Analog Devices Inc. ADSP-2189NKST-320

Overview

ADSP-2189NKST-320 from Analog Devices is a 16-bit fixed-point DSP microcomputer optimized for real-time signal processing in embedded systems. It delivers 80 MIPS sustained performance at 12.5 ns instruction cycle time (1.8 V core), features 32K words of on-chip program RAM and 48K words of data RAM, and integrates dual serial ports, 16-bit internal DMA port, and programmable 16-bit interval timer - deployed in audio codecs, telecom line cards, and industrial motor control.

For engineers reviewing the ADSP-2189NKST-320 datasheet, ADSP-2189NKST-320 pinout, ADSP-2189NKST-320 application, or ADSP-2189NKST-320 equivalent, key selection criteria include on-chip memory configuration (32K/48K), LQFP-100 package compatibility, 1.8 V core voltage operation, and ICE-Port™ debug interface support for in-system validation.

Technical Context

The ADSP-2189NKST-320 implements the ADSP-2100 family base architecture with three independent computational units (ALU, MAC, shifter), two dedicated data address generators (DAGs), and zero-overhead looping via hardware loop stack. Its 3-bus architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - in every instruction cycle.

It supports full memory mode and host mode booting via byte DMA or internal DMA port, with flexible I/O voltage tolerance (1.8 V/2.5 V/3.3 V) and all inputs rated to 3.6 V. Power management includes hardware/software-initiated power-down (200 CLKIN-cycle recovery), idle, and slow-idle modes with programmable clock divisors (16/32/64/128).

Key Specifications

Pinout & Package

ADSP-2189NKST-320 is housed in a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Analog Devices ADSP-218xN Rev. A datasheet, Section "LQFP Package Pinout" (Page 40).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2189NKST-320, ADSP-2188NKST-320 offers greater on-chip memory but identical pinout and power profile, while TMS320VC5402PGE provides TI ecosystem alignment at the cost of missing integrated serial features and debug infrastructure.

Availability

ADSP-2189NKST-320 is available at Aetrix Electronics and suitable for audio signal processing, telecom line card design, and industrial motor control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ADSP-2189NKST-320 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.

The ADSP-218xN series was designed as a low-power, code-compatible evolution of the ADSP-2100 family - targeting cost-sensitive, battery-operated, and real-time embedded DSP applications requiring integrated memory and serial interfaces.

FAQ

What is the maximum operating frequency and instruction cycle time of the ADSP-2189NKST-320?

The ADSP-2189NKST-320 operates at a 12.5 ns instruction cycle time, delivering 80 MIPS sustained performance. This is achieved with a 40 MHz external clock input (CLKIN), which the internal PLL doubles to generate the core instruction clock. The device maintains this timing under 1.8 V core supply and specified temperature conditions per Analog Devices ADSP-218xN Rev. A datasheet Section "Timing Specifications".

Does the ADSP-2189NKST-320 support hardware-based audio companding?

Yes, the ADSP-2189NKST-320 supports A-law and μ-law companding in hardware per CCITT Recommendation G.711, implemented within its dual SPORT peripherals. This offloads CPU cycles during PCM voice encoding/decoding and is confirmed in the "Serial Ports" section of the ADSP-218xN Rev. A datasheet (Page 4). No external codec or software library is required for standard telephony companding.

What package type and pin count does the ADSP-2189NKST-320 use?

The ADSP-2189NKST-320 uses a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad, as documented in the "Outline Dimensions" section (Page 45) and "LQFP Package Pinout" (Page 40) of the ADSP-218xN Rev. A datasheet. It is Pb-free and RoHS-compliant, and shares pin compatibility with other ADSP-218xN series members.

Can the ADSP-2189NKST-320 boot directly from external byte-wide memory?

Yes, the ADSP-2189NKST-320 supports automatic booting from byte-wide external memory (e.g., EPROM) using its Byte DMA (BDMA) port. When configured in Mode C = 0, Mode A = 0 (Full Memory Mode), it loads the first 32 program memory words from byte memory space before starting execution - detailed in Table 2 ("Modes of Operation") of the ADSP-218xN Rev. A datasheet (Page 5).

What debug interface does the ADSP-2189NKST-320 provide for in-system development?

The ADSP-2189NKST-320 includes the ICE-Port™ emulator interface, a proprietary Analog Devices debug port supporting real-time in-circuit emulation, breakpoint insertion, and memory/register inspection without halting system clocks. This interface is fully supported by VisualDSP++ development tools and is referenced in the "Development System" section (Page 15) and functional block diagram (Page 2) of the ADSP-218xN Rev. A datasheet.