Analog Devices Inc. ADSP-2187LBSTZ-160

Overview

ADSP-2187LBSTZ-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 16-bit synchronous serial ports (SPORT0/SPORT1). It executes instructions in 30 ns cycles, supports zero-overhead looping, and integrates power-down mode with 100-cycle wake-up-used in real-time audio processing, telecom channel banks, and industrial motor control systems.

For engineers reviewing the ADSP-2187LBSTZ-160 datasheet, ADSP-2187LBSTZ-160 pinout, ADSP-2187LBSTZ-160 application, or ADSP-2187LBSTZ-160 equivalent, key selection criteria include instruction cycle time, on-chip memory configuration, serial port framing flexibility, power-down recovery latency, and ICE-Port™ debug interface compatibility.

Technical Context

The ADSP-2187LBSTZ-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-within every instruction cycle.

It features two double-buffered serial ports with hardware companding (A-law/µ-law per CCITT G.711), programmable 16-bit interval timer with prescaler, and flexible interrupt handling including six external interrupts (IRQ0–IRQ2, IRQL0/IRQL1, IRQE) plus internal sources (timer, SPORTs, BDMA). Memory interface supports Full Memory Mode (14-bit address, 24-bit data) or Host Mode (16-bit IDMA bus).

Key Specifications

Pinout & Package

ADSP-2187LBSTZ-160 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, thermally enhanced for embedded DSP applications requiring compact board layout and moderate power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2187LBSTZ-160, ADSP-2189MKSTZ-160 offers extended thermal range without design changes, while ADSP-2186MKBZ-160 doubles on-chip memory at the cost of non-pin-compatible packaging and higher power consumption.

Availability

ADSP-2187LBSTZ-160 is available at Aetrix Electronics and suitable for voice channel processing, industrial motor control, telecom line cards, and audio effects processors requiring stable component supply across production lifecycles.

Supply support for ADSP-2187LBSTZ-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 global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.

The ADSP-21xx family-including ADSP-2187LBSTZ-160-is designed for real-time embedded DSP applications demanding deterministic low-latency execution, integrated memory, and robust system interface flexibility in space-constrained environments.

FAQ

What is the maximum operating frequency and instruction cycle time of the ADSP-2187LBSTZ-160?

The ADSP-2187LBSTZ-160 operates with a 30 ns instruction cycle time, corresponding to a 33.3 MHz instruction rate. This is achieved using a 16.67 MHz external clock applied to CLKIN (or a 16.67 MHz crystal across CLKIN/XTAL). The device sustains 33 MIPS performance with single-cycle instruction execution and no pipeline stalls for most operations.

Does the ADSP-2187LBSTZ-160 support hardware companding, and if so, which standards?

Yes, the ADSP-2187LBSTZ-160 supports hardware A-law and µ-law companding in both SPORT0 and SPORT1, compliant with CCITT Recommendation G.711. This enables direct PCM-to-logarithmic conversion for telephony interfaces without consuming CPU cycles or external components.

How does the power-down mode function in the ADSP-2187LBSTZ-160, and what is its wake-up latency?

The ADSP-2187LBSTZ-160 enters power-down mode via PWD pin assertion or software command, reducing current draw significantly. It resumes execution in exactly 100 CLKIN cycles-deterministic and independent of clock source (crystal or external). PWDACK pin signals confirmed entry into the low-power state for system-level coordination.

Is the ADSP-2187LBSTZ-160 pin-compatible with other ADSP-218x series devices?

ADSP-2187LBSTZ-160 shares the same 100-lead TQFP package and pinout with ADSP-2185, ADSP-2186, and ADSP-2189 variants. However, differences in memory size, temperature grade, and feature enablement (e.g., SPORT configuration bits) require firmware validation-even though hardware replacement is mechanically feasible.

What debug interface does the ADSP-2187LBSTZ-160 provide, and what tools support it?

The ADSP-2187LBSTZ-160 integrates an ICE-Port™ 14-pin emulation interface supporting in-circuit debugging with EZ-ICE® hardware. It enables breakpoint setting, register/memory inspection, single-stepping, and C-source-level debugging via ADSP-2100 Family Development Tools-including VisualDSP++ and legacy ADSP-21xx EZ-KIT Lite platforms.