ADSP-2105BP-55 - 20 MIPS 16-Bit DSP | Analog Devices
Référence : ADSP-2105BP-55 ✗ Fin de vieADSP-2105BP-55 Présentation
A digital signal processor is a specialized microprocessor whose internal architecture is optimized for arithmetic-intensive operations on sampled signals. The ADSP-2105 belongs to the ADSP-2100 family, combining a common DSP core, computation units, data address generators, and a program sequencer. Its enhanced Harvard architecture separates the instruction bus from two data buses, allowing instruction fetches and data transfers to proceed with greater independence than in a conventional shared-bus processor.
The processor provides a 16-bit data bus, 5 V supply operation, 20 MIPS throughput, and one serial port. Its fixed-point architecture is particularly useful in filtering, modulation, waveform generation, and embedded control systems. The ADSP-2105 family also incorporates on-chip memory and dedicated DSP execution resources to reduce the processing burden placed on external memory buses.
The ADSP-2105BP-55 combines the ADSP-2105 core with a 55-grade ordering option and an operating-temperature range of -40°C to +85°C. The product uses a 25 MHz clock in the listed specifications, while the associated family documentation describes the core and its three-bus architecture. Signal-processing behavior depends on the selected instruction sequence, memory organization, clock configuration, and external interface requirements.
Typical applications include digital filtering in audio and communications equipment, modulation and demodulation, industrial measurement, motor and motion control, embedded instrumentation, and general-purpose numeric processing where deterministic arithmetic and dedicated signal-processing resources are more valuable than a large general-purpose instruction set.
Designers should preserve the processor's power-supply, clock, reset, and memory-interface layout when making a PCB revision. Because the ADSP-2105 is listed as obsolete, new production designs should also evaluate currently supported processors and verify software, memory, timing, and peripheral compatibility rather than assuming a drop-in replacement.
This page combines the manufacturer product information with practical architecture guidance, application fit, package constraints, and compatibility-focused alternatives for engineers evaluating the ADSP-2105BP-55 in legacy DSP systems.
Alternatives de remplacement direct pour ADSP-2105BP-55 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ADSP-2105BP-55-G
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADSP-2105KP-55
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADSP-2105BPZ-80
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADSP-2105BP-55 Spécifications
| Product Type | 16-bit fixed-point digital signal processor |
| Instruction Throughput | 20 MIPS |
| Largeur du bus de données | 16 bit |
| Tension d'alimentation | 5 V |
| Clock Speed | 25 MHz |
| Architecture | Enhanced Harvard architecture with three buses |
| Instruction Bus | 1 instruction bus |
| Data Buses | 2 dual data buses |
| Serial Port Count | 1 serial port |
| Arithmetic Format | 16-bit fixed point |
| On-Chip Memory | Present |
| Package Type | Plastic leaded chip carrier (LCC-68) |
| Package Designation | PQCC-68 |
| Nombre de broches | 68 pins |
| Type de montage | Through-hole leaded package |
| Température de fonctionnement | -40°C to +85°C |
| Core Architecture | ADSP-2100 family common core |
| Program Sequencer | On-chip program sequencer |
| Data Address Generators | On-chip data address generators |
Guide de configuration des broches du ADSP-2105BP-55 pqcc-68
Configuration des broches du ADSP-2105BP-55 (boîtier pqcc-68). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour ADSP-2105BP-55.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ADSP-2105BP-55 convient pour 6 applications: Digital Audio Filtering, Communications Modulation, Industrial Measurement and Control, Motor and Motion Control, Test and Measurement Instruments, Legacy Audio and Control Interface.
Digital Audio Filtering
The ADSP-2105BP-55 fits legacy fixed-point audio filtering because its 20 MIPS throughput and dual data buses support sample-by-sample arithmetic while the 16-bit bus aligns with classic audio-processing architectures. In an equalizer, interpolator, or crossover, the processor can execute multiply-accumulate sequences while the separate instruction bus supports concurrent data movement. A 5 V supply simplifies adaptation to older audio boards, although system-level clock, memory, and serial-interface compatibility must be verified before substituting any related ordering code.
Recommandé
Communications Modulation
The ADSP-2105BP-55 is appropriate for fixed-point modulation, demodulation, filtering, and symbol-processing functions in legacy communications equipment. Its enhanced Harvard architecture separates instruction execution from the two data paths, enabling the program sequencer, computation units, and data address generators to sustain arithmetic-heavy throughput at 20 MIPS. The 68-pin LCC package favors established through-hole industrial designs, while the 16-bit data path and 5 V operation support integration with older transceiver and memory subsystems.
Recommandé
Industrial Measurement and Control
The ADSP-2105BP-55 can serve as the numerical core in industrial measurement, instrumentation, and closed-loop control systems that rely on deterministic fixed-point processing. Its 20 MIPS throughput supports filtering, calibration arithmetic, sensor compensation, and control calculations, while the dual data buses reduce contention among computation and memory operations. The 5 V supply and 68-pin leaded package suit many established control boards, but the processor's obsolete lifecycle makes long-term support planning essential.
Recommandé
Motor and Motion Control
The ADSP-2105BP-55 is suited to legacy motor-control loops that require real-time sampling, transform calculations, current-loop processing, and deterministic execution. The 20 MIPS DSP throughput provides arithmetic capacity for proportional-integral control, filtering, and coordinate transforms, while the enhanced Harvard architecture supports separate instruction and data movement. Its 5 V operation and LCC-68 package align with many older industrial control boards, provided motor-driver timing, isolation, current sensing, and thermal requirements are revalidated.
Recommandé
Test and Measurement Instruments
The ADSP-2105BP-55 can implement signal analysis, waveform generation, digital filtering, and correction algorithms in legacy test and measurement equipment. Its fixed-point architecture and 20 MIPS throughput make it useful for time-domain processing, while its dual data buses improve throughput when computations require simultaneous operand movement. The 68-pin LCC package remains practical for repair-oriented industrial instruments, although obsolete-product sourcing, firmware availability, and calibration reproducibility must be addressed before extending the instrument's service life.
Recommandé
Legacy Audio and Control Interface
The ADSP-2105BP-55 is useful in legacy equipment that bridges digital audio processing with supervisory control and communication functions. A 16-bit processor supports compact fixed-point buffers, and its serial port can interface with converters, transceivers, or peripheral circuits, while the broader system handles configuration and management. The processor's ADSP-2100-family architecture allows reuse of existing firmware routines, but memory mapping, boot procedures, interrupt priorities, and timing must match the original hardware exactly.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADSP-2105BP-55 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADSP-2105BP-55-G | ADSP-2105KP-55 | ADSP-2105BPZ-80 |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | LCC-68 | LCC-68 - same package | LCC-68 - same package | LCC-68 - same package |
| Product Type | 16-bit fixed-point DSP microprocessor | ADSP-2105 family DSP microprocessor | ADSP-2105 family DSP microprocessor | ADSP-2105 family DSP microprocessor |
| Data Bus | 16 bit | 16 bit | 16 bit | 16 bit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Instruction Throughput | 20 MIPS | 20 MIPS | 20 MIPS | 20 MIPS |
| Architecture | Enhanced Harvard three-bus architecture | ADSP-2100 common core | ADSP-2100 common core | ADSP-2100 common core |
| Serial Port Count | 1 serial port | 1 serial port | 1 serial port | 1 serial port |
Principaux différenciateurs
- Exact ADSP-2105BP-55 ordering identity (vs ADSP-2105BP-55-G)
- Known 55-grade designation (vs ADSP-2105BPZ-80)
- Established 16-bit fixed-point DSP architecture (vs ADSP-2105KP-55)
Notes de conception
Do not treat every ADSP-2105 ordering suffix as automatically interchangeable. Verify the complete ordering code, package drawing, operating-temperature grade, clock rating, memory organization, and environmental requirements. The close alternatives share the family architecture and 68-pin format, but the available listings do not expose every electrical distinction needed to prove production equivalence. Obtain the manufacturer ordering table and datasheet before changing a released bill of materials.
Use the manufacturer's ADSP-2105 pin-description table and package drawing when laying out the 68-pin LCC footprint. Confirm every power and ground assignment, clock input, reset, memory interface, serial interface, and no-connect position directly against the selected ordering code. The exact LCC-68 drawing is not represented in the standard page diagram library, so do not infer pad locations from a visually similar leaded package.
Plan the 5 V supply path for both average demand and processor activity during intensive filtering or control calculations. Provide local high-frequency bypass capacitance close to the supply pins, keep return currents short, and isolate switching supplies and inductors from clock and memory lines. Because the processor is obsolete and the precise current limits are not stated on this page, consult the ADSP-2105 datasheet's electrical characteristics before sizing regulators and protection components.
Preserve the original clock routing, memory topology, and termination strategy when repairing or reusing a board. The enhanced Harvard architecture can sustain substantial instruction and data traffic, making compromised clock edges, via stubs, or poor memory-bus returns capable of causing intermittent faults. Route clocks and buses over continuous reference planes, follow the datasheet's timing and layout guidance, and validate signal integrity with the original memory and peripheral configuration.
Treat software migration as part of replacement qualification. ADSP-2100-family code may depend on precise memory addresses, interrupt behavior, timing loops, and linker assumptions. Even when a candidate has the same LCC-68 package and family architecture, verify bootstrap behavior, wait-state requirements, stack placement, peripheral addresses, and interrupt vectors. Execute the existing production test suite before authorizing a substitute for safety- or reliability-sensitive equipment.
Informations de conformité
Analog Devices identifies the ADSP-2105 as obsolete, but the product information does not establish the requested environmental or material-compliance statuses. The -G ordering variant requires separate qualification against its specific manufacturer ordering documentation.
