Analog Devices Inc. ADSP-2186NBSTZ-320

Overview

ADSP-2186NBSTZ-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 serial ports (SPORT0/SPORT1), 8K words × 24-bit on-chip program RAM, and 8K words × 16-bit data RAM - deployed in audio codecs, telecom line cards, and motor control feedback loops.

For engineers reviewing the ADSP-2186NBSTZ-320 datasheet, ADSP-2186NBSTZ-320 pinout, ADSP-2186NBSTZ-320 application, or ADSP-2186NBSTZ-320 equivalent, key selection criteria include its 100-lead LQFP package, 16-bit internal DMA port, byte-DMA support for EPROM booting, and ICE-Port™ debug interface compatibility with final-system emulation.

Technical Context

The ADSP-2186NBSTZ-320 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two dedicated data address generators (DAG1/DAG2), and a zero-overhead program sequencer supporting conditional jumps and nested loops. Its 3-bus Harvard architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - per instruction cycle.

It supports flexible system interfacing via programmable 16-bit internal DMA port, 8-bit byte-DMA port for 4 MB external memory access, and full memory mode with external address/data bus expansion. Boot modes include automatic loading from byte-wide EPROM or host-controlled IDMA initialization, with six configurable external interrupts and ICE-Port™ for in-circuit debugging.

Key Specifications

Pinout & Package

ADSP-2186NBSTZ-320 is housed in a 100-lead LQFP package (BSTZ suffix), measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and 0.5 mm lead pitch. Pin functions are defined per Analog Devices Rev. A datasheet (pages 18–40).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2186NBSTZ-320, ADSP-2185NBSTZ-120 trades raw throughput for cost and memory depth, while ADSP-2188NBSTZ-320 retains identical performance and interface compatibility but scales memory for larger firmware - making both viable alternatives depending on code size and latency constraints.

Availability

ADSP-2186NBSTZ-320 is available at Aetrix Electronics and suitable for voice codec interfaces, motor control feedback loops, audio signal processing modules, and telecom line card baseband processors requiring stable component supply and long-term industrial availability.

Supply support for ADSP-2186NBSTZ-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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.

The ADSP-218xN series was designed as a low-power, code-compatible evolution of the ADSP-2100 family - targeting cost-sensitive, battery-operated, and real-time embedded DSP applications requiring integrated memory and flexible I/O.

FAQ

What is the maximum operating frequency and instruction cycle time of the ADSP-2186NBSTZ-320?

The ADSP-2186NBSTZ-320 operates at a maximum instruction rate of 80 MHz, corresponding to a 12.5 ns instruction cycle time. This is achieved with a 40 MHz external clock input (or crystal) driving the CLKIN pin. The device sustains 80 MIPS performance under typical conditions at 1.8 V core voltage, as confirmed in the Rev. A datasheet's Electrical Characteristics section.

Does the ADSP-2186NBSTZ-320 support automatic booting from external memory?

Yes, the ADSP-2186NBSTZ-320 supports automatic booting from byte-wide external memory such as EPROM. When configured in BDMA boot mode (Mode C = 0, Mode B = 0), it loads the first 32 program memory words from the byte memory space before starting execution. This feature is documented in Table 2 of the Rev. A datasheet and eliminates need for external boot ROM controllers.

What debug interface does the ADSP-2186NBSTZ-320 provide for in-system development?

The ADSP-2186NBSTZ-320 integrates the ICE-Port™ emulator interface, a JTAG-compatible debug port that supports non-intrusive breakpointing, real-time register and memory inspection, and full-speed execution tracing - even in powered final systems. This interface is explicitly referenced in the "SYSTEM INTERFACE FEATURES" section and Figure 1 of the Rev. A datasheet.

How much on-chip memory does the ADSP-2186NBSTZ-320 include, and how is it allocated?

The ADSP-2186NBSTZ-320 includes 8K words × 24-bit on-chip program RAM and 8K words × 16-bit data RAM, totaling 256 Kbits of SRAM. This allocation is fixed per the ADSP-218xN family definition in Table 1 of the Rev. A datasheet and cannot be reconfigured - distinguishing it from higher-memory variants like ADSP-2188N.

Is the ADSP-2186NBSTZ-320 pin-compatible with other ADSP-218xN series devices?

Yes, all ADSP-218xN series members - including ADSP-2186NBSTZ-320 - are fully pin-compatible within the same package option (e.g., 100-lead LQFP). Differences are limited to on-chip memory size and speed grade; pin functions, electrical characteristics, and package dimensions remain identical, as stated in the "GENERAL DESCRIPTION" section of the Rev. A datasheet.