ADSP-2104KP-80 16-Bit 20 MHz DSP | Analog Devices
MPN: ADSP-2104KP-80 ✓ ActiveADSP-2104KP-80 Overview
A digital signal processor, or DSP, is a semiconductor optimized to execute repetitive mathematical operations on sampled data. Unlike a general-purpose microprocessor, a DSP typically uses a highly regular execution architecture, multipliers, accumulators, and parallel data paths to complete filtering, correlation, Fourier-transform-related, and modulation tasks efficiently. Within the product hierarchy, the ADSP-2104 is a DSP, a specialized microprocessor, an embedded processor, and ultimately an integrated circuit used for real-time signal processing.
The ADSP-2104KP-80 combines a 16-bit fixed-point arithmetic format with a 20 MHz clock and 20 MIPS processing capability. Its fixed-point architecture is particularly useful for control loops, audio processing, communications filtering, and other workloads in which each operation must execute predictably. The processor's dedicated peripherals reduce the need for separate support logic in applications requiring real-time sampling, serial data transfer, timing, and event-driven control.
The ADSP-2104 and ADSP-2109 processors use a common core, according to the Analog Devices product documentation. This common-core architecture supports code-development techniques across the family while allowing selection of a device according to memory, interface, packaging, and application requirements. The fixed-point format also simplifies implementation when scaling and overflow behavior can be managed explicitly in the system design.
Typical applications include digital audio filtering, communications-channel processing, industrial motor and signal control, vibration analysis, waveform generation, and embedded instrumentation. The processor is particularly relevant where deterministic arithmetic and dedicated signal-processing resources are more important than a general-purpose instruction set. Companion devices from the same processor family can support different memory capacities, package options, or peripheral configurations when the application evolves.
For a new design, verify the clock source, memory interface, serial peripheral configuration, pin multiplexing, and package-level routing before layout release. The ADSP-2104KP-80 uses a 68-pin PLCC package, so its footprint differs from newer leadless and fine-pitch packages; confirm that the mechanical outline, exposed connections, and thermal environment match the board assembly process. Use the manufacturer pin-description table when assigning tracks and designing the power and ground distribution network.
This product page combines the manufacturer's processor description with a practical engineering perspective: identified performance characteristics, application guidance, design considerations, package limitations, and a transparent assessment of drop-in replacement availability. It is intended to accelerate initial component selection while keeping final schematic, layout, firmware, and lifecycle decisions tied to the official Analog Devices documentation.
Drop-in alternatives for ADSP-2104KP-80 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesADSP-2104KP-80 Specifications
| Product Type | Single-chip digital signal processor |
| Architecture | Fixed-point digital signal processor |
| Word Length | 16 bit |
| Clock Frequency | 20 MHz |
| Processing Speed | 20 MIPS |
| Package | 68-pin PLCC |
| Package Designation | LCC-68 |
| Mounting Type | Surface mount |
| Core Relationship | Common core with ADSP-2109 |
| Application Class | High-speed numeric processing |
ADSP-2104KP-80 lcc-68 Pin Configuration Guide
Pin configuration for ADSP-2104KP-80 (lcc-68 package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADSP-2104KP-80.
Refer to the datasheet for full pin configuration.
Typical Applications
ADSP-2104KP-80 is suitable for 6 applications: Digital Audio Filtering, Communications Channel Processing, Industrial Motor and Signal Control, Vibration and Condition Monitoring, Waveform Generation and Measurement, Legacy Signal-Processing Platform.
Digital Audio Filtering
The ADSP-2104KP-80 is appropriate for real-time digital audio filters that benefit from its 16-bit fixed-point arithmetic, 20 MHz clock, and 20 MIPS processing capability. It can execute multiply-accumulate operations used in low-pass, high-pass, notch, equalization, and dynamic-filter structures without the overhead of a general-purpose control loop. Place the processor where the selected serial interface can exchange PCM or control data efficiently, and account for coefficient quantization and filter-state scaling during firmware development. The 68-pin PLCC footprint also makes the device suitable for legacy or long-life audio equipment where an existing board can be retained. Before committing the design, verify the required sampling rate, serial-interface timing, supported word lengths, and electrical operating limits in the manufacturer documentation.
Recommended
Communications Channel Processing
The ADSP-2104KP-80 can support communications-channel functions such as digital filtering, gain control, correlation, and data conditioning where predictable fixed-point execution is valuable. Its 20 MIPS throughput provides a defined budget for processing samples across one or more synchronized channels, depending on algorithm complexity. Serial links can connect the processor to converters, codecs, or network-facing conversion stages, but their electrical modes and timing must be checked against the selected peripheral configuration. Fixed-point designers should define scaling and saturation rules early, because overflow behavior can affect intelligibility or signal integrity. For high-volume communications equipment, validate channel delay, throughput under simultaneous operations, clock tolerance, and recovery behavior before production release.
Recommended
Industrial Motor and Signal Control
The ADSP-2104KP-80 is suitable for industrial systems that combine sampled-signal analysis with a deterministic control function. Its DSP-oriented execution path can process position, current, vibration, or acoustic measurements, while the 20 MHz clock supports time-sensitive arithmetic when the loop schedule fits the available instruction budget. Use the processor's timers and serial peripherals to establish acquisition timing and communicate with sensors or actuators. Design the analog front end and protection network independently from the digital algorithm because sensor noise, input range, and isolation requirements can dominate overall accuracy. Qualification for an industrial environment must cover the required temperature range, supply tolerance, EMC design, and long-term component-availability needs before the processor is approved for production hardware.
Recommended
Vibration and Condition Monitoring
The ADSP-2104KP-80 can support vibration analysis, envelope detection, filtering, and alarm processing in condition-monitoring equipment. Its 16-bit fixed-point architecture is suitable for deterministic sampled-data algorithms, while the 20 MIPS rate allows several filtering or spectral-estimation stages to share a processing budget. Synchronize acquisition clocks carefully so multiple sensor channels remain phase-aligned, and select decimation and anti-alias filters based on the target vibration bandwidth. Scaling must preserve low-level signals during amplification while preventing overflow in heavily loaded events. A compact industrial installation can use the 68-pin PLCC package on a multilayer board, although thermal performance and solder-joint inspection should be addressed carefully because PLCC leads can be difficult to inspect or rework after assembly.
Recommended
Waveform Generation and Measurement
The ADSP-2104KP-80 is applicable to waveform-generation and test systems that require deterministic arithmetic rather than a general-purpose host processor. Sine, triangle, arbitrary-wave, pulse, and compensation algorithms can be implemented with fixed-point routines while timers establish repeatable update intervals. Its 20 MIPS processing capability provides a concrete basis for estimating sample throughput and computational overhead. When driving external converters, align the processor's serial timing with the converter interface and validate the output latency and jitter requirements. For laboratory instrumentation, separate analog calibration from the DSP algorithm and include sufficient external memory for tables or captured traces. Confirm available memory and peripheral resources in the manufacturer documentation before selecting buffer sizes, symbol-table support, and capture features.
Recommended
Legacy Signal-Processing Platform
The ADSP-2104KP-80 is especially practical for maintaining an existing 68-pin PLCC signal-processing platform whose firmware and board layout already depend on the ADSP-2104 architecture. Its listed active status supports efforts to extend product life without redesigning the processor footprint or rewriting a mature algorithm library. Engineers should still audit memory assumptions, peripheral assignments, clock settings, and toolchain compatibility because the final orderable suffix determines the supported operating configuration. Repair and obsolescence programs also require counterfeit-risk controls, date-code review, and traceability procedures. Using this device in a legacy platform is preferable when the cost and schedule of revalidation exceed the benefits of migration; a newer SHARC-class processor should instead be considered when performance, memory, or package modernization has clear value.
Recommended
Recommended Products Summary
Engineering reference data for ADSP-2104KP-80 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 68-pin PLCC (LCC-68) |
| Brand | Analog Devices |
| Processor Type | Fixed-point digital signal processor |
| Word Length | 16 bit |
| Clock Frequency | 20 MHz |
| Processing Speed | 20 MIPS |
| Core Relationship | ADSP-2104 and ADSP-2109 use a common core |
| Optimization | Digital signal processing and high-speed numeric processing |
Key Differentiators
- Maintains a legacy fixed-point processor platform in a 68-pin PLCC package (vs ADSP-21060LKSZ-160)
- Targets real-time signal processing with a defined arithmetic throughput (vs ADSP-2109)
- Supports preservation of established ADSP-2104 software and board investments (vs ADSP-21060LKSZ-160)
Design Notes
Treat the 68-pin PLCC land pattern as a legacy-style surface-mount design constraint. Confirm pin-one orientation, lead pitch, package outline, solder-joint geometry, and courtyard clearance against the official package drawing. Maintain adequate spacing from tall connectors and enclosure walls so every lead remains visible and accessible for inspection. If the design will require manual rework, consider whether a connector or a leaded package would provide a lower assembly risk even though it changes the original board architecture.
Create separate, low-impedance routes for the processor's supply and ground connections, following the pin and decoupling assignments in the manufacturer documentation. Place high-frequency bypass capacitors at the relevant supply pins and add bulk capacitance near the power entry point. Do not determine copper width from clock frequency alone; base the calculation on total converted supply current, acceptable voltage drop, temperature rise, and the board fabrication capability.
Route clock, reset, and high-speed serial signals away from noisy switching nodes and analog inputs. Keep the clock source path short and use a deliberate ground reference beneath critical signals where the board stack-up permits. Programmable peripheral multiplexing means the function of a given pin can depend on device configuration, so verify every signal assignment in the pin-description table rather than inferring it from an older board schematic.
Do not treat the ADSP-2104KP-80 as interchangeable with the ADSP-2109 or ADSP-21060LKSZ-160 merely because all are digital signal processors. The devices differ in package, architecture, memory organization, and peripheral environment. Also avoid confusing a common processor core with a pin-compatible orderable part. For a production migration, compare clock behavior, memory map, interrupt vectoring, linker support, peripheral registers, and board-level connectivity before replacing the component.
Compliance Information
Compliance status must be confirmed from the exact orderable-device documentation or a current manufacturer declaration.