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Analog Devices Inc. ADSP-2105BP-55
- Part No.:
- ADSP-2105BP-55
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
ADSP-2105BP-55.pdf
- Description:
- 16-BIT DIGITAL SIGNAL PROCESSOR
- Quantity:
- Payment:
- Shipping:
Inventory:118
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Product details
Overview
ADSP-2105BP-55 from Analog Devices is a 16-bit fixed-point DSP microprocessor with on-chip 1K × 16-bit data RAM and 1K × 16-bit program RAM, operating at 20 MHz (50 ns instruction cycle), supporting single-cycle instruction execution, dual-data-address generators with modulo/bit-reverse addressing, and one synchronous serial port (SPORT1) for real-time audio and telecom signal processing.
For engineers reviewing the ADSP-2105BP-55 datasheet, ADSP-2105BP-55 pinout, ADSP-2105BP-55 application, or ADSP-2105BP-55 equivalent, key selection considerations include its 50 ns timing grade, PLCC-68 package, absence of SPORT0 and host interface port, boot-from-EPROM capability, and industrial temperature range (–40°C to +85°C).
Technical Context
The ADSP-2105BP-55 implements the ADSP-2100 Family's enhanced Harvard architecture with three independent internal buses (PMA/PMD/DMA/DMD/R), enabling simultaneous instruction fetch, dual operand access, and computation in one cycle. Its ALU, multiplier/accumulator, and shifter operate on 16-bit data with support for multiprecision arithmetic and zero-overhead looping.
It features a programmable 16-bit interval timer (TCOUNT/TPERIOD/TSCALE), edge- or level-sensitive IRQ2 interrupt, and SPORT1 with hardware A-law/µ-law companding, double-buffered transmit/receive, and frameless or framed synchronous serial I/O - but excludes SPORT0 and host interface port found in higher variants like ADSP-2111 or ADSP-2115.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Enhanced Harvard: separate program/data memory spaces with three-bus performance (PMA, PMD, DMA, DMD, R) |
| Instruction Cycle Time | 50 ns - enables deterministic 20 MHz real-time signal processing with guaranteed single-cycle execution for most instructions |
| On-Chip Memory | 1K × 16-bit data RAM + 1K × 16-bit program RAM - sufficient for compact filter kernels and control code without external memory |
| Serial Interface | One SPORT1 (5-pin): bidirectional, double-buffered, with hardware companding and multichannel-ready framing logic |
| Interrupts | Three external pins (IRQ2 dedicated; IRQ0/IRQ1 multiplexed with SPORT1 I/O) - supports event-driven I/O and timer-triggered processing |
| Boot Capability | Automatic byte-wide EPROM boot via external data bus - eliminates need for boot loader code and simplifies system initialization |
| Supply Voltage | 5 V ± 5% - compatible with legacy TTL-level system power domains and standard logic interfaces |
Pinout & Package
ADSP-2105BP-55 is housed in a 68-lead plastic leaded chip carrier (PLCC) package with J-lead profile, 25.4 mm × 25.4 mm body size, and 1.27 mm lead pitch - suitable for through-hole and surface-mount assembly with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Clock Input | Accepts TTL-compatible external clock or crystal oscillator input; determines 20 MHz core timing |
| RESET | Master Reset | Active-low asynchronous reset that initializes program counter, status registers, and memory pointers |
| IRQ2 | External Interrupt 2 | Dedicated, maskable, edge/level-configurable interrupt input for high-priority system events |
| SCLK, RFS, TFS, DR, DT | SPORT1 Interface | Full 5-signal synchronous serial interface - supports TDM, voice codec, and sensor streaming without external glue logic |
| BMS, DMS, PMS | Memory Space Select | Three output signals indicating active memory space (boot, data, or program) during external bus cycles |
| BR, BG | Bus Request/Grant | Enables external DMA controllers to arbitrate for shared address/data buses without halting DSP execution |
Key Features
| Feature | Design Value |
|---|---|
| Single-Cycle Instruction Execution | Every instruction completes in one 50 ns cycle - guarantees bounded latency for real-time control loops and audio sample processing |
| Dual Data Address Generators (DAGs) | Two independent DAGs with modulo and bit-reverse addressing - accelerates FFT, FIR, and circular buffer operations without software overhead |
| Zero-Overhead Looping | Hardware loop stack supports nested loops with no branch penalty - critical for efficient implementation of multiply-accumulate kernels |
| Companding Hardware | Integrated A-law and µ-law encoding/decoding per CCITT G.711 - eliminates need for external codec ICs in telephony applications |
| Low-Power IDLE Instruction | Halts CPU clocks while preserving register and memory state - reduces dynamic power during idle periods in battery-constrained systems |
Applications
| Voice Codec Interface | Industrial Motor Control |
|---|---|
Use Scenario: Real-time G.711-compliant voice encoding/decoding between analog telephone line and digital backplane. IC Role / Device Role / Timing Role: Primary signal processor handling sample-rate conversion, echo cancellation, and companding in 125 µs frame intervals. Use Value: On-chip SPORT1 and hardware companding eliminate external codec and reduce BOM count by two ICs versus discrete solutions. |
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 SVM modulation at 10–20 kHz PWM update rate. Use Value: 50 ns instruction cycle ensures sub-microsecond latency for current-loop updates, meeting IEC 61800-3 response requirements. |
| Digital Audio Effects Processor | Embedded Test Instrumentation |
Use Scenario: Compact guitar effects pedal implementing parametric EQ, reverb, and distortion algorithms with analog I/O. IC Role / Device Role / Timing Role: Standalone DSP executing 48 kHz audio pipeline with 64-sample latency budget. Use Value: 1K data RAM accommodates dual-buffered 64-sample I/O buffers plus coefficient storage, avoiding external SRAM. |
Use Scenario: Portable handheld tester performing FFT-based spectral analysis on sensor outputs in predictive maintenance tools. IC Role / Device Role / Timing Role: Dedicated coprocessor offloading FFT, windowing, and peak detection from main MCU. Use Value: Bit-reverse addressing and zero-overhead loops enable 1024-point radix-2 FFT in under 1.2 ms - meeting portable device power and response targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSP microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2101KP-55 | Same 50 ns speed grade and PLCC-68 package, but with 2K program RAM + 1K data RAM and both SPORT0/Sport1 | Supports multichannel TDM (e.g., T1/E1) and dual-serial-link systems where ADSP-2105BP-55 lacks SPORT0 | Select when needing SPORT0 multichannel capability or larger program memory for complex algorithms |
| ADSP-2105KP-55 | Identical core, memory, and peripheral set, but commercial-grade (0°C to +70°C) vs. industrial-grade (–40°C to +85°C) of ADSP-2105BP-55 | Restricted to benign-environment applications (e.g., consumer audio) where extended temperature operation is unnecessary | Select only for cost-sensitive commercial designs with verified ambient thermal profile |
Compared with ADSP-2105BP-55, ADSP-2101KP-55 adds SPORT0 and doubles program RAM at the cost of higher unit price and identical industrial temp rating, while ADSP-2105KP-55 offers identical functionality at lower cost but sacrifices operational reliability across industrial temperature extremes.
Availability
ADSP-2105BP-55 is available at Aetrix Electronics and suitable for industrial motor control, voice codec interface, digital audio effects processing, and embedded test instrumentation requiring stable component supply over extended product lifecycles.
Supply support for ADSP-2105BP-55 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 global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and real-time control.
The ADSP-2100 Family - including ADSP-2105BP-55 - was designed for cost-sensitive, low-latency embedded DSP applications in telecom, audio, and industrial automation where deterministic timing and on-chip integration reduce system complexity.
FAQ
What is the maximum operating frequency of the ADSP-2105BP-55?
The ADSP-2105BP-55 operates at a maximum instruction rate of 20 MHz, corresponding to a 50 ns instruction cycle time. This timing grade is confirmed in the ADSP-2100 Family datasheet Table I and applies specifically to the "BP" industrial temperature variant. The ADSP-2105BP-55 does not support the 25 MHz grade offered by ADSP-2115 or ADSP-2101 variants.
Does the ADSP-2105BP-55 include a host interface port (HIP)?
No, the ADSP-2105BP-55 does not include a host interface port. The HIP is exclusive to the ADSP-2111 variant within the ADSP-2100 Family. The ADSP-2105BP-55 provides only one serial port (SPORT1), a timer, and three external interrupt inputs - consistent with its positioning as a low-cost, single-serial-link DSP solution.
What memory configuration does the ADSP-2105BP-55 feature?
The ADSP-2105BP-55 integrates 1K × 16-bit on-chip data RAM and 1K × 16-bit on-chip program RAM. This configuration is explicitly listed in Table I of the ADSP-2100 Family datasheet under the "2105" column and distinguishes it from the ADSP-2101 (2K program RAM) and ADSP-2115 (1K program RAM but 80-lead PQFP package).
Which package type is used for the ADSP-2105BP-55?
The ADSP-2105BP-55 uses a 68-lead plastic leaded chip carrier (PLCC) package, as confirmed in the "Packages" row of Table I and the "PIN CONFIGURATIONS" section (page 52) of the ADSP-2100 Family datasheet. It is not available in PGA, PQFP, or TQFP variants - those are assigned to other members like ADSP-2101 or ADSP-2115.
Can the ADSP-2105BP-55 boot from external memory?
Yes, the ADSP-2105BP-55 supports automatic booting from byte-wide external memory such as EPROM. Upon reset, it generates three wait states to accommodate slower boot devices (e.g., 200 ns EPROM), and loads program code into its on-chip program RAM before execution begins - a capability documented in the "GENERAL DESCRIPTION" and "Boot Memory Interface" sections of the datasheet.
ADSP-2105BP-55 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Fixed Point
- Interface:
- Synchronous Serial Port (SSP)
- Clock Rate:
- 13.824MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 1.5kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.23x24.23)
ADSP-2105BP-55 FAQ
1.How can I place an order for ADSP-2105BP-55 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2105BP-55 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-2105BP-55 reliable?
The price and inventory of ADSP-2105BP-55 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2105BP-55 is usually 5 days.
3.What payment methods are accepted for ADSP-2105BP-55?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2105BP-55 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2105BP-55?
ADSP-2105BP-55 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2105BP-55 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-2105BP-55?
For technical support, including ADSP-2105BP-55 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2105BP-55 requirements.
6.How does Aetrix verify that ADSP-2105BP-55 is sourced from the original manufacturer or authorized distributors?
All ADSP-2105BP-55 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-2105BP-55 meets industry standards.
7.What is the process for return or replacement of ADSP-2105BP-55?
All ADSP-2105BP-55 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2105BP-55, 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-2105BP-55 part is unused and in its original packaging.
Return procedure for ADSP-2105BP-55:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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