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Analog Devices Inc. ADSP-2185NKSTZ-320
- Part No.:
- ADSP-2185NKSTZ-320
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185NKSTZ-320.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
ADSP-2185NKSTZ-320 from Analog Devices is a 16-bit fixed-point DSP microcomputer with 16K words (24-bit) on-chip program RAM, 16K words (16-bit) data RAM, 12.5 ns instruction cycle time at 1.8 V, and dual serial ports (SPORT0/SPORT1) supporting A-law/μ-law companding per CCITT G.711 - used in real-time audio codecs and telecom endpoint signal processing.
For engineers reviewing the ADSP-2185NKSTZ-320 datasheet, ADSP-2185NKSTZ-320 pinout, ADSP-2185NKSTZ-320 application, or ADSP-2185NKSTZ-320 equivalent, key selection criteria include on-chip memory configuration, 100-lead LQFP package compatibility, 80 MIPS sustained performance, low-power idle/slow-idle/power-down modes, and ICE-Port™ debug interface support in final systems.
Technical Context
The ADSP-2185NKSTZ-320 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two dedicated DAGs for simultaneous dual-operand fetches, and a zero-overhead program sequencer enabling looped code execution without explicit jump instructions. Its 3-bus architecture supports concurrent instruction fetch, operand load, and result writeback.
It integrates flexible I/O supporting 1.8 V/2.5 V/3.3 V operation, 16-bit internal DMA port for high-speed on-chip memory access, byte DMA port addressing up to 4 MB external memory, and programmable wait-state generation for glueless interfacing with slow peripherals or EPROM boot sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 12.5 ns @ 1.8 V core - enables 80 MIPS sustained throughput for real-time FIR/IIR filtering. |
| On-Chip Program Memory | 16K words × 24-bit SRAM - stores both instructions and data, allowing dual-operand fetch per cycle. |
| On-Chip Data Memory | 16K words × 16-bit SRAM - supports circular buffering and fast coefficient/data access for audio algorithms. |
| Serial Ports | Two double-buffered SPORTs with hardware companding - eliminates external codec ICs in voice-band applications. |
| Power Modes | Power-down (200 CLKIN recovery), Idle, Slow Idle (IDLE(n) with n=16/32/64/128) - reduces active current to <1 mA in standby. |
| Package | 100-lead LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and thermal management. |
| External Interface | 16-bit internal DMA port + 8-bit byte DMA port - enables transparent off-chip program overlays and data table loading without CPU intervention. |
Pinout & Package
ADSP-2185NKSTZ-320 is housed in a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with 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 40 MHz TTL-compatible signal or crystal oscillator input; drives internal 80 MHz instruction clock. |
| PWD | Power-down control | Active-low hardware entry into ultra-low-power mode; recoverable in ≤200 CLKIN cycles. |
| SPORT0 DT0/DR0 | Serial data transmit/receive | Full-duplex synchronous interface with frame sync (TFS0/RFS0) and serial clock (SCLK0); supports μ-law/A-law. |
| SPORT1 DT1/DR1 | Secondary serial interface | Configurable as serial port or dual external interrupt (IRQ0/IRQ1) + flag I/O (FI/FO). |
| PF0–PF7 | Programmable flag I/O | 13 total flags (8 bidirectional, 3 output-only); used for system signaling, handshaking, or interrupt extension. |
| IDMA[15:0] | Internal DMA data/address bus | Multiplexed 16-bit bus for host-controlled direct access to on-chip RAM; supports burst transfers. |
| BDMA[7:0] | Byte DMA data bus | Bidirectional 8-bit interface to external EPROM/Flash; loads first 32 program words automatically during boot. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle instruction execution | Every instruction completes in one 12.5 ns cycle - guarantees deterministic latency for real-time control loops. |
| Dual serial ports with hardware companding | Eliminates need for external codec ICs in telephony endpoints compliant with G.711 standard. |
| Zero-overhead looping | Hardware loop counters and stacks enable infinite loop execution without branch penalty or CPU overhead. |
| Flexible boot options | Automatic loading from byte-wide EPROM via BDMA or host-initiated IDMA load - supports field-upgradable firmware. |
| ICE-Port™ emulator interface | Enables non-intrusive debugging, breakpoint insertion, and memory inspection in powered, operational systems. |
Applications
| Voice Band Telephony Endpoint | Digital Audio Processing Module |
|---|---|
Use Scenario: Embedded VoIP gateway handling analog-to-digital conversion, echo cancellation, and packetization of voice streams. IC Role / Device Role / Timing Role: Primary signal processor executing G.711 companding, adaptive filtering, and jitter buffer management in real time. Use Value: On-chip 16K×24-bit program RAM stores full codec algorithm; dual SPORTs interface directly to line interface units (LIUs) without glue logic. | Use Scenario: Standalone audio effects unit performing real-time equalization, reverb, and dynamic range compression on stereo inputs. IC Role / Device Role / Timing Role: Fixed-point DSP engine managing multi-stage filter banks and coefficient updates at 48 kHz sample rate. Use Value: 16K×16-bit data RAM enables large circular buffers for delay lines; shifter/MAC units execute 16-bit×16-bit multiply-accumulate in single cycle. |
| Industrial Motor Control Interface | Secure Firmware Boot Controller |
Use Scenario: Field-oriented control (FOC) module sampling current/voltage sensors and generating PWM timing signals for 3-phase inverters. IC Role / Device Role / Timing Role: Real-time computation node executing Clarke/Park transforms and PI current regulators with sub-10 μs latency. Use Value: 80 MIPS throughput ensures >20 kHz control loop update rate; programmable timer and flag pins synchronize PWM generation and ADC triggers. | Use Scenario: Trusted boot loader verifying signed firmware images before loading into execution memory on safety-critical embedded controllers. IC Role / Device Role / Timing Role: Secure initialization processor validating cryptographic signatures using on-chip RAM-resident routines prior to main application launch. Use Value: Dual-boot capability (BDMA from EPROM or IDMA from secure host) enables fail-safe recovery; power-down mode preserves state during signature verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSP microcomputer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2186NKSTZ-320 | 8K words program RAM / 8K words data RAM - half the on-chip memory of ADSP-2185NKSTZ-320. | Suitable for simpler control algorithms with smaller code footprint; insufficient for full G.711 codec + echo canceller. | Select when memory budget is constrained and algorithm complexity is reduced. |
| ADSP-2189NKSTZ-320 | 32K words program RAM / 48K words data RAM - larger memory than ADSP-2185NKSTZ-320; same LQFP package. | Supports multi-channel audio processing or larger filter banks; higher BOM cost and power draw. | Choose when expanding functionality beyond single-channel voice processing is required. |
Compared with ADSP-2185NKSTZ-320, ADSP-2186NKSTZ-320 offers lower memory capacity for cost-sensitive control tasks, while ADSP-2189NKSTZ-320 provides headroom for feature-rich audio processing - all share identical instruction set, pinout, and ICE-Port™ debug infrastructure.
Availability
ADSP-2185NKSTZ-320 is available at Aetrix Electronics and suitable for voice codec development, industrial motor control interfaces, and secure firmware boot controller designs requiring stable component supply across extended production lifecycles.
Supply support for ADSP-2185NKSTZ-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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.
The ADSP-218xN series was designed as a low-power, code-compatible evolution of the ADSP-2100 family - targeting real-time embedded DSP applications where deterministic latency, on-chip memory integration, and debug-in-system capability are critical.
FAQ
What is the maximum sustained processing performance of the ADSP-2185NKSTZ-320?
The ADSP-2185NKSTZ-320 delivers 80 MIPS sustained performance at 12.5 ns instruction cycle time. This is achieved through single-cycle instruction execution, dual-operand fetch capability, and parallel operation of its ALU, MAC, and shifter units - all confirmed in the Analog Devices ADSP-218xN Rev. A datasheet Section "PERFORMANCE FEATURES". The 80 MIPS rating applies under 1.8 V core supply conditions with full utilization of the 3-bus architecture.
Does the ADSP-2185NKSTZ-320 support hardware-based audio companding?
Yes, the ADSP-2185NKSTZ-320 supports A-law and μ-law companding in hardware via its two serial ports (SPORT0 and SPORT1), as specified in the ADSP-218xN Rev. A datasheet Section "Serial Ports". This allows direct G.711-compliant voice encoding/decoding without external codec ICs - reducing BOM count and board space in telephony endpoints.
What package type and pin count does the ADSP-2185NKSTZ-320 use?
The ADSP-2185NKSTZ-320 uses a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad, as documented in the ADSP-218xN Rev. A datasheet Page 40 ("LQFP Package Pinout"). It is pin-compatible with other ADSP-218xN family members including ADSP-2184N, ADSP-2186N, and ADSP-2189N in the same LQFP variant.
Can the ADSP-2185NKSTZ-320 boot directly from external byte-wide memory?
Yes, the ADSP-2185NKSTZ-320 supports automatic booting from byte-wide external memory (e.g., EPROM) using its Byte DMA (BDMA) port. As described in the ADSP-218xN Rev. A datasheet Section "GENERAL DESCRIPTION", it loads the first 32 program memory words during reset and begins execution - enabling standalone operation without host intervention.
What debug interface does the ADSP-2185NKSTZ-320 provide for in-system development?
The ADSP-2185NKSTZ-320 features the ICE-Port™ emulator interface, which supports non-intrusive debugging, real-time breakpoint insertion, and memory inspection in fully powered, operational systems - as stated in the ADSP-218xN Rev. A datasheet Section "SYSTEM INTERFACE FEATURES". This interface is electrically and logically compatible with Analog Devices' EZ-KIT Lite and third-party JTAG emulators.
ADSP-2185NKSTZ-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:
- 1.80V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185NKSTZ-320 FAQ
1.How can I place an order for ADSP-2185NKSTZ-320 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185NKSTZ-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-2185NKSTZ-320 reliable?
The price and inventory of ADSP-2185NKSTZ-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-2185NKSTZ-320 is usually 5 days.
3.What payment methods are accepted for ADSP-2185NKSTZ-320?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185NKSTZ-320 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185NKSTZ-320?
ADSP-2185NKSTZ-320 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185NKSTZ-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-2185NKSTZ-320?
For technical support, including ADSP-2185NKSTZ-320 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185NKSTZ-320 requirements.
6.How does Aetrix verify that ADSP-2185NKSTZ-320 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185NKSTZ-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-2185NKSTZ-320 meets industry standards.
7.What is the process for return or replacement of ADSP-2185NKSTZ-320?
All ADSP-2185NKSTZ-320 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185NKSTZ-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-2185NKSTZ-320 part is unused and in its original packaging.
Return procedure for ADSP-2185NKSTZ-320:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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