Analog Devices Inc. ADSP-2186LBST-133

Overview

ADSP-2186LBST-133 from Analog Devices is a 33 MIPS fixed-point DSP microcomputer optimized for real-time audio, telecom, and industrial control applications. It features a 30 ns instruction cycle time, 16K × 24-bit on-chip program RAM, 16K × 16-bit on-chip data RAM, dual SPORTs with hardware companding, and ICE-Port™ emulation support. The device executes single-cycle instructions and supports zero-overhead looping in embedded signal processing systems.

For engineers reviewing the ADSP-2186LBST-133 datasheet, ADSP-2186LBST-133 pinout, ADSP-2186LBST-133 application, or ADSP-2186LBST-133 equivalent, key selection criteria include its 100-pin TQFP package, 33 MHz sustained performance, dual serial port timing flexibility, low-power power-down mode with 100-cycle recovery, and ADSP-2100 family code compatibility for legacy migration.

Technical Context

The ADSP-2186LBST-133 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two dedicated data address generators (DAGs), and a zero-overhead program sequencer. Its 3-bus architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - per instruction cycle.

It integrates dual double-buffered synchronous serial ports (SPORT0/SPORT1) supporting 3–16-bit word lengths, A-law/µ-law companding per CCITT G.711, and configurable framing. System interface includes a 16-bit internal DMA port (host mode), byte DMA port for 4 MB external memory access, and programmable 16-bit interval timer with prescaler.

Key Specifications

Pinout & Package

ADSP-2186LBST-133 is housed in a 100-lead thin quad flat pack (TQFP) with 0.5 mm lead pitch, thermally enhanced for industrial ambient operation. Pin functionality is multiplexed across memory interface, serial I/O, flag I/O, and system control domains, configured at reset (mode pins) or runtime (SPORT/flag software reconfiguration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2186LBST-133, ADSP-2185KS-133 offers identical performance and feature set but lacks extended temperature qualification, while TMS320C549PGE trades integration and low-power efficiency for higher peak throughput and TI toolchain support - neither is pin-compatible or drop-in replaceable.

Availability

ADSP-2186LBST-133 is available at Aetrix Electronics and suitable for voice communications terminals, digital audio processing systems, industrial motor control drives, and medical ultrasound beamformers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADSP-2186LBST-133 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The ADSP-21xx family was designed specifically for embedded real-time signal processing in resource-constrained systems where deterministic latency, low power, and on-chip memory integration are critical - targeting audio, telecom, and industrial control markets.

FAQ

What is the maximum operating frequency and instruction throughput of the ADSP-2186LBST-133?

The ADSP-2186LBST-133 operates with a 30 ns instruction cycle time, delivering 33 million instructions per second (MIPS) sustained throughput. This is achieved using a 16.67 MHz external clock or crystal input, which the internal PLL doubles to generate the 33 MHz core timing reference. All instructions - including ALU, MAC, and shifter operations - execute in a single cycle, ensuring deterministic real-time performance for time-critical DSP tasks.

Does the ADSP-2186LBST-133 support in-circuit debugging without removing the chip from the target board?

Yes, the ADSP-2186LBST-133 integrates on-chip emulation support via the 14-pin ICE-Port™ interface. This allows full in-target debugging - including breakpoint setting, register/memory inspection, single-stepping, and C source-level debugging - without removing the device from the PCB or modifying the target system layout. The EZ-ICE® emulator connects directly to this port, enabling non-intrusive development and validation in final hardware configurations.

How does the ADSP-2186LBST-133 manage power in battery-operated equipment?

The ADSP-2186LBST-133 provides three low-power modes: Power-Down (sub-mW standby with 100-cycle wake-up), Idle (clock-gated wait state), and Slow Idle (programmable clock divisor of 16/32/64/128). Power-down is initiated via the PWD pin or software command and preserves all register and memory contents. PWDACK confirms entry into dormant state, enabling coordinated system-level power sequencing for portable medical or audio devices.

Can the ADSP-2186LBST-133 boot directly from external memory without external logic?

Yes, the ADSP-2186LBST-133 supports automatic booting from byte-wide external memory (e.g., EPROM or flash) through its built-in boot ROM. Upon reset, it loads the first 32 words from external memory into on-chip program RAM and begins execution. This "glueless" boot process requires no external address latches or glue logic, simplifying system design for cost-sensitive applications like consumer audio products.

What memory resources are integrated on the ADSP-2186LBST-133 die?

The ADSP-2186LBST-133 integrates 80 KB of on-chip RAM: 16K × 24-bit program memory (for instructions and constants) and 16K × 16-bit data memory (for variables, buffers, and coefficients). Both memories are SRAM-based, providing zero-wait-state access. The program memory is dual-purpose and can store data overlays, eliminating external bus contention during real-time processing - a key advantage over external-memory-dependent DSPs.