Analog Devices Inc. ADSP-21161NKCAZ100

Overview

ADSP-21161NKCAZ100 from Analog Devices is a 100 MHz SHARC® 32-bit floating-point DSP with dual computational units (PEX/PEY), 1 Mbit on-chip dual-ported SRAM, SDRAM controller, four serial ports supporting I²S up to 16 channels, and 225-ball CSP_BGA package. It executes SIMD instructions in single cycle and delivers 440 MFLOPs sustained performance for real-time audio, medical imaging, and motor control systems.

For engineers reviewing the ADSP-21161NKCAZ100 datasheet, ADSP-21161NKCAZ100 pinout, ADSP-21161NKCAZ100 application, or ADSP-21161NKCAZ100 equivalent, key selection criteria include IEEE 32-/40-bit floating-point support, glueless multiprocessing capability for up to six devices, 110 MHz core option compatibility, and dual-DAG hardware circular buffer implementation for FFT and filter delay lines.

Technical Context

The ADSP-21161NKCAZ100 implements a Super Harvard Architecture with four independent buses enabling simultaneous instruction fetch, dual data fetch, and zero-overhead I/O. Its dual processing elements (PEX and PEY) execute identical instructions on separate data streams under SIMD mode enabled via MODE1 register bit PEYEN.

Memory subsystem includes two 0.5 Mbit dual-ported SRAM blocks supporting concurrent core and I/O processor access, plus an SDRAM controller delivering up to 440 MB/s (32-bit) or 660 MB/s (48-bit) throughput. Serial ports operate at ≤55 Mbps each and support TDM, I²S (8–32 bit words), μ-law/A-law companding, and programmable endianness.

Key Specifications

Pinout & Package

ADSP-21161NKCAZ100 uses a 225-ball CSP_BGA package (17 mm × 17 mm, 0.8 mm ball pitch) with signal balls arranged in 15 × 15 grid. Ball assignments follow standard SHARC pinout conventions defined in Analog Devices Rev. C datasheet pages 11–15 and 56–57.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance floating-point DSP applications.

Compared with ADSP-21161NKCAZ110, the ADSP-21161NKCAZ100 trades 20% peak performance for lower power and thermal footprint; compared with ADSP-21160KCAZ100, it adds SIMD capability and doubles sustained FLOP count at identical clock rate-critical for real-time multichannel audio or radar beamforming.

Availability

ADSP-21161NKCAZ100 is available at Aetrix Electronics and suitable for professional audio equipment, medical imaging subsystems, industrial motor drives, and secure voice terminals requiring stable component supply across multi-year production cycles.

Supply support for ADSP-21161NKCAZ100 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 applications.

The ADSP-21161NKCAZ100 belongs to the SHARC® DSP product line, designed specifically for computationally intensive real-time signal processing in audio, medical, military, and industrial systems where deterministic latency and floating-point accuracy are critical.

FAQ

What clock sources does the ADSP-21161NKCAZ100 support?

The ADSP-21161NKCAZ100 accepts an external clock or crystal via CLKIN pin and uses an on-chip PLL with selectable multiplication ratios (2×, 3×, 4×, 6×, 8×) controlled by CLK_CFG1–0 and CLKDBL pins. This allows generation of the 100 MHz core clock from common 12.5 MHz or 25 MHz crystals. The ADSP-21161NKCAZ100 datasheet specifies that the PLL locks within 100 μs after power-up, ensuring reliable boot timing.

Does the ADSP-21161NKCAZ100 support I²S audio interface natively?

Yes, the ADSP-21161NKCAZ100 supports I²S natively through its four serial ports, each configurable for I²S mode with 8–32 bit word lengths, left/right justification, and programmable frame sync polarity. Two serial ports can act as I²S transmitters and two as receivers simultaneously, enabling up to 16 I²S channels using two stereo codecs. The ADSP-21161NKCAZ100 implements full I²S timing compliance including WS inversion and sample rate independence from core clock.

How much on-chip memory does the ADSP-21161NKCAZ100 provide, and how is it organized?

The ADSP-21161NKCAZ100 integrates 1 Mbit (128 Kbytes) of on-chip dual-ported SRAM, split into two independent 0.5 Mbit blocks (Block 0 and Block 1). Each block supports concurrent single-cycle access by the core processor and I/O processor. Memory can be configured as 32K × 32-bit data, 64K × 16-bit data, or 21K × 48-bit instructions, with 16-bit floating-point storage mode doubling effective capacity. The ADSP-21161NKCAZ100 memory map reserves fixed address ranges for each block as documented in Figure 3 of the Rev. C datasheet.

Can the ADSP-21161NKCAZ100 interface directly with SDRAM without external logic?

Yes, the ADSP-21161NKCAZ100 features a glueless SDRAM controller supporting standard 16 Mb, 64 Mb, 128 Mb, and 256 Mb SDRAM devices. It generates all required control signals (CKE, CAS, RAS, WE, DQM) and supports pipelined address/control timing. The controller operates at full core clock frequency (100 MHz) or half-rate, achieving up to 440 MB/s for 32-bit transfers. The ADSP-21161NKCAZ100 SDRAM interface includes programmable refresh timing and bank mapping across four external memory banks.

What boot options are available for the ADSP-21161NKCAZ100 at power-up?

The ADSP-21161NKCAZ100 supports four boot modes selected by BMS, EBOOT, and LBOOT pins: 8-bit EPROM, host processor (8/16/32-bit), SPI interface, or link port. Boot configuration is latched at power-up reset and remains fixed until next reset. The ADSP-21161NKCAZ100 executes boot loader code from external memory into on-chip SRAM before jumping to application start address, enabling field firmware updates without hardware modification.