Analog Devices Inc. ADSP-2187LKSTZ-210

Overview

ADSP-2187LKSTZ-210 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 all instructions in a single 30 ns cycle and supports zero-overhead looping, power-down mode with 100-cycle recovery, and ICE-Port™ emulation for in-system debugging. It is used in real-time audio processing, telecom channel banks, and industrial control loop acceleration.

For engineers reviewing the ADSP-2187LKSTZ-210 datasheet, ADSP-2187LKSTZ-210 pinout, ADSP-2187LKSTZ-210 application, or ADSP-2187LKSTZ-210 equivalent, key selection criteria include instruction cycle time (30 ns), on-chip memory configuration (32 KB total RAM), serial port framing flexibility (3–16 bit word length, µ-law/A-law companding), and low-power operation modes (Power-Down, Idle, Slow Idle).

Technical Context

The ADSP-2187LKSTZ-210 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 dual double-buffered serial ports with hardware companding (CCITT G.711), a 16-bit internal DMA port (IDMA) for host-mode system interfacing, and an 8-bit byte DMA port (BDMA) supporting up to 4 MB external memory. Memory interface supports programmable wait states, full memory mode (14-bit address bus), and host mode (16-bit multiplexed IDMA bus), with mode selected via Mode C pin at reset.

Key Specifications

Pinout & Package

ADSP-2187LKSTZ-210 is housed in a 100-lead thin quad flat pack (TQFP) with 0.5 mm lead pitch and 14 mm × 14 mm body size. Pin functionality is partially multiplexed: external interrupt pins (IRQ2/PF7, IRQL0/PF5, IRQL1/PF6, IRQE/PF4) also serve as programmable I/O flags; SPORT0/SPORT1 pins share functions with IRQ0/IRQ1 and FI/FO when reconfigured via System Control Register.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2187LKSTZ-210, the ADSP-2189MKSTZ-266 delivers 8× faster instruction throughput but mandates layout changes, while the TMS320C549PGE offers mature tooling at the cost of added external components and no native G.711 support.

Availability

ADSP-2187LKSTZ-210 is available at Aetrix Electronics and suitable for voice channel processing, industrial motor control, audio effects processing, and telecom protocol acceleration requiring stable component supply across long-lifecycle embedded programs.

Supply support for ADSP-2187LKSTZ-210 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-21xx family was designed for real-time deterministic signal processing in resource-constrained embedded systems, emphasizing low-latency I/O, on-chip memory integration, and power-efficient operation in battery-powered and thermally sensitive applications.

FAQ

What is the maximum external memory capacity supported by ADSP-2187LKSTZ-210 in Full Memory Mode?

ADSP-2187LKSTZ-210 supports up to 4 MB of external byte memory via its 8-bit BDMA port, and up to 2048 locations of I/O memory space. In Full Memory Mode, it provides 14-bit address lines (A13:0) and 24-bit data bus (D23:0), enabling direct access to external program/data overlays with programmable wait states for slow peripherals.

Does ADSP-2187LKSTZ-210 support hardware-based µ-law and A-law companding?

Yes, ADSP-2187LKSTZ-210 integrates dedicated hardware companding logic in both SPORT0 and SPORT1, compliant with CCITT Recommendation G.711. This enables real-time conversion between linear PCM and logarithmic µ-law/A-law formats without CPU intervention, reducing processing load in voice codec applications.

Can ADSP-2187LKSTZ-210 operate from a crystal oscillator, and what are the requirements?

Yes, ADSP-2187LKSTZ-210 supports crystal operation via CLKIN/XTAL pins. A parallel-resonant, fundamental-frequency, microprocessor-grade crystal (16.67 MHz) must be used with two load capacitors specified by the crystal manufacturer. The internal oscillator automatically stabilizes after ~4096 cycles upon exit from power-down.

How does the power-down mode of ADSP-2187LKSTZ-210 differ from idle mode?

ADSP-2187LKSTZ-210 power-down mode halts the internal clock and reduces supply current to minimum; recovery requires 100 CLKIN cycles. Idle mode maintains clock operation but suspends instruction fetch until interrupt; Slow Idle further divides the clock by 16/32/64/128. Power-down is nonmaskable wake-up capable; Idle is maskable and retains DMA/SPORT activity.

Is ADSP-2187LKSTZ-210 pin-compatible with other ADSP-218x family members like ADSP-2181 or ADSP-2185?

No, ADSP-2187LKSTZ-210 is not pin-compatible with ADSP-2181 or ADSP-2185. While sharing the 100-TQFP package footprint, pin assignments for IDMA signals, SPORT1 multiplexing, and mode select differ. For example, ADSP-2185 uses Mode A/B/C pins as dedicated inputs, whereas ADSP-2187LKSTZ-210 repurposes PF0–PF2 for mode selection only at reset.