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Analog Devices Inc. ADSP-2185NBSTZ-320
- Part No.:
- ADSP-2185NBSTZ-320
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185NBSTZ-320.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADSP-2185NBSTZ-320 from Analog Devices is a 16-bit fixed-point DSP microcomputer optimized for real-time signal processing in embedded audio, telecom, and industrial control systems. It delivers 80 MIPS sustained performance at 12.5 ns instruction cycle time (1.8 V core), features 16K words of on-chip program RAM and 16K words of data RAM, dual SPORTs with hardware companding, and supports full-memory or host-mode booting via byte DMA or internal DMA port.
For engineers reviewing the ADSP-2185NBSTZ-320 datasheet, ADSP-2185NBSTZ-320 pinout, ADSP-2185NBSTZ-320 application, or ADSP-2185NBSTZ-320 equivalent, key selection considerations include its 100-lead LQFP package, 1.8 V core supply with 3.3 V I/O tolerance, zero-overhead looping architecture, and ICE-Port™ debug interface compatibility for in-system validation.
Technical Context
The ADSP-2185NBSTZ-320 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two dedicated DAGs, and a zero-overhead program sequencer. Its 3-bus Harvard architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - in every instruction cycle.
It supports flexible system interfacing via 16-bit internal DMA port (IDMA), 8-bit byte DMA port (BDMA) for EPROM/ROM booting, programmable wait states, and dual serial ports with frame-synchronous operation, A-law/μ-law companding per CCITT G.711, and multichannel TDM support on SPORT0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit fixed-point ADSP-2100-compatible with ALU/MAC/shifter, dual DAGs, and zero-overhead loop sequencer |
| Performance | 80 MIPS sustained @ 12.5 ns instruction cycle (1.8 V core); single-cycle instruction and context switch |
| On-Chip Memory | 16K × 24-bit program RAM + 16K × 16-bit data RAM; dual-purpose program memory for instructions/data |
| Serial Interfaces | Two double-buffered SPORTs with hardware A-law/μ-law companding, frame sync, and multichannel TDM on SPORT0 |
| Power Management | Hardware/software power-down mode with 200 CLKIN-cycle wake-up; idle and slow-idle modes with programmable clock divisors (16/32/64/128) |
| I/O Voltage Support | Flexible 1.8 V / 2.5 V / 3.3 V operation; all inputs tolerate up to 3.6 V regardless of VDDIO setting |
| Package | 100-lead LQFP (14 mm × 14 mm, 0.5 mm pitch); RoHS-compliant, lead-free |
Pinout & Package
ADSP-2185NBSTZ-320 is housed in a 100-lead Low-Profile Quad Flat Package (LQFP) with 0.5 mm pitch, 14 mm × 14 mm body size, and exposed thermal pad. Pin functions are defined per Analog Devices ADSP-218xN Rev. A datasheet Section "LQFP Package Pinout" (Page 40).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Master clock input | Accepts external TTL clock or crystal oscillator input (half-instruction-rate frequency); required for all operational modes |
| PWD | Power-down control | Active-low hardware trigger for entering low-power dormant state; supports nonmaskable edge-sensitive interrupt |
| PWDACK | Power-down acknowledge | Open-drain output indicating processor has entered power-down; used for system-level power sequencing coordination |
| SPORT0 (DT0, DR0, TFS0, RFS0, SCLK0) | Synchronous serial interface 0 | Full-duplex TDM-capable port supporting 3–16 bit word lengths, frame sync, and hardware companding per G.711 |
| SPORT1 (DT1, DR1, TFS1, RFS1, SCLK1) | Synchronous serial interface 1 | Configurable as second serial port or reassignable to IRQ0/IRQ1/FI/FO for flexible interrupt signaling |
| IDMA[15:0], IAD[15:0] | Internal DMA port | 16-bit multiplexed address/data bus enabling transparent high-speed access to on-chip RAM in host mode |
| BDMA[7:0] | Byte DMA port | Bidirectional 8-bit interface for booting from byte-wide EPROM/ROM or transferring program overlays and data tables |
| PF0–PF7 | Programmable flag I/O | 13 total flag pins (8 bidirectional, 3 output-only, 2 shared with SPORT1); used for system signaling, status indication, or peripheral handshaking |
Key Features
| Feature | Design Value |
|---|---|
| Zero-overhead looping | Eliminates branch instruction overhead in repetitive code blocks using internal loop counters and stacks |
| Dual operand fetch per cycle | 3-bus architecture enables simultaneous instruction fetch + dual data operand access (PMD + DMD), accelerating FIR/IIR execution |
| Hardware companding | Integrated A-law and μ-law encoding/decoding per CCITT G.711 reduces CPU load in voice codec applications |
| ICE-Port™ emulation interface | Enables non-intrusive real-time debugging, breakpoint insertion, and memory inspection in final target systems |
| Boot flexibility | Supports automatic loading from byte memory (BDMA), host-controlled memory initialization (IDMA), or external memory execution |
Applications
| Voice Communications Terminal | Digital Audio Processing System |
|---|---|
Use Scenario: Real-time echo cancellation and DTMF detection in VoIP gateways or IP phones with limited external memory. IC Role / Device Role / Timing Role: Primary signal processor executing adaptive filtering algorithms and managing dual-channel audio streams via SPORT0/SPORT1. Use Value: On-chip 16K×24-bit program RAM and 16K×16-bit data RAM eliminate need for external SRAM in compact designs; hardware companding offloads 30% of CPU cycles otherwise spent on codec routines. | Use Scenario: Multi-band parametric equalization and dynamic range compression in portable professional audio mixers. IC Role / Device Role / Timing Role: Dedicated audio DSP handling sample-rate conversion, filter bank computation, and real-time effects rendering at 48 kHz. Use Value: 80 MIPS sustained throughput ensures deterministic latency under full load; dual SPORTs enable simultaneous input capture and output playback without DMA bottlenecks. |
| Industrial Motor Control Interface | Telecom Line Card Signal Processor |
Use Scenario: Closed-loop field-oriented control (FOC) for BLDC motors in factory automation equipment with analog sensor feedback. IC Role / Device Role / Timing Role: Real-time controller executing PWM generation, current loop regulation, and position estimation using ADC-triggered SPORT transfers. Use Value: Programmable 16-bit interval timer with prescaler provides precise 10–100 μs PWM update intervals; 13 programmable flag pins simplify GPIO-based encoder interface and fault signaling. | Use Scenario: Channelized T1/E1 line card performing CAS/CCS signaling, HDLC framing, and jitter buffering in access concentrators. IC Role / Device Role / Timing Role: Protocol-aware signal processor managing time-slot assignment, CRC calculation, and buffer management across 24/32 channels. Use Value: SPORT0's multichannel TDM mode directly handles 24-word or 32-word bitstreams; BDMA port enables seamless overlay loading of protocol stacks from flash without halting real-time processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSP microcomputer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2186NBSTZ-320 | 8K words program RAM + 8K words data RAM; identical architecture, timing, and pinout | Lower memory footprint suits simpler control loops or cost-sensitive designs where 16K×24-bit program space is unnecessary | Select when application code size remains under 8K words and BOM cost optimization is prioritized over future firmware scalability |
| ADSP-2188NBSTZ-320 | 48K words program RAM + 56K words data RAM; same LQFP package and instruction set | Supports larger algorithm implementations (e.g., multi-channel codecs, FFT-based spectral analysis) without external memory expansion | Choose when firmware complexity exceeds 16K words or when dual 32K-word circular buffers are required for streaming applications |
Compared with ADSP-2185NBSTZ-320, ADSP-2186NBSTZ-320 offers reduced on-chip memory for tighter cost constraints, while ADSP-2188NBSTZ-320 provides scalable memory headroom for evolving algorithmic requirements - all retain identical timing, I/O voltage support, and ICE-Port™ debug compatibility.
Availability
ADSP-2185NBSTZ-320 is available at Aetrix Electronics and suitable for voice communications terminals, digital audio processing systems, industrial motor control interfaces, and telecom line card signal processors requiring stable component supply and long-term design continuity.
Supply support for ADSP-2185NBSTZ-320 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, automotive, and communications markets.
The ADSP-218xN series was designed as a low-power, code-compatible evolution of the ADSP-2100 family, targeting cost-sensitive embedded DSP applications requiring integrated memory, flexible I/O, and robust debug infrastructure - exemplified by the ADSP-2185NBSTZ-320.
FAQ
What is the core supply voltage requirement for ADSP-2185NBSTZ-320?
The ADSP-2185NBSTZ-320 requires a 1.8 V ± 0.1 V core supply (VDDINT) for nominal 12.5 ns instruction cycle operation. Its I/O banks support 1.8 V, 2.5 V, or 3.3 V operation (VDDIO), and all inputs tolerate up to 3.6 V regardless of VDDIO setting - enabling direct interfacing with legacy 3.3 V peripherals without level shifters.
Does ADSP-2185NBSTZ-320 support crystal oscillator input?
Yes, ADSP-2185NBSTZ-320 integrates an on-chip oscillator circuit and supports parallel-resonant fundamental-frequency crystals connected between CLKIN and XTAL pins. External capacitors and a feedback resistor are required per Analog Devices' recommended layout; the crystal must stabilize within 4096 CLKIN cycles for reliable power-down recovery.
How does the ADSP-2185NBSTZ-320 handle booting from external memory?
ADSP-2185NBSTZ-320 supports three boot methods selected at reset via Mode C/D pins: (1) BDMA auto-load of first 32 program words from byte memory, (2) IDMA host-initiated memory initialization, or (3) direct execution from external memory. Boot mode determines whether the processor halts until memory is loaded or begins execution immediately.
Can ADSP-2185NBSTZ-320 operate in low-power modes without external hardware changes?
Yes, ADSP-2185NBSTZ-320 implements three software-controllable low-power modes: Power-Down (entered via PWD pin or software bit, 200-cycle wake-up), Idle (indefinite wait until interrupt), and Slow Idle (IDLE(n) with n=16/32/64/128 clock divisor). No external circuitry is needed beyond standard decoupling for any mode.
Is the ADSP-2185NBSTZ-320 pin-compatible with other ADSP-218xN devices?
Yes, all ADSP-218xN series members - including ADSP-2184N, ADSP-2185N, ADSP-2186N, ADSP-2187N, ADSP-2188N, and ADSP-2189N - are fully pin-compatible in both 100-lead LQFP and 144-ball BGA packages. Memory size differences do not affect pin function mapping, enabling drop-in replacement during design iteration or volume manufacturing.
ADSP-2185NBSTZ-320 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:
- 80MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 80kB
- Voltage - I/O:
- 1.8V, 2.5V, 3.3V
- Voltage - Core:
- 1.90V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185NBSTZ-320 FAQ
1.How can I place an order for ADSP-2185NBSTZ-320 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185NBSTZ-320 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-2185NBSTZ-320 reliable?
The price and inventory of ADSP-2185NBSTZ-320 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2185NBSTZ-320 is usually 5 days.
3.What payment methods are accepted for ADSP-2185NBSTZ-320?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185NBSTZ-320 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185NBSTZ-320?
ADSP-2185NBSTZ-320 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185NBSTZ-320 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-2185NBSTZ-320?
For technical support, including ADSP-2185NBSTZ-320 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185NBSTZ-320 requirements.
6.How does Aetrix verify that ADSP-2185NBSTZ-320 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185NBSTZ-320 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-2185NBSTZ-320 meets industry standards.
7.What is the process for return or replacement of ADSP-2185NBSTZ-320?
All ADSP-2185NBSTZ-320 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185NBSTZ-320, 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-2185NBSTZ-320 part is unused and in its original packaging.
Return procedure for ADSP-2185NBSTZ-320:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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