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Analog Devices Inc. ADSP-2185LKST-210
- Part No.:
- ADSP-2185LKST-210
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 100-LQFP
- Datasheet:
-
ADSP-2185LKST-210.pdf
- Description:
- IC DSP CONTROLLER 16BIT 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
ADSP-2185LKST-210 from Analog Devices is a 33 MIPS fixed-point DSP microcomputer with 16K × 24-bit on-chip program RAM, 16K × 16-bit on-chip data RAM, and dual 5-pin synchronous serial ports (SPORT0/SPORT1). It executes instructions in 30 ns cycles, supports zero-overhead looping, and integrates power-down mode with 100-cycle recovery-used in real-time audio processing, telecom channel banks, and portable instrumentation.
For engineers reviewing the ADSP-2185LKST-210 datasheet, ADSP-2185LKST-210 pinout, ADSP-2185LKST-210 application, or ADSP-2185LKST-210 equivalent, key selection criteria include instruction cycle time, on-chip memory configuration, serial port framing flexibility, power-down recovery latency, and TQFP-100 package compatibility with legacy ADSP-2100 family designs.
Technical Context
The ADSP-2185LKST-210 implements a three-bus Harvard architecture with independent ALU, MAC, and shifter units operating on 16-bit data paths, enabling single-cycle dual operand fetches and parallel computation. Its program sequencer delivers zero-overhead loops and conditional execution, while two dedicated DAGs support circular buffering and modulo addressing for FFT and filter kernels.
It features dual SPORTs with hardware A-law/µ-law companding per CCITT G.711, programmable 16-bit interval timer with prescaler, and 13 configurable flag pins-six of which double as external interrupt inputs (IRQ2, IRQL0/1, IRQE, IRQ0/1). Memory interface supports Full Memory Mode (14-bit address, 24-bit data) or Host Mode (16-bit IDMA bus), with software-selectable wait states for byte-wide EPROM or slow peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 30 ns - enables 33 MIPS sustained throughput for real-time FIR/IIR filtering at audio sampling rates. |
| On-Chip Program Memory | 16K × 24-bit RAM - stores both instructions and constants; eliminates external program ROM in compact systems. |
| On-Chip Data Memory | 16K × 16-bit RAM - provides low-latency access for coefficient tables and circular buffers without wait states. |
| Serial Ports | 2 × 5-pin SPORTs - support frame-synchronized, companded, or frameless operation up to 16-bit word length. |
| Power-Down Recovery | 100 CLKIN cycles - allows rapid wake-up from battery-saving state while preserving context integrity. |
| Package | 100-lead TQFP - surface-mount compatible with standard reflow profiles; pinout matches ADSP-2100 family footprint. |
| Supply Voltage | 5 V ± 10% - operates from single-rail supply; no separate I/O or core voltage rails required. |
Pinout & Package
ADSP-2185LKST-210 is housed in a 100-lead thin quad flat pack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body size, and exposed thermal pad. Pin functions are multiplexed during reset (mode select) or runtime (SPORT/flag reconfiguration), requiring careful initialization sequence control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Asynchronous processor reset input | Active-low signal that initializes all registers, clears stacks, and forces boot sequence from external EPROM or internal DMA port. |
| CLKIN / XTAL | System clock input (crystal or TTL) | Accepts 16.67 MHz crystal (fundamental parallel-resonant) or half-rate external clock; determines 30 ns instruction timing. |
| SPORT0[4:0] | Synchronous serial I/O interface | Configurable as transmit/receive data, frame sync, serial clock, or external interrupt (IRQ0/1 when SPORT1 remapped). |
| PF7–PF0 | Programmable flag I/O | Eight bidirectional flags usable as general-purpose signals or shared with IRQ2/IRQL0/1/IRQE; retain concurrent interrupt/flag functionality. |
| PWD / PWDACK | Hardware power-down control | PWD initiates low-power dormant state; PWDACK confirms entry into power-down, enabling external power gating logic. |
Key Features
| Feature | Design Value |
|---|---|
| Three computational units (ALU/MAC/Shifter) | Enables simultaneous arithmetic, multiply-accumulate, and bit-normalization in one cycle-critical for real-time FFT and adaptive filtering. |
| Dual data address generators (DAG1/DAG2) | Supports automatic circular buffer indexing and modulo addressing without CPU overhead-reduces loop management code by >40%. |
| ICE-Port™ emulator interface | 14-pin debug interface enabling in-circuit emulation without socket removal; supports breakpoint, register trace, and C-level debugging in final hardware. |
| Bit manipulation instructions | Includes bit set/clear/toggle/test opcodes-eliminates mask-and-shift sequences for peripheral register control in motor control firmware. |
| Software-configurable memory modes | Full Memory Mode (external overlay) or Host Mode (IDMA) selected via Mode C pin at reset-enables flexible system partitioning without hardware changes. |
Applications
| Voice Channel Processing | Portable Test Instrumentation |
|---|---|
Use Scenario: Real-time echo cancellation and DTMF detection in VoIP gateways using 8 kHz sampling. IC Role / Device Role / Timing Role: Primary DSP executing 128-tap adaptive filters and tone generation with deterministic 125 µs frame latency. Use Value: On-chip 32K words RAM eliminates external memory bottlenecks; SPORT companding reduces codec interface complexity. | Use Scenario: Battery-powered handheld oscilloscope capturing 1 MS/s waveform data with FFT analysis. IC Role / Device Role / Timing Role: Signal acquisition and spectral processing engine managing ADC DMA, circular buffer fills, and real-time magnitude calculation. Use Value: Power-down mode cuts active current to <5 mA; 100-cycle wake-up ensures responsive trigger response after idle periods. |
| Industrial Motor Control | Legacy Telecom Equipment |
Use Scenario: Field-oriented control (FOC) of 3-phase PMSM motors with space-vector PWM generation. IC Role / Device Role / Timing Role: Real-time position/speed estimator and current regulator running at 20 kHz PWM update rate. Use Value: Bit-manipulation instructions accelerate GPIO-based PWM edge alignment; dual DAGs manage encoder and current sample buffers concurrently. | Use Scenario: Channelized T1/E1 line card performing CAS signaling, HDLC framing, and jitter buffering. IC Role / Device Role / Timing Role: Dedicated channel processor handling 24× voice channels with time-slot assignment and CRC validation. Use Value: Dual SPORTs operate independently-one for trunk interface, one for backplane communication-enabling full-duplex 2.048 Mbps data flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-point DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2189MKSTZ-266 | Higher clock speed (266 MHz core, 3.75 ns cycle); 32K × 24-bit program RAM; same TQFP-100 package. | Targets higher-bandwidth applications like wideband audio codecs or multi-channel radar processing. | Select when >33 MIPS throughput or larger program memory is required; software-compatible but requires updated timing constraints. |
| TMS320C549PGE | TI C54x architecture; 100 MIPS @ 100 MHz; 32K × 16-bit RAM; 144-pin LQFP package. | Designed for cost-sensitive consumer audio; lacks integrated companding hardware and ICE-Port™. | Choose for high-volume production where TI toolchain familiarity exists; not pin-compatible-requires PCB redesign. |
Compared with ADSP-2185LKST-210, the ADSP-2189MKSTZ-266 offers 8× faster instruction throughput and doubled program memory but shares identical peripheral architecture and development tools; the TMS320C549PGE delivers higher peak MIPS in a different package with reduced on-chip integration, demanding external companding and custom debug infrastructure.
Availability
ADSP-2185LKST-210 is available at Aetrix Electronics and suitable for industrial motor control, portable test instrumentation, and legacy telecom equipment requiring stable component supply across extended product lifecycles.
Supply support for ADSP-2185LKST-210 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 is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies since 1965.
The ADSP-2185LKST-210 belongs to the ADSP-2100 family of fixed-point DSPs designed for real-time embedded signal processing in resource-constrained, low-power, and cost-sensitive applications.
FAQ
What is the maximum external memory bandwidth supported by ADSP-2185LKST-210 in Full Memory Mode?
ADSP-2185LKST-210 supports up to 4 MByte byte-wide external memory via its BDMA port, with programmable wait states allowing interface to memories with access times up to 200 ns. In Full Memory Mode, it uses A13–A0 and D23–D0 buses for direct addressing and data transfer-enabling efficient storage of large coefficient tables or program overlays without CPU intervention.
Does ADSP-2185LKST-210 support hardware-based A-law and µ-law companding?
Yes, ADSP-2185LKST-210 integrates dedicated hardware companding circuitry in both SPORT0 and SPORT1, compliant with CCITT G.711 standards. This enables lossless conversion between linear PCM and logarithmic encoding directly in the serial port-eliminating the need for software-based companding routines and reducing CPU load by ~15% in voice channel applications.
Can ADSP-2185LKST-210 execute code from external memory without bootloading into on-chip RAM?
No, ADSP-2185LKST-210 requires bootloading: it automatically copies program code from external byte-wide memory (e.g., EPROM) into its 16K × 24-bit on-chip program RAM at power-up or reset. Execution always occurs from on-chip RAM-ensuring deterministic 30 ns instruction timing and eliminating external memory access latency during real-time processing.
How many external interrupts does ADSP-2185LKST-210 support, and what are their sensitivity types?
ADSP-2185LKST-210 supports six external interrupts: IRQ2 (edge- or level-sensitive), IRQL0 and IRQL1 (level-sensitive), IRQE (edge-sensitive), and IRQ0/IRQ1 (reconfigurable via SPORT1). Sensitivity is controlled by the ICNTL register, and all except power-down are individually maskable in the IMASK register-providing flexible real-time event handling for motor control or telecom signaling.
Is ADSP-2185LKST-210 pin-compatible with other ADSP-2100 family members?
Yes, ADSP-2185LKST-210 uses the same 100-lead TQFP package and shares identical pinout with ADSP-2181/2185/2186 variants. Functionally, it maintains ADSP-2100 family instruction set compatibility while adding SPORT enhancements and bit-manipulation opcodes-allowing drop-in replacement in existing designs with minor software updates for new features.
ADSP-2185LKST-210 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:
- 52MHz
- 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-210 FAQ
1.How can I place an order for ADSP-2185LKST-210 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2185LKST-210 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-210 reliable?
The price and inventory of ADSP-2185LKST-210 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-210 is usually 5 days.
3.What payment methods are accepted for ADSP-2185LKST-210?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2185LKST-210 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2185LKST-210?
ADSP-2185LKST-210 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2185LKST-210 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-210?
For technical support, including ADSP-2185LKST-210 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2185LKST-210 requirements.
6.How does Aetrix verify that ADSP-2185LKST-210 is sourced from the original manufacturer or authorized distributors?
All ADSP-2185LKST-210 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-210 meets industry standards.
7.What is the process for return or replacement of ADSP-2185LKST-210?
All ADSP-2185LKST-210 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2185LKST-210, 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-210 part is unused and in its original packaging.
Return procedure for ADSP-2185LKST-210:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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