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Analog Devices Inc. ADSP-2185KSTZ-115
- Part No.:
- ADSP-2185KSTZ-115
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185KSTZ-115.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADSP-2185KSTZ-115 from Analog Devices is a 33 MIPS fixed-point DSP microcomputer optimized for real-time audio, telecom, and industrial control applications. It integrates 16K × 24-bit on-chip program RAM, 16K × 16-bit on-chip data RAM, dual 16-bit serial ports with hardware companding, a 16-bit internal DMA port, and operates at 30 ns instruction cycle time (33 MHz equivalent) in a 100-lead TQFP package.
For engineers reviewing the ADSP-2185KSTZ-115 datasheet, ADSP-2185KSTZ-115 pinout, ADSP-2185KSTZ-115 application, or ADSP-2185KSTZ-115 equivalent, key selection criteria include sustained 33 MIPS performance, zero-overhead looping capability, dual SPORTs supporting A-law/µ-law, 100-cycle power-down recovery, and ICE-Port™-enabled in-circuit emulation without target board modification.
Technical Context
The ADSP-2185KSTZ-115 implements the ADSP-2100 family base architecture with three independent computational units (ALU, MAC, shifter), two dedicated DAGs, and a zero-overhead program sequencer. Its 3-bus architecture enables simultaneous dual operand fetches per instruction cycle - one from program memory and one from data memory - while executing computation and updating address pointers.
It supports full memory mode (14-bit address bus, 24-bit data bus) or host mode (16-bit multiplexed IDMA bus), programmable wait states for slow peripherals, and flexible interrupt handling with six external IRQ inputs (edge/level configurable), timer, SPORT, BDMA, and nonmaskable power-down interrupts - all managed via IMASK and ICNTL registers.
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 context switches. |
| On-Chip Memory | 80 KB total: 16K × 24-bit program RAM + 16K × 16-bit data RAM - eliminates need for external program/data memory in many embedded DSP designs. |
| Serial Ports | Two double-buffered SPORTs - support synchronous frameless/framed operation, 3–16-bit word lengths, and hardware A-law/µ-law companding per CCITT G.711. |
| Power-Down Recovery | 100 CLKIN cycles - allows rapid wake-up from ultra-low-power state without oscillator stabilization delay when using external clock. |
| Package | 100-lead TQFP (14 mm × 14 mm, 0.5 mm pitch) - surface-mount compatible with standard reflow profiles and high I/O density for system integration. |
| Process Technology | 0.5 µm CMOS - delivers low active and standby power dissipation suitable for battery-powered portable equipment. |
| Emulation Interface | 14-pin ICE-Port™ - provides full-speed in-target debugging, breakpoint support, register/memory access, and C-source-level trace without removing the ADSP-2185KSTZ-115 from the target board. |
Pinout & Package
ADSP-2185KSTZ-115 is housed in a 100-lead thin quad flat pack (TQFP) with 0.5 mm lead pitch, compliant with JEDEC MO-152AC. Pin functions are mode-dependent: Full Memory Mode uses A13:A0 and D23:D0 for external addressing/data; Host Mode repurposes pins as IAD15:IAD0, IWR, IRD, IAL, IS, and IACK for 16-bit IDMA interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Asynchronous processor reset input | Active-low signal that initializes all registers, clears stacks, and forces boot sequence - must be held low ≥100 ns after power stabilization. |
| CLKIN / XTAL | System clock input (crystal or TTL) | Accepts 16.67 MHz external clock (half-instruction rate) or parallel-resonant crystal - determines core timing; CLKOUT reflects internal instruction clock when enabled. |
| SPORT0 / SPORT1 | Dual synchronous serial I/O interfaces | Each provides independent Tx/Rx double buffers, programmable clocks, framing, and optional companding - SPORT1 can be reconfigured to expose IRQ0/IRQ1 and Flag In/Out signals. |
| PF0–PF7 | Programmable flag I/O pins | 13 total flags: 8 software-configurable as input/output, 3 dedicated outputs (FL0–FL2), with concurrent interrupt functionality on IRQ/Flag multiplexed pins (e.g., IRQ2/PF7). |
| PWD / PWDACK | Hardware power-down control | PWD initiates low-power dormant state; PWDACK asserts when power-down is fully entered - enables precise coordination with external power management circuitry. |
| EZ-Port (9 pins) | ICE-Port™ emulator interface | Provides JTAG-compatible debug access: TRST, TCK, TMS, TDI, TDO, plus control/status lines - supports full-speed emulation, memory inspection, and non-intrusive breakpoint insertion. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-overhead looping | Hardware loop counters and stack eliminate branch penalties - enables deterministic execution of tight filter kernels and FFT butterflies without cycle loss. |
| Dual operand fetch per cycle | 3-bus architecture (PMA, DMA, R) allows simultaneous instruction fetch, data load, and result write - critical for MAC-intensive FIR/IIR implementations. |
| Flexible memory interface modes | Full Memory Mode (external overlay support) and Host Mode (IDMA for glueless microcontroller interfacing) - simplifies integration into heterogeneous systems without custom logic. |
| Hardware companding | Integrated A-law and µ-law encoding/decoding per CCITT G.711 - offloads CPU from real-time voice compression tasks in telephony and VoIP endpoints. |
| Low-power operation | Three distinct modes: Power-Down (100-cycle wake), Idle (interrupt-wait), Slow Idle (programmable 16×–128× clock scaling) - extends battery life in portable DSP instruments and field-deployed sensors. |
Applications
| Voice Communications Terminal | Industrial Motor Control System |
|---|---|
Use Scenario: Real-time echo cancellation and DTMF detection in analog telephone interface modules. IC Role / Device Role / Timing Role: Primary DSP executing adaptive filtering algorithms with sub-100 µs latency constraints and synchronized sampling via SPORT0. Use Value: On-chip 16K × 24-bit program RAM stores optimized filter coefficients; hardware companding reduces CODEC bandwidth by 50% versus linear PCM. | Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase AC induction motors in HVAC and pump drives. IC Role / Device Role / Timing Role: Real-time PWM waveform generation and current/voltage feedback processing with deterministic 50 µs control loop timing. Use Value: Dual DAGs enable concurrent ADC data buffering and PWM update; 33 MIPS throughput ensures >20 kHz switching frequency with margin for safety monitoring. |
| Audio Signal Processing Module | Embedded Test & Measurement Instrument |
Use Scenario: Multi-band parametric equalization and dynamic range compression in professional audio mixers. IC Role / Device Role / Timing Role: Dedicated audio DSP handling 48 kHz stereo streams with low-latency buffer management via SPORT1 and internal DMA. Use Value: Double-buffered SPORTs prevent audio dropouts during coefficient updates; 16K × 16-bit data RAM accommodates 256-sample FFT windows with overlap-save processing. | Use Scenario: Portable oscilloscope front-end performing real-time FFT spectrum analysis and waveform triggering. IC Role / Device Role / Timing Role: High-speed data acquisition controller synchronizing ADC sampling, storing raw samples, and computing spectral content. Use Value: 100-cycle power-down recovery enables rapid instrument wake-from-sleep; ICE-Port™ allows firmware updates and algorithm validation in final enclosure. |
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 | Higher speed grade: 25 ns cycle time (40 MIPS), same 100-TQFP package and instruction set - adds enhanced multiplier pipeline and extended ALU constants. | Required for applications needing >33 MIPS sustained throughput, e.g., multi-channel wideband audio codecs or real-time video preprocessing. | Select ADSP-2189MSTZ-133 when higher compute headroom is needed without changing PCB layout or software architecture. |
| TMS320VC5402PGE | TI C54x architecture: 100-MIPS peak, 16K × 16-bit RAM, 16-bit HPI, but lacks dual SPORTs with hardware companding and ICE-Port™. | Suitable for cost-sensitive telecom infrastructure where HPI interface to host MCU is preferred over dual serial autonomy. | Choose TMS320VC5402PGE only if TI toolchain compatibility and HPI-based system partitioning outweigh loss of ADSP-2185KSTZ-115's integrated serial/audio features. |
Compared with ADSP-2185KSTZ-115, ADSP-2189MSTZ-133 offers higher performance in identical packaging for seamless upgrade paths, while TMS320VC5402PGE trades serial autonomy and emulation simplicity for raw MIPS and TI ecosystem alignment - neither is pin-compatible, requiring board redesign for migration.
Availability
ADSP-2185KSTZ-115 is available at Aetrix Electronics and suitable for voice communications terminals, industrial motor controllers, professional audio modules, and portable test instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for ADSP-2185KSTZ-115 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, headquartered in Norwood, MA.
The ADSP-21xx family - including ADSP-2185KSTZ-115 - was designed specifically for embedded real-time DSP applications demanding deterministic low-latency execution, integrated memory, and robust system interface flexibility in industrial, audio, and communications equipment.
FAQ
What clock source options does the ADSP-2185KSTZ-115 support?
The ADSP-2185KSTZ-115 accepts either a 16.67 MHz TTL-compatible external clock applied to CLKIN (with XTAL left unconnected), or a parallel-resonant fundamental-mode crystal (e.g., 33.33 MHz) across CLKIN/XTAL pins. The internal oscillator automatically configures for crystal operation; external clock mode disables the oscillator to reduce power. Both sources yield a 30 ns instruction cycle time.
Does the ADSP-2185KSTZ-115 support in-circuit debugging without removing the chip from the target board?
Yes, the ADSP-2185KSTZ-115 integrates on-chip ICE-Port™ emulation support accessible via its dedicated 14-pin EZ-Port interface. This enables full-speed in-target debugging - including breakpoints, register/memory inspection, and C-source-level trace - without removing the ADSP-2185KSTZ-115 from the final PCB or adding socket adapters.
How does the ADSP-2185KSTZ-115 handle external memory interfacing in Full Memory Mode versus Host Mode?
In Full Memory Mode (Mode C = 0), ADSP-2185KSTZ-115 exposes A13:A0 and D23:D0 for direct connection to external byte-wide memory (up to 4 MB) and I/O peripherals. In Host Mode (Mode C = 1), it presents a 16-bit multiplexed IDMA bus (IAD15:IAD0) with dedicated control signals (IWR, IRD, IAL, IS, IACK) for glueless interfacing to microcontrollers or FPGAs - sacrificing address space for simplified system integration.
Can the ADSP-2185KSTZ-115 execute bit manipulation operations natively?
Yes, the ADSP-2185KSTZ-115 extends the base ADSP-2100 instruction set with native bit-level operations: BIT SET, BIT CLEAR, BIT TOGGLE, and BIT TEST. These instructions execute in a single cycle and operate directly on memory or register operands - enabling efficient GPIO control, protocol bit-banging, and status register management without software bit-shifting overhead.
What is the minimum recovery time from power-down mode for the ADSP-2185KSTZ-115?
The ADSP-2185KSTZ-115 guarantees recovery from hardware- or software-initiated power-down mode in exactly 100 CLKIN cycles. This deterministic wake-up time applies regardless of whether an external clock or crystal is used, and is independent of oscillator stabilization - making it suitable for battery-powered devices requiring rapid response to external triggers.
ADSP-2185KSTZ-115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADSP-21xx
- Package/Case:
- 100-LQFP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Type:
- Fixed Point
- Interface:
- Host Interface, Serial Port
- Clock Rate:
- 28.8MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 80kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185KSTZ-115 FAQ
1.How can I place an order for ADSP-2185KSTZ-115 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185KSTZ-115 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-2185KSTZ-115 reliable?
The price and inventory of ADSP-2185KSTZ-115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2185KSTZ-115 is usually 5 days.
3.What payment methods are accepted for ADSP-2185KSTZ-115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185KSTZ-115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185KSTZ-115?
ADSP-2185KSTZ-115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185KSTZ-115 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-2185KSTZ-115?
For technical support, including ADSP-2185KSTZ-115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185KSTZ-115 requirements.
6.How does Aetrix verify that ADSP-2185KSTZ-115 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185KSTZ-115 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-2185KSTZ-115 meets industry standards.
7.What is the process for return or replacement of ADSP-2185KSTZ-115?
All ADSP-2185KSTZ-115 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185KSTZ-115, 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-2185KSTZ-115 part is unused and in its original packaging.
Return procedure for ADSP-2185KSTZ-115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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