Analog Devices Inc. ADSP-21065LKCAZ264

Overview

ADSP-21065LKCAZ264 from Analog Devices is a 32-bit SHARC® floating-point DSP microcomputer optimized for real-time signal processing in audio, communications, and industrial control systems. It delivers 66 MIPS / 198 MFLOPS peak performance, integrates 544 Kbits of configurable dual-ported SRAM, and supports I²S with eight simultaneous transmit/receive channels. Its 264-pin Mini-BGA package enables high-density PCB layouts for embedded audio processing platforms.

For engineers reviewing the ADSP-21065LKCAZ264 datasheet, ADSP-21065LKCAZ264 pinout, ADSP-21065LKCAZ264 application, or ADSP-21065LKCAZ264 equivalent, key selection criteria include sustained 132 MFLOPS throughput, glueless SDRAM interface at 66 MHz, dual serial ports with TDM/I²S support, and code compatibility across the ADSP-2106x family.

Technical Context

The ADSP-21065LKCAZ264 implements the Super Harvard Architecture with four independent buses enabling simultaneous instruction fetch, dual data access, and I/O transfer per cycle. Its core includes parallel ALU, multiplier, and barrel shifter units supporting IEEE 32-bit single-precision and 40-bit extended-precision floating-point arithmetic plus 32-bit fixed-point operations.

On-chip resources include two DAGs for hardware circular buffering, an instruction cache for looped FFT/filter acceleration, and a 10-channel DMA controller-eight dedicated to serial ports and two to the external port. The device operates at 66 MHz instruction rate (33 MHz input clock) with 3.3 V supply and supports multiprocessing via distributed bus arbitration.

Key Specifications

Pinout & Package

ADSP-21065LKCAZ264 uses a 264-ball Mini-BGA package (1.27 mm pitch) with power/ground ball mapping optimized for low-noise signal processing. Ball assignment follows Analog Devices' standard SHARC pinout layout for memory, serial, host, and multiprocessing interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21065LKCAZ264, the ADSP-21060KS-133 trades modern peripherals for raw clock speed in a through-hole package, while the ADSP-21161NKCAZ-200 delivers architectural improvements but requires voltage rail redesign and toolchain updates.

Availability

ADSP-21065LKCAZ264 is available at Aetrix Electronics and suitable for professional audio mixing consoles, telecom voice gateways, and industrial motor control systems requiring stable component supply across long production lifecycles.

Supply support for ADSP-21065LKCAZ264 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D centers worldwide.

The ADSP-21065LKCAZ264 belongs to the SHARC® family-designed specifically for computationally intensive, low-latency signal processing in audio, communications, and industrial instrumentation where both floating-point precision and deterministic timing are mandatory.

FAQ

What clock configuration does ADSP-21065LKCAZ264 require to achieve its rated 66 MHz instruction rate?

ADSP-21065LKCAZ264 requires a 33 MHz external clock applied to CLKIN to achieve its 66 MHz instruction rate (15 ns cycle time). The device does not contain an internal PLL; it uses a clock doubler circuit that multiplies the input clock. Crystal oscillator connections to CLKIN/XTAL are supported, but the crystal must be rated at 33 MHz-not 66 MHz-to meet timing specifications in the datasheet.

How does the dual-ported SRAM in ADSP-21065LKCAZ264 improve real-time audio processing performance?

The 544 Kbits dual-ported SRAM in ADSP-21065LKCAZ264 allows the core processor and DMA controller to access separate memory banks simultaneously-enabling concurrent execution of filter algorithms from Block 0 while DMA loads new coefficients or audio samples into Block 1. This eliminates memory arbitration stalls and sustains 132 MFLOPS throughput during continuous I²S streaming.

Can ADSP-21065LKCAZ264 directly interface with standard SDRAM chips without external logic?

Yes, ADSP-21065LKCAZ264 features a glueless SDRAM controller supporting 16 Mb, 64 Mb, and 128 Mb industry-standard SDRAM devices at 66 MHz. The controller generates all required row/column address strobes, bank selects, and refresh commands internally. No external address latches, clock buffers, or command decoders are needed for basic SDRAM interfacing.

What is the functional difference between SPORT0 and SPORT1 on ADSP-21065LKCAZ264?

SPORT0 and SPORT1 on ADSP-21065LKCAZ264 are functionally identical-each supports independent transmit/receive operations, I²S/TDM/DSP serial modes, and hardware companding. They differ only in physical ball assignment and default initialization state. Both can be configured for 8-channel I²S, allowing ADSP-21065LKCAZ264 to drive two separate audio subsystems (e.g., main mix + monitor path) concurrently.

Is ADSP-21065LKCAZ264 pin-compatible with other ADSP-2106x family members?

No-ADSP-21065LKCAZ264 uses a 264-ball Mini-BGA package, while ADSP-21060/21061/21062 use 208-lead MQFP packages. Pin-to-pin compatibility does not exist across packages. However, ADSP-21065LKCAZ264 is code-compatible and functionally compatible with the ADSP-2106x family, enabling software reuse and architectural migration without firmware rewrites.