Analog Devices Inc. ADSP-2186LBST-160

Overview

ADSP-2186LBST-160 from Analog Devices is a 33 MIPS fixed-point DSP microcomputer with 16K × 24-bit on-chip program RAM, 16K × 16-bit on-chip data RAM, and dual 5-pin synchronous serial ports (SPORT0/SPORT1). It executes all instructions in a single 30 ns cycle and supports zero-overhead looping for real-time audio and telecom signal processing.

For engineers reviewing the ADSP-2186LBST-160 datasheet, ADSP-2186LBST-160 pinout, ADSP-2186LBST-160 application, or ADSP-2186LBST-160 equivalent, key selection criteria include instruction cycle time, on-chip memory configuration, serial port framing flexibility, power-down recovery latency, and ICE-Port™ emulator interface compatibility.

Technical Context

The ADSP-2186LBST-160 implements the ADSP-2100 family 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 subroutine calls in one cycle. Its 3-bus architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - per instruction cycle.

It integrates a 16-bit internal DMA port (IDMA) for transparent access to on-chip RAM, an 8-bit byte DMA port (BDMA) addressing up to 4 MByte external memory, and programmable 16-bit interval timer with prescaler. Serial ports support hardware A-law/µ-law companding per CCITT G.711 and configurable frame sync polarity, pulse width, and word length (3–16 bits).

Key Specifications

Pinout & Package

ADSP-2186LBST-160 is housed in a 100-lead thin quad flat package (TQFP) with 0.5 mm pitch, measuring 14 mm × 14 mm. Pin functionality is multiplexed during RESET (e.g., Mode C/PF2) or software-configurable at runtime (e.g., SPORT1 pins reconfigurable as IRQ0/IRQ1/FI/FO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2186LBST-160, ADSP-2189MKSTZ-160 adds UART emulation capability without changing pinout or memory map, while TMS320C549PGE delivers higher raw MIPS but sacrifices ADSP-2100 family code compatibility and ICE-Port™-based debug simplicity.

Availability

ADSP-2186LBST-160 is available at Aetrix Electronics and suitable for voice recorder systems, telecom line cards, industrial motor controllers, medical ultrasound beamformers, and embedded audio analyzers requiring stable component supply across long-lifecycle industrial programs.

Supply support for ADSP-2186LBST-160 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 is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The ADSP-21xx family was designed for real-time embedded DSP applications demanding deterministic low-latency execution, on-chip memory integration, and hardware-accelerated signal processing functions - particularly in audio, telecom, and industrial control.

FAQ

What is the maximum operating frequency of the ADSP-2186LBST-160?

The ADSP-2186LBST-160 operates with a 30 ns instruction cycle time, corresponding to a 33.3 MHz instruction rate. It accepts a 16.67 MHz external clock on CLKIN or uses an on-chip oscillator with a parallel-resonant crystal. The device does not support frequencies beyond this specification, and exceeding the rated clock violates timing margins for reliable dual-operand fetch and MAC operation.

Does the ADSP-2186LBST-160 support external memory expansion?

Yes, the ADSP-2186LBST-160 supports external memory expansion via its byte DMA port (BDMA), which addresses up to 4 MByte of external RAM or ROM for program overlays and data tables. In Full Memory Mode, it uses A13:A0 and D23:D0 pins for full external bus access; in Host Mode, it uses the 16-bit IDMA port (IAD15:IAD0) for direct on-chip RAM access with limited external addressing.

How many interrupt sources does the ADSP-2186LBST-160 support?

The ADSP-2186LBST-160 supports eleven total interrupt sources: six external (IRQ2, IRQL0, IRQL1, IRQE, plus SPORT1-reconfigured IRQ0/IRQ1) and five internal (timer, SPORT0/SPORT1 transmit/receive, BDMA, power-down). All except power-down and RESET are individually maskable via the IMASK register, and priorities are fixed per vector table starting at 0000H (RESET) down to 0028H (timer).

Can the ADSP-2186LBST-160 execute code directly from external memory?

No, the ADSP-2186LBST-160 cannot execute code directly from external memory. Its program memory is exclusively the 16K × 24-bit on-chip RAM. External memory accessed via BDMA or IDMA is used only for data transfers or program/data overlays loaded into on-chip RAM during boot or runtime - execution always occurs from internal program memory.

Is the ADSP-2186LBST-160 pin-compatible with other ADSP-218x devices?

Yes, the ADSP-2186LBST-160 is pin-compatible with ADSP-2181, ADSP-2185, and ADSP-2189 in the 100-lead TQFP package. All share identical pin assignments for RESET, CLKIN/XTAL, SPORT0/SPORT1, flag pins, memory interface signals, and ICE-Port™. Differences lie in internal features (e.g., boot ROM, UART emulation), not pinout or electrical characteristics.