit on-chip program RAM, 16K × 16-bit on-chip data RAM, dual SPORTs with hardware companding, a 16-bit internal DMA port, and a programmable 16-bit interval timer - all in a 100-lead TQFP package operating at 30 ns instruction cycle time.
For engineers reviewing the ADSP-2185BSTZ-133 datasheet, ADSP-2185BSTZ-133 pinout, ADSP-2185BSTZ-133 application, or ADSP-2185BSTZ-133 equivalent, key selection criteria include on-chip memory configuration (32 KB total), dual serial port timing compatibility, host/full memory mode flexibility, low-power idle and power-down modes with 100-cycle wake-up, and ICE-Port™ debug interface support for in-system emulation.
Technical Context
The ADSP-2185BSTZ-133 implements the ADSP-2100 family base architecture with three independent computational units (ALU, MAC, shifter), two dedicated data address generators (DAGs), and a zero-overhead program sequencer supporting conditional jumps and subroutine calls in one cycle. Its 3-bus architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - within every instruction cycle.
It supports two configurable synchronous serial ports (SPORT0/SPORT1) with hardware A-law/µ-law companding per CCITT G.711, frame-synchronous or frameless operation, and optional reconfiguration of SPORT1 pins as IRQ0/IRQ1/Flag In/Flag Out. Memory interface modes include Full Memory Mode (14-bit address, 24-bit data) and Host Mode (16-bit IDMA bus + A0), selected via Mode C pin at reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 30 ns - enables 33 MIPS sustained throughput with single-cycle execution of all instructions including ALU, MAC, and shifter operations. |
| On-Chip Program Memory | 16K × 24-bit RAM - stores both instructions and data; allows dual-operand fetch per cycle when used for data overlay. |
| On-Chip Data Memory | 16K × 16-bit RAM - supports circular buffering and modulo addressing via two DAGs with four pointer registers each. |
| Serial Ports | Two double-buffered SPORTs - each supports 3–16-bit word length, internal/external clock, hardware companding, and independent transmit/receive framing. |
| Power-Down Recovery | 100 CLKIN cycles - hardware- or software-initiated dormant state with nonmaskable power-down interrupt and PWDACK signaling. |
| Timer Resolution | Programmable 16-bit counter with 8-bit prescaler (TSCALE) - generates periodic interrupts with user-defined period down to 1 processor cycle granularity. |
| Interrupt Sources | 11 total - 6 external (IRQ2, IRQL0/1, IRQE, IRQ0/1), 5 internal (timer, SPORTs, BDMA, power-down, software); fully maskable except power-down/reset. |
Pinout & Package
ADSP-2185BSTZ-133 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, RoHS-compliant, and thermally enhanced for embedded DSP applications requiring compact board layout and moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Processor Reset Input | Active-low asynchronous reset that initializes all registers, clears stacks, and forces boot sequence; sampled synchronously with internal clock. |
| CLKIN / XTAL | Clock Input / Crystal Terminal | Dual-function input accepting either TTL-compatible 16.67 MHz external clock or parallel-resonant crystal (fundamental mode) for internal oscillator. |
| SPORT0[4:0] | Synchronous Serial Port 0 I/O | Five-pin bidirectional interface supporting clock (SCLK0), frame sync (RFS0/TFS0), data transmit (DT0), and data receive (DR0). |
| SPORT1[4:0] | Synchronous Serial Port 1 I/O | Configurable as full SPORT or multiplexed to IRQ0/IRQ1/Flag In/Flag Out; retains serial functionality when flags are enabled. |
| PF0–PF7 | Programmable Flag I/O | Eight general-purpose I/O pins; PF0–PF2 also serve as Mode A/B/C select inputs during RESET; FL0–FL2 are dedicated output-only flags. |
| IDMA Port (IAD15:0, IWR, IRD, IAL, IS, IACK) | Host-Mode Internal DMA Interface | 16-bit multiplexed address/data bus with control signals enabling glueless connection to microcontrollers or FPGAs in Host Mode. |
| BDMA / Byte Memory Interface (A13:0, D23:0) | Byte-Wide External Memory Interface | Supports up to 4 MB byte-addressable ROM/RAM for program overlays and data tables; includes programmable wait-state generation. |
| EZ-Port[8:0] | ICE-Port™ Emulation Interface | 9-pin JTAG-compatible debug port enabling in-circuit emulation, breakpoint insertion, register/memory inspection, and C-level debugging without target board modification. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Cycle Context Switch | Enables deterministic real-time task switching with no pipeline flush or register save overhead - critical for multi-channel audio or telecom protocol stacks. |
| Dual Operand Fetch Architecture | 3-bus design permits simultaneous access to program memory (instruction or data) and data memory in one cycle - eliminates memory bottlenecks in FFT or FIR filter kernels. |
| Hardware Companding Support | Integrated A-law and µ-law encoding/decoding per CCITT G.711 - eliminates need for external codec in voice-band applications like VoIP gateways or PBX systems. |
| Zero-Overhead Looping | Hardware loop counters and stack eliminate branch instructions in repetitive code - reduces cycle count by ~15% in inner-loop DSP algorithms such as correlation or convolution. |
| Power-Down with 100-Cycle Wake-Up | Hardware-controlled low-power state with guaranteed sub-3 µs recovery (at 33 MHz) - extends battery life in portable medical or test equipment without sacrificing real-time responsiveness. |
| ICE-Port™ Debug Interface | On-chip emulation logic with 14-pin EZ-ICE®-compatible connector - enables full-speed debugging in final system layout without socket or probe interference. |
Applications
| Voice Communications Gateway | Digital Audio Processing System |
|---|---|
Use Scenario: Real-time voice compression/decompression and echo cancellation in IP-based telephony gateways handling multiple concurrent channels. IC Role / Device Role / Timing Role: Primary DSP engine executing G.723.1/G.729 codecs and adaptive filtering algorithms with deterministic latency under 10 ms. Use Value: On-chip 32 KB RAM eliminates external SRAM, reducing BOM cost and PCB area; dual SPORTs enable simultaneous TDM stream handling for up to 32 voice channels. |
Use Scenario: High-fidelity audio effects processing (reverb, equalization, dynamics control) in professional studio interfaces and active loudspeakers. IC Role / Device Role / Timing Role: Fixed-point signal processor managing sample-rate conversion, FIR/IIR filtering, and multi-band compression with 48 kHz/96 kHz real-time throughput. Use Value: Hardware companding and 30 ns instruction cycle ensure bit-accurate G.711 compliance; 16-bit internal DMA port simplifies connection to high-speed audio ADC/DAC controllers. |
| Industrial Motor Control Platform | Portable Test & Measurement Instrument |
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase AC induction motors in HVAC and pump drives with sensorless speed estimation. IC Role / Device Role / Timing Role: Real-time controller executing Clarke/Park transforms, PI current regulators, and space-vector PWM generation at 10–20 kHz switching frequency. Use Value: Dual DAGs with modulo addressing accelerate circular buffer management for current sampling; programmable timer provides precise PWM synchronization. |
Use Scenario: Battery-powered handheld oscilloscope or spectrum analyzer requiring fast Fourier transform (FFT) computation and waveform display rendering. IC Role / Device Role / Timing Role: Signal processing core performing 1024-point FFTs, digital filtering, and trigger detection while maintaining low standby power between measurements. Use Value: Power-down mode with 100-cycle wake-up enables <100 µA quiescent current; ICE-Port™ allows firmware updates and calibration in field-deployed units without disassembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-point DSP microcomputer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2189MSTZ-133 | Enhanced variant with 256K × 24-bit on-chip program memory and 256K × 16-bit data memory; same 100-TQFP package and pinout. | Targets larger algorithm footprints (e.g., multi-band acoustic echo cancellation or wideband speech coding) where ADSP-2185BSTZ-133's 32 KB RAM is insufficient. | Select ADSP-2189MSTZ-133 only if application requires >32 KB on-chip memory and supports higher cost; otherwise ADSP-2185BSTZ-133 offers optimal cost/performance for mid-complexity DSP tasks. |
| TMS320C549PGE | TI C54x-series 100-MIPS DSP in 144-pin LQFP; lacks integrated companding hardware and ICE-Port™, but offers higher clock rate and larger memory map. | Used in legacy telecom infrastructure where TI toolchain familiarity and higher throughput outweigh need for analog-front-end integration. | Choose TMS320C549PGE only when migrating existing C54x codebase or requiring >33 MIPS; ADSP-2185BSTZ-133 provides superior integration for new designs targeting compact, low-power, mixed-signal edge nodes. |
Compared with ADSP-2185BSTZ-133, the ADSP-2189MSTZ-133 delivers scalable on-chip memory for complex algorithms but at higher unit cost and power, while the TMS320C549PGE offers raw speed and ecosystem maturity at the expense of analog interface integration and debug simplicity - making ADSP-2185BSTZ-133 the balanced choice for cost-sensitive, power-constrained, and rapidly prototyped DSP systems.
Availability
ADSP-2185BSTZ-133 is available at Aetrix Electronics and suitable for voice communications gateways, digital audio processing systems, industrial motor control platforms, and portable test & measurement instruments requiring stable component supply across extended production lifecycles.
Supply support for ADSP-2185BSTZ-133 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 digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADSP-2185BSTZ-133 belongs to the ADSP-2100 family of fixed-point DSP microcomputers designed specifically for real-time embedded signal processing in resource-constrained environments where on-chip memory, low-power operation, and debug accessibility are critical.
FAQ
What clock source options does the ADSP-2185BSTZ-133 support?
The ADSP-2185BSTZ-133 accepts either a 16.67 MHz TTL-compatible external clock applied to CLKIN (with XTAL left unconnected), or a parallel-resonant fundamental-mode crystal connected across CLKIN and XTAL pins. The internal oscillator automatically configures for crystal startup, including a 4096-cycle stabilization wait. Both options yield a 30 ns instruction cycle time and 33 MIPS performance. No other clock frequencies or configurations are supported per the ADSP-2185BSTZ-133 datasheet.
Does the ADSP-2185BSTZ-133 support pin-compatible upgrades to higher-memory variants?
Yes - the ADSP-2185BSTZ-133 shares identical 100-lead TQFP packaging, pinout, and electrical interface with the ADSP-2189MSTZ-133. All signal names, voltage levels, timing parameters, and memory interface modes match exactly. This allows direct PCB replacement without layout changes, provided the target application fits within the ADSP-2185BSTZ-133's 32 KB on-chip RAM footprint and does not require the ADSP-2189MSTZ-133's extended memory map.
How does the ADSP-2185BSTZ-133 handle power management in battery-operated devices?
The ADSP-2185BSTZ-133 implements three low-power states: Idle (CPU halted, peripherals active), Slow Idle (internal clock divided by 16/32/64/128), and Power-Down (core disabled, 100-cycle wake-up). Power-down is triggered via PWD pin or software bit, with PWDACK confirming entry. These modes reduce active current to <10 mA and standby current to <100 µA, enabling multi-day operation in portable medical monitors or handheld analyzers using the ADSP-2185BSTZ-133.
Can the ADSP-2185BSTZ-133 execute code directly from external memory?
No - the ADSP-2185BSTZ-133 requires boot code to be loaded into its on-chip program RAM before execution. It supports automatic booting from byte-wide external memory (e.g., EPROM) via the BDMA port or from an external host through the IDMA port in Host Mode. Once booted, all instructions execute from the 16K × 24-bit on-chip program RAM; external memory serves only for data tables, overlays, or storage - not direct execution - per the ADSP-2185BSTZ-133 architecture specification.
What debug capabilities does the ADSP-2185BSTZ-133 provide for production firmware validation?
The ADSP-2185BSTZ-133 integrates ICE-Port™ - a 14-pin on-chip emulation interface compatible with Analog Devices' EZ-ICE® hardware. It enables full-speed in-system debugging, including up to 20 breakpoints, register/memory read/write, PC upload/download, instruction-level emulation, and C-source-level debugging - all without removing the ADSP-2185BSTZ-133 from the target board or modifying the final PCB layout. This ensures robust firmware validation in production-representative environments.
ADSP-2185BSTZ-133 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:
- 33.3MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 80kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185BSTZ-133 FAQ
1.How can I place an order for ADSP-2185BSTZ-133 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185BSTZ-133 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-2185BSTZ-133 reliable?
The price and inventory of ADSP-2185BSTZ-133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2185BSTZ-133 is usually 5 days.
3.What payment methods are accepted for ADSP-2185BSTZ-133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185BSTZ-133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185BSTZ-133?
ADSP-2185BSTZ-133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185BSTZ-133 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-2185BSTZ-133?
For technical support, including ADSP-2185BSTZ-133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185BSTZ-133 requirements.
6.How does Aetrix verify that ADSP-2185BSTZ-133 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185BSTZ-133 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-2185BSTZ-133 meets industry standards.
7.What is the process for return or replacement of ADSP-2185BSTZ-133?
All ADSP-2185BSTZ-133 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185BSTZ-133, 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-2185BSTZ-133 part is unused and in its original packaging.
Return procedure for ADSP-2185BSTZ-133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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