Analog Devices Inc. ADSP-2186NKCA-320

Overview

ADSP-2186NKCA-320 from Analog Devices is a 16-bit fixed-point DSP microcomputer optimized for real-time signal processing in embedded audio, telecom, and industrial control systems. It delivers 80 MIPS sustained performance at 12.5 ns instruction cycle time (1.8 V core), features 8K words of on-chip program RAM and 8K words of data RAM, and integrates dual serial ports, 16-bit internal DMA port, and programmable 16-bit interval timer.

For engineers reviewing the ADSP-2186NKCA-320 datasheet, ADSP-2186NKCA-320 pinout, ADSP-2186NKCA-320 application, or ADSP-2186NKCA-320 equivalent, key selection considerations include on-chip memory configuration (8K/8K), LQFP-100 package compatibility, 1.8 V core voltage operation, dual SPORT interface timing, and power-down recovery latency of 200 CLKIN cycles.

Technical Context

The ADSP-2186NKCA-320 implements the ADSP-2100 base architecture with three independent computational units - ALU, 40-bit MAC, and barrel shifter - enabling single-cycle multiply-add, logical/arithmetic shifts, and zero-overhead looping via dedicated program sequencer and two DAGs. Its 3-bus Harvard architecture supports simultaneous dual operand fetches per instruction cycle.

It supports flexible system interfacing via 16-bit internal DMA port (IDMA), byte-wide BDMA port for 4 MB external memory access, programmable wait states, and full memory/host mode selection via Mode A–D pins. Serial ports SPORT0 and SPORT1 provide hardware companding (A-law/μ-law), frame-synchronized I/O, and UART emulation capability.

Key Specifications

Pinout & Package

ADSP-2186NKCA-320 is housed in a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across six functional groups: memory interface (PMA/PMD/DMA/DMD buses), serial I/O (SPORT0/SPORT1 signals), programmable flags (PF0–PF7), timer and interrupt controls (IRQ0–IRQ2, IRQL0/1, IRQE), power/ground (VDD, VSS, AVDD, AVSS), and system control (RESET, PWD, PWDACK, CLKIN, XTAL, CLKOUT).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-point DSP applications.

Compared with ADSP-2186NKCA-320, ADSP-2185NKCA-320 offers doubled on-chip memory with zero layout or software changes, while TMS320VC5402PGE trades hardware companding and ADSP-2100 code compatibility for integrated ROM and broader third-party tool support - making it suitable only where memory constraints dominate over real-time signal processing efficiency.

Availability

ADSP-2186NKCA-320 is available at Aetrix Electronics and suitable for voice processing terminals, industrial motor controllers, and telecom line cards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant LQFP packaging.

Supply support for ADSP-2186NKCA-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 for precision instrumentation, communications, and industrial applications.

The ADSP-218xN series was designed to deliver cost-effective, low-power fixed-point DSP performance for real-time embedded signal processing in battery-powered and space-constrained systems - emphasizing memory integration, flexible I/O, and deterministic low-latency execution.

FAQ

What is the core supply voltage requirement for ADSP-2186NKCA-320?

The ADSP-2186NKCA-320 operates with a nominal core supply voltage of 1.8 V ± 0.1 V (VDD). Its I/O pins tolerate up to 3.6 V regardless of VDD level, enabling direct interfacing with 3.3 V peripherals without level shifters. This 1.8 V core design reduces dynamic power consumption while sustaining 80 MIPS performance, and is verified in the device's Recommended Operating Conditions table.

Does ADSP-2186NKCA-320 support hardware-based A-law and μ-law companding?

Yes, ADSP-2186NKCA-320 integrates dedicated hardware companding logic within both SPORT0 and SPORT1, compliant with CCITT G.711. This allows real-time encoding and decoding of 8-bit compressed audio samples without CPU intervention, reducing instruction overhead by up to 30% in voice codec implementations compared to software-based approaches.

What is the minimum wake-up time from power-down mode for ADSP-2186NKCA-320?

The ADSP-2186NKCA-320 recovers from hardware- or software-initiated power-down mode in exactly 200 CLKIN cycles. With a 40 MHz CLKIN (2× instruction rate), this equates to 5 μs latency before instruction execution resumes - a critical specification for battery-powered systems requiring rapid response to external events like ring detection or sensor triggers.

Can ADSP-2186NKCA-320 boot directly from external byte-wide memory?

Yes, ADSP-2186NKCA-320 supports automatic booting from external byte-wide memory (e.g., EPROM) using its BDMA port. When configured in Mode C = 0, Mode A = 0 (Full Memory Mode), the device loads the first 32 program memory words from byte memory space before beginning execution - a feature confirmed in the Booting Method section of the ADSP-218xN datasheet Rev. A.

Is ADSP-2186NKCA-320 pin-compatible with other ADSP-218xN family members?

Yes, ADSP-2186NKCA-320 is fully pin-compatible with all ADSP-218xN series devices including ADSP-2184N, ADSP-2185N, ADSP-2187N, ADSP-2188N, and ADSP-2189N. This uniformity across the family - documented in the General Description section - allows hardware reuse and firmware scalability based solely on on-chip memory size differences, with no PCB redesign required.