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Analog Devices Inc. ADSP-2185LKST-115
- Part No.:
- ADSP-2185LKST-115
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185LKST-115.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:246
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Product details
Overview
ADSP-2185LKST-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 SPORTs 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-2185LKST-115 datasheet, ADSP-2185LKST-115 pinout, ADSP-2185LKST-115 application, or ADSP-2185LKST-115 equivalent, key selection criteria include on-chip memory configuration, dual serial port timing support, power-down recovery latency, host/full memory mode flexibility, and ICE-Port™ debug interface compatibility.
Technical Context
The ADSP-2185LKST-115 implements the ADSP-2100 family base architecture with three independent computational units (ALU, MAC, shifter), two dedicated DAGs, and zero-overhead looping via hardware loop counters. Its 3-bus Harvard architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - per instruction cycle.
It supports two configurable synchronous serial ports (SPORT0/SPORT1) with frame sync, A-law/µ-law companding per CCITT G.711, and optional UART emulation. Memory interface modes include Full Memory Mode (14-bit address, 24-bit data) and Host Mode (16-bit multiplexed IDMA bus), selected at reset via Mode C pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 30 ns - enables deterministic 33 MIPS sustained throughput for real-time filter execution. |
| On-Chip Program Memory | 16K × 24-bit RAM - stores instructions and constants; dual-purpose for data overlay without external access. |
| On-Chip Data Memory | 16K × 16-bit RAM - provides low-latency operand access for FFT, FIR, and IIR algorithms. |
| Serial Ports | 2 × double-buffered SPORTs - support full-duplex TDM, frame sync, and hardware companding for voice codec interfacing. |
| Power-Down Recovery | 100 CLKIN cycles - allows rapid wake-up from ultra-low-power state for burst-mode signal processing. |
| Package | 100-lead TQFP (14 mm × 14 mm, 0.5 mm pitch) - surface-mount compatible with standard reflow profiles. |
| Supply Voltage | 5 V ± 10% - single-supply operation simplifies power design versus mixed-voltage DSPs. |
Pinout & Package
ADSP-2185LKST-115 is housed in a 100-lead thin quad flat pack (TQFP) with 0.5 mm lead pitch and exposed thermal pad. Pin functionality is mode-dependent: Full Memory Mode uses A13–A0 and D23–D0 for external memory; Host Mode repurposes pins as IAD15–IAD0, IWR, IRD, IAL, IS, and IACK. Serial port, flag, and interrupt pins are software-configurable during runtime.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Asynchronous processor reset input | Asserted low to initialize registers, clear stacks, and force boot sequence from external EPROM or IDMA. |
| CLKIN / XTAL | System clock source interface | Accepts 16.67 MHz crystal (fundamental parallel-resonant) or TTL-compatible half-rate clock; determines 30 ns instruction timing. |
| SPORT0 (SCLK0, RFS0, TFS0, DT0, DR0) | Synchronous serial interface #0 | Configurable for TDM, frame sync, or UART emulation; supports 3–16 bit word lengths and hardware A-law/µ-law. |
| SPORT1 (SCLK1, RFS1/IRQ0, TFS1/IRQ1, DT1/FO, DR1/FI) | Multiplexed serial port / interrupt / flag interface | Enables either full serial I/O or dual external interrupts + flag signaling - no hardware conflict due to software-selectable mode. |
| PWD / PWDACK | Hardware power-down control pair | PWD input initiates low-power dormant state; PWDACK output confirms entry into power-down within 100 cycles. |
| EZ-Port (9 pins) | ICE-Port™ emulator interface | Provides 14-pin functional subset (9 used) for non-intrusive in-circuit debugging without target board modification. |
Key Features
| Feature | Design Value |
|---|---|
| Three independent computational units | ALU, MAC (40-bit accumulator), and shifter operate in parallel - enables single-cycle multiply-accumulate plus address update for efficient FIR filtering. |
| Dual data address generators (DAGs) | Each maintains four post-modified pointers with length registers - supports automatic circular buffering for FFT and delay-line applications without CPU overhead. |
| Zero-overhead hardware looping | Loop counter and stack managed entirely in hardware - eliminates branch penalty and preserves pipeline efficiency during repetitive kernel execution. |
| Programmable 16-bit interval timer | TCOUNT decrements every TSCALE cycles; generates periodic interrupt and auto-reloads from TPERIOD - ideal for sample-rate timing in audio systems. |
| Flexible memory interface modes | Full Memory Mode (external 4 MB byte memory) or Host Mode (16-bit IDMA) selected at reset - enables scalable system integration from standalone to host-processor co-processing. |
Applications
| Voice Codec Interface | Industrial Motor Control |
|---|---|
|
Use Scenario: Interfacing AD1847 SoundPort® codec in telephony terminal equipment with echo cancellation and DTMF generation. IC Role / Device Role / Timing Role: Primary DSP executing real-time 16-bit linear PCM processing, companding, and serial framing via SPORT0/SPORT1. Use Value: Hardware A-law/µ-law companding reduces external component count; on-chip 32K words RAM eliminates need for external SRAM in compact designs. |
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 execution of Park/Clarke transforms, PI regulators, and space-vector PWM generation with deterministic 30 ns instruction timing. Use Value: Dual DAGs enable concurrent access to coefficient tables and motor feedback buffers; 100-cycle power-down recovery supports energy-efficient idle states between control cycles. |
| Medical Ultrasound Beamforming | Test & Measurement Signal Analysis |
|
Use Scenario: Digital beamformer in portable ultrasound systems requiring channel summation, filtering, and envelope detection. IC Role / Device Role / Timing Role: High-throughput data mover and arithmetic engine handling multi-channel ADC samples via byte DMA and internal RAM. Use Value: 24-bit program memory accommodates large filter coefficient sets; 16-bit data memory supports 16-bit ADC input precision with minimal quantization error. |
Use Scenario: Portable spectrum analyzer capturing and processing RF IF signals with real-time FFT and peak detection. IC Role / Device Role / Timing Role: Standalone signal processor performing 1024-point FFT, windowing, and magnitude calculation using on-chip memory. Use Value: Single-cycle context switch enables rapid task switching between acquisition and analysis; ICE-Port™ allows firmware validation in final PCB layout. |
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-2189MKST-133 | Higher speed grade: 25 ns instruction cycle (40 MIPS), same 100-TQFP package and memory map. | Requires faster external memory and clock source; not drop-in compatible due to timing margin differences. | Select when >33 MIPS sustained throughput is required and system clock can be increased to 20 MHz. |
| TMS320C549PGE | 16-bit fixed-point DSP with 100-MIPS performance, different instruction set, 144-pin LQFP package. | No ICE-Port™; requires full toolchain migration; lacks integrated byte DMA and dual SPORT companding. | Consider only for new designs where TI's C5000 ecosystem and higher MIPS/watt justify architecture change. |
Compared with ADSP-2185LKST-115, the ADSP-2189MKST-133 offers higher throughput but tighter timing constraints, while the TMS320C549PGE delivers greater raw performance at the cost of toolchain discontinuity, larger footprint, and loss of Analog Devices' integrated serial/audio features.
Availability
ADSP-2185LKST-115 is available at Aetrix Electronics and suitable for voice codec interfaces, industrial motor controllers, medical ultrasound beamformers, and portable test equipment requiring stable component supply across extended product lifecycles.
Supply support for ADSP-2185LKST-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.
The ADSP-2185LKST-115 belongs to the ADSP-2100 family of fixed-point DSP microcomputers designed for deterministic real-time signal processing in resource-constrained embedded systems with integrated memory and serial peripherals.
FAQ
What clock source options does the ADSP-2185LKST-115 support?
The ADSP-2185LKST-115 accepts either a 16.67 MHz fundamental parallel-resonant crystal across CLKIN/XTAL pins or a TTL-compatible 16.67 MHz clock signal applied to CLKIN only (XTAL left unconnected). The internal oscillator circuit automatically configures for crystal operation; external clock mode disables the oscillator. Both sources yield a 30 ns instruction cycle time, and CLKOUT reflects the internal instruction clock when enabled.
How does the ADSP-2185LKST-115 handle power management in battery-powered systems?
The ADSP-2185LKST-115 implements three low-power states: Power-Down (100-cycle wake-up), Idle (indefinite wait until interrupt), and Slow Idle (programmable clock divisor of 16/32/64/128). Power-Down is initiated via PWD pin or software bit; PWDACK confirms entry. In all modes, on-chip RAM retains data, and ICE-Port™ remains accessible for debug - enabling energy-efficient operation in portable audio and medical devices.
Can the ADSP-2185LKST-115 boot directly from external memory?
Yes, the ADSP-2185LKST-115 supports automatic booting from byte-wide external memory (e.g., EPROM or flash) via its Byte DMA port. During reset, it loads the first 32 words from external address 0x000000 into internal program RAM and begins execution. Boot mode is fixed by hardware configuration; no bootloader code is required. This enables field-upgradable firmware without JTAG or external programmer dependency.
What is the function of the EZ-Port on the ADSP-2185LKST-115?
The EZ-Port on the ADSP-2185LKST-115 is Analog Devices' ICE-Port™ interface - a 9-pin subset of the full 14-pin debug port - enabling non-intrusive in-circuit emulation. It supports breakpoint setting, register/memory inspection, single-stepping, and C-source-level debugging without removing the ADSP-2185LKST-115 from the target board or modifying PCB layout, making it ideal for final-system validation.
Does the ADSP-2185LKST-115 support simultaneous access to program and data memory?
Yes, the ADSP-2185LKST-115's 3-bus Harvard architecture permits simultaneous fetch of an instruction from program memory and an operand from data memory in every instruction cycle. Its dual DAGs generate independent addresses for data memory, while the program sequencer supplies the program memory address - enabling true dual-operand operations such as MAC+load without pipeline stalls.
ADSP-2185LKST-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:
- 3.30V
- Voltage - Core:
- 3.30V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
ADSP-2185LKST-115 FAQ
1.How can I place an order for ADSP-2185LKST-115 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185LKST-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-2185LKST-115 reliable?
The price and inventory of ADSP-2185LKST-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-2185LKST-115 is usually 5 days.
3.What payment methods are accepted for ADSP-2185LKST-115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185LKST-115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185LKST-115?
ADSP-2185LKST-115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185LKST-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-2185LKST-115?
For technical support, including ADSP-2185LKST-115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185LKST-115 requirements.
6.How does Aetrix verify that ADSP-2185LKST-115 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185LKST-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-2185LKST-115 meets industry standards.
7.What is the process for return or replacement of ADSP-2185LKST-115?
All ADSP-2185LKST-115 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185LKST-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-2185LKST-115 part is unused and in its original packaging.
Return procedure for ADSP-2185LKST-115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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