Analog Devices Inc. ADSP-2189MBSTZ-266

Overview

ADSP-2189MBSTZ-266 from Analog Devices is a 75 MIPS fixed-point DSP microcomputer built on the ADSP-2100 base architecture, featuring dual 16-bit serial ports (SPORT0/SPORT1), 32K × 24-bit on-chip program RAM, 48K × 16-bit on-chip data RAM, and a 13.3 ns instruction cycle time at 2.5 V. It targets real-time audio processing, telecom channel coding, and embedded control systems requiring deterministic low-latency execution.

For engineers reviewing the ADSP-2189MBSTZ-266 datasheet, ADSP-2189MBSTZ-266 pinout, ADSP-2189MBSTZ-266 application, or ADSP-2189MBSTZ-266 equivalent, key selection criteria include on-chip memory configuration (32K/48K split), LQFP-100 package compatibility, 2.5 V core voltage operation, ICE-Port™ debug support, and SPORT hardware companding per G.711.

Technical Context

The ADSP-2189MBSTZ-266 implements a three-bus Harvard architecture with independent ALU, MAC, and shifter units enabling single-cycle dual operand fetches and parallel computation. Its program sequencer delivers zero-overhead looping, while two DAGs support circular buffer addressing with automatic modulo arithmetic for FFT and filter kernels.

It integrates a 16-bit internal DMA port (IDMA) and an 8-bit byte DMA port (BDMA) for transparent off-chip memory access up to 4 MByte, plus programmable wait-state generation for interfacing with slow peripherals. Power management includes software/hardware-initiated power-down mode with 200 CLKIN-cycle recovery and Slow Idle with configurable clock divisors (16/32/64/128).

Key Specifications

Pinout & Package

ADSP-2189MBSTZ-266 is housed in a 100-lead LQFP package with 0.5 mm pitch, designed for surface-mount assembly and thermal dissipation in compact embedded systems. Pin functionality includes multiplexed serial port, flag I/O, interrupt, and memory interface signals configured at reset or runtime.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2189MKSTZ-266, the ADSP-2189MBSTZ-266 trades extended temperature tolerance for lower cost in commercial environments; versus TMS320VC5402PGE, it provides faster system integration via on-chip program RAM and hardware companding but at lower peak MIPS.

Availability

ADSP-2189MBSTZ-266 is available at Aetrix Electronics and suitable for voice codec systems, industrial motor controllers, medical ultrasound beamformers, and secure wireless sensor nodes requiring stable component supply across production lifecycles.

Supply support for ADSP-2189MBSTZ-266 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 applications.

The ADSP-21xx family was engineered for deterministic real-time signal processing in resource-constrained embedded systems, emphasizing low-latency I/O, on-chip memory integration, and power-efficient operation.

FAQ

What is the maximum operating frequency and instruction cycle time of the ADSP-2189MBSTZ-266?

The ADSP-2189MBSTZ-266 achieves a 13.3 ns instruction cycle time at 2.5 V core voltage, delivering 75 MIPS sustained performance. This timing is guaranteed under commercial temperature conditions (0°C to +70°C) and requires a 37.5 MHz input clock applied to CLKIN (or crystal across CLKIN/XTAL). The internal instruction clock is derived directly from this source, and all timing parameters-including SPORT, timer, and memory interface-reference this cycle rate.

Does the ADSP-2189MBSTZ-266 support hardware-based A-law and µ-law companding?

Yes, the ADSP-2189MBSTZ-266 integrates dedicated hardware companding logic within both SPORT0 and SPORT1, compliant with CCITT G.711. This allows real-time encoding and decoding of 8-bit compressed audio samples without consuming ALU cycles, significantly reducing firmware overhead in voice processing applications compared to software-only implementations.

How does the ADSP-2189MBSTZ-266 handle external memory interfacing in Full Memory Mode?

In Full Memory Mode (Mode C = 0), the ADSP-2189MBSTZ-266 exposes 14 address lines (A13–A0) and 24 data lines (D23–D0), supporting up to 4 MByte of external byte-wide memory via the BDMA port. Memory select signals (BMS, DMS, PMS, IOMS, CMS) and control lines (RD, WR) enable glueless connection to EPROM, SRAM, or peripheral devices with programmable wait-state insertion for timing compliance.

What debug capabilities does the ADSP-2189MBSTZ-266 provide through its ICE-Port™ interface?

The ADSP-2189MBSTZ-266 features a 14-pin ICE-Port™ interface that supports full in-circuit emulation without removing the device from the target board. It enables breakpoint setting (up to 20), single-step or full-speed execution, real-time register and memory inspection/modification, PC upload/download, and C source-level debugging-all while the system runs in its final hardware configuration.

Can the ADSP-2189MBSTZ-266 operate with both 2.5 V and 3.3 V I/O interfaces?

Yes, the ADSP-2189MBSTZ-266 supports flexible I/O voltage operation: its core logic runs at 2.5 V (VDDEXT and VDDINT), while all input pins tolerate up to 3.6 V regardless of supply voltage. This allows direct interfacing with 3.3 V peripherals without level shifters, simplifying system design in mixed-voltage environments such as industrial control panels with legacy 3.3 V sensors and actuators.