Analog Devices Inc. ADSP-2188NKSTZ-320

Overview

ADSP-2188NKSTZ-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 48K words × 24-bit on-chip program RAM and 56K words × 16-bit data RAM, and supports dual serial ports with hardware companding for voice-grade audio applications.

For engineers reviewing the ADSP-2188NKSTZ-320 datasheet, ADSP-2188NKSTZ-320 pinout, ADSP-2188NKSTZ-320 application, or ADSP-2188NKSTZ-320 equivalent, key selection criteria include on-chip memory configuration, 100-lead LQFP package compatibility, ICE-Port™ debug support, and boot-from-byte-memory capability via BDMA port.

Technical Context

The ADSP-2188NKSTZ-320 implements the ADSP-2100 family 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 Harvard architecture enables simultaneous dual operand fetches-e.g., one from program memory and one from data memory-in every instruction cycle.

It integrates flexible system interfaces including a 16-bit internal DMA port, byte-wide DMA controller supporting up to 4 MB external memory, programmable 16-bit interval timer with prescaler, and two double-buffered serial ports (SPORT0/SPORT1) with configurable framing, 3–16-bit word lengths, and A-law/μ-law companding per CCITT G.711.

Key Specifications

Pinout & Package

The ADSP-2188NKSTZ-320 is housed in a 100-lead LQFP package (Pb-free, RoHS-compliant). Pin functions are defined per Analog Devices ADSP-218xN Rev. A datasheet, with dedicated buses for program/data addressing, dual serial I/O, flag I/O, timer, and ICE-Port™ emulation interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2188NKSTZ-320, ADSP-2189NKSTZ-320 offers reduced memory at lower cost for less demanding signal paths, while TMS320VC5402PGE100 provides higher clock rate but requires external companding logic and lacks the ADSP-2188N's seamless boot-from-EPROM capability.

Availability

ADSP-2188NKSTZ-320 is available at Aetrix Electronics and suitable for voice communications terminals, industrial motor controllers, and portable medical devices requiring stable component supply across extended production lifecycles.

Supply support for ADSP-2188NKSTZ-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 for precision instrumentation, communications, and industrial systems.

The ADSP-218xN series was designed as a pin-compatible, memory-scalable evolution of the ADSP-2100 architecture to serve cost-sensitive, low-power embedded DSP applications requiring integrated memory and serial I/O - particularly in voice, audio, and real-time control domains.

FAQ

What is the maximum operating frequency and instruction throughput of the ADSP-2188NKSTZ-320?

The ADSP-2188NKSTZ-320 operates with a 12.5 ns instruction cycle time, delivering 80 million instructions per second (MIPS) sustained performance. This is achieved using a 40 MHz external clock input (or crystal) that drives an internal 80 MHz instruction clock. All instructions execute in a single cycle, and the processor maintains this throughput under full memory and I/O load conditions as specified in the Rev. A datasheet.

Does the ADSP-2188NKSTZ-320 support automatic booting from external memory?

Yes, the ADSP-2188NKSTZ-320 supports automatic booting from byte-wide external memory (e.g., EPROM or Flash) via its Byte DMA (BDMA) port. When configured in Mode C = 0 and Mode D = X (per Table 2), the device loads the first 32 words of program memory from byte memory space before beginning execution. This feature eliminates the need for external boot ROM initialization logic and is fully documented in the ADSP-218xN Rev. A Hardware Reference.

What are the power management capabilities of the ADSP-2188NKSTZ-320?

The ADSP-2188NKSTZ-320 provides three low-power modes: Power-Down (200 CLKIN cycle wake-up), Idle (interrupt-wakeup only), and Slow Idle (programmable clock divisor of 16/32/64/128). Power-Down mode reduces CMOS standby power significantly, and the PWD/PWDACK pins enable hardware-controlled entry and status verification. These features are validated in the "Low-Power Operation" section of the Rev. A datasheet.

How does the ADSP-2188NKSTZ-320 handle serial audio interfaces with companding?

The ADSP-2188NKSTZ-320 integrates hardware A-law and μ-law companding per CCITT G.711 in both SPORT0 and SPORT1, eliminating CPU overhead for voice codec processing. Each serial port supports 3–16-bit word lengths, programmable framing, and double-buffered transmit/receive sections. Companding is enabled via dedicated control bits in the SPORT registers and operates transparently during autobuffer transfers.

Is the ADSP-2188NKSTZ-320 pin-compatible with other members of the ADSP-218xN family?

Yes, all ADSP-218xN series devices-including ADSP-2184N, ADSP-2185N, ADSP-2186N, ADSP-2187N, ADSP-2188N, and ADSP-2189N-are fully pin-compatible in both 100-lead LQFP and 144-ball BGA packages. They differ only in on-chip SRAM size (program and data memory), enabling memory-scaling without PCB redesign. This compatibility is explicitly stated in the "General Description" section of the Rev. A datasheet.