Analog Devices Inc. ADSP-2186NKSTZ-320

Overview

ADSP-2186NKSTZ-320 from Analog Devices is a 16-bit fixed-point DSP microcomputer optimized for real-time signal processing in embedded systems. It delivers 80 MIPS sustained performance at 12.5 ns instruction cycle time (1.8 V core), features dual 16-bit synchronous serial ports (SPORT0/SPORT1), 8K words × 24-bit on-chip program RAM, and 8K words × 16-bit on-chip data RAM - deployed in audio codecs, telecom line cards, and industrial motor control.

For engineers reviewing the ADSP-2186NKSTZ-320 datasheet, ADSP-2186NKSTZ-320 pinout, ADSP-2186NKSTZ-320 application, or ADSP-2186NKSTZ-320 equivalent, key selection criteria include its 100-lead LQFP package, 1.8 V core supply with 3.3 V I/O tolerance, zero-overhead looping capability, internal DMA port for high-speed memory access, and ICE-Port™ debug interface support in final-system environments.

Technical Context

The ADSP-2186NKSTZ-320 implements the ADSP-2100 base architecture with three independent computational units: ALU, 40-bit MAC, and barrel shifter - all interconnected via the Result (R) bus for single-cycle operand chaining. Its two dedicated DAGs enable simultaneous dual-operand fetches from program and data memory in every instruction cycle.

It supports full memory mode with external address/data buses (A0–A21, D0–D23), programmable wait states, and flexible boot options including byte-DMA loading from EPROM or host-mode IDMA initialization. Serial port framing, companding (A-law/μ-law), and multichannel TDM support are hardware-accelerated per CCITT G.711.

Key Specifications

Pinout & Package

ADSP-2186NKSTZ-320 is housed in a 100-lead LQFP package (Pb-free, RoHS-compliant). Pin functions are defined per Analog Devices ADSP-218xN Rev. A datasheet, with dedicated pins for dual SPORTs, 16-bit IDMA, byte-DMA, timer, flag I/O, and mode configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSP microcomputer applications.

Compared with ADSP-2186NKSTZ-320, ADSP-2185NKSTZ-320 offers double on-chip memory without layout changes, while TMS320VC5402PGE provides TI ecosystem alignment at the cost of lost hardware acceleration for voice and TDM tasks.

Availability

ADSP-2186NKSTZ-320 is available at Aetrix Electronics and suitable for voice codec systems, industrial motor controllers, and telecom line cards requiring stable component supply across extended production lifecycles.

Supply support for ADSP-2186NKSTZ-320 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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The ADSP-218xN series was designed for cost-sensitive, low-power embedded DSP applications demanding real-time determinism, integrated memory, and hardware-accelerated I/O - targeting audio, telecom, and industrial control markets.

FAQ

What is the maximum operating frequency and instruction throughput of the ADSP-2186NKSTZ-320?

The ADSP-2186NKSTZ-320 operates at a 12.5 ns instruction cycle time, delivering 80 MIPS sustained performance. This is achieved with a 40 MHz external clock input (CLKIN), which the internal circuitry doubles to generate the 80 MHz instruction clock. All instructions execute in a single cycle, and the processor supports zero-overhead looping for deterministic real-time execution. The ADSP-2186NKSTZ-320 maintains this throughput under 1.8 V core supply with full functionality across its specified temperature range.

Does the ADSP-2186NKSTZ-320 support hardware-based audio companding, and if so, which standards?

Yes, the ADSP-2186NKSTZ-320 integrates hardware companding in both SPORT0 and SPORT1, compliant with CCITT Recommendation G.711 for A-law and μ-law encoding/decoding. This offloads the CPU from real-time compression tasks in voice applications, reducing processing load by up to 30% compared to software-only implementations. The companding logic operates transparently during serial data transfers and is configurable per-port via control registers in the ADSP-2186NKSTZ-320's memory-mapped I/O space.

What boot methods does the ADSP-2186NKSTZ-320 support, and how is boot mode selected?

The ADSP-2186NKSTZ-320 supports multiple boot methods: automatic byte-DMA loading from EPROM, host-mode IDMA initialization, or direct execution from external memory. Boot mode is selected at reset via the Mode A–D pins (PF0–PF3), with specific combinations defining Full Memory Mode, Host Mode, or BDMA-assisted startup. For example, Mode C = 1 and Mode D = 0 configures Host Mode with active-pull-down IACK, enabling external hosts to write to internal program memory before execution begins - a feature critical for secure firmware updates in the ADSP-2186NKSTZ-320.

Can the ADSP-2186NKSTZ-320 operate with mixed voltage interfaces, and what are the I/O voltage tolerances?

Yes, the ADSP-2186NKSTZ-320 supports flexible I/O operation at 1.8 V, 2.5 V, or 3.3 V levels, with all digital inputs tolerant up to 3.6 V regardless of supply configuration. This allows direct interfacing with legacy 3.3 V peripherals without level shifters. The core logic runs at 1.8 V for low power, while I/O banks maintain compatibility with higher-voltage system components - a key design advantage in mixed-signal industrial and telecom equipment where the ADSP-2186NKSTZ-320 is commonly deployed.

Is the ADSP-2186NKSTZ-320 pin-compatible with other members of the ADSP-218xN family, and what does that mean for design reuse?

Yes, all ADSP-218xN series devices, including the ADSP-2186NKSTZ-320, are fully pin-compatible in the 100-lead LQFP package. This means identical PCB footprints, power delivery networks, and signal routing can be reused across variants like ADSP-2185N (16K/16K RAM) or ADSP-2189N (32K/48K RAM). Firmware remains binary-compatible due to ADSP-2100 instruction set consistency, enabling scalable memory allocation without hardware revision - a core benefit explicitly documented for the ADSP-2186NKSTZ-320 in Analog Devices' ordering guide and family datasheet.