Analog Devices Inc. ADSP-21478KCPZ-1A

Overview

ADSP-21478KCPZ-1A from Analog Devices is a 32-bit/40-bit floating-point SHARC DSP optimized for high-performance audio processing, operating at up to 300 MHz with 3 Mbits of on-chip SRAM and 4 Mbits of factory-programmed ROM containing Dolby/DTS audio decoders. It integrates dual SIMD computational units (PEx/PEy), eight serial ports (SPORTs), an S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), and digital applications interface (DAI) routing for real-time audio signal flow in professional audio systems.

For engineers reviewing the ADSP-21478KCPZ-1A datasheet, ADSP-21478KCPZ-1A pinout, ADSP-21478KCPZ-1A application, or ADSP-21478KCPZ-1A equivalent, this page delivers verified core clock performance (300 MHz), memory configuration (3 Mbit SRAM + 4 Mbit ROM), peripheral set (S/PDIF Tx/Rx, ASRC ×4, SPORT ×8), thermal diode support, and AEC-Q100 qualification - all confirmed for the exact 88-lead LFCSP_VQ package variant.

Technical Context

The ADSP-21478KCPZ-1A implements a dual-processing-element SIMD architecture where PEx executes all instructions and PEY is enabled via MODE1.PEYEN, enabling parallel 32-/40-bit floating-point operations across both units. Its enhanced Harvard architecture sustains simultaneous 64-bit PM and DM bus transfers per cycle, supported by instruction cache and dual DAGs with hardware circular buffer management.

Peripherals are partitioned into core and I/O processor domains: the core domain hosts JTAG, timer, and memory interfaces, while the I/O domain includes DAI (with PCG ×4, IDP/PDAP, S/PDIF), DPI (SPI ×2, TWI ×1, UART ×1, PWM ×4), and external port logic - though the 88-lead LFCSP_VQ package disables SDRAM/AMI functionality per Table 2 footnote 1.

Key Specifications

Pinout & Package

ADSP-21478KCPZ-1A uses an 88-lead LFCSP_VQ package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Analog Devices Rev. E datasheet Section "88-LFCSP_VQ Lead Assignment" (Page 66), including dedicated DAI/DPI routing pins, JTAG interface, power/ground distribution, and thermal diode output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21479KCPZ-1A, ADSP-21478KCPZ-1A trades SDRAM support and extra memory for pin-compatible deployment in space-constrained LFCSP_VQ layouts; versus ADSP-21477KCPZ-2A, it delivers 50% higher clock speed, 50% more RAM, and full audio-optimized peripherals - making it the optimal balance of performance, integration, and package compatibility for professional audio designs.

Availability

ADSP-21478KCPZ-1A is available at Aetrix Electronics and suitable for professional audio mixers, automotive infotainment head units, and high-end soundbar processors requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for ADSP-21478KCPZ-1A 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 leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Wilmington, MA, with decades of expertise in precision signal processing for audio, industrial, and automotive markets.

The ADSP-21478KCPZ-1A belongs to the SHARC family of SIMD floating-point DSPs, designed specifically for computationally intensive, low-latency audio applications - including multichannel mixing, real-time effects processing, and licensed audio codec execution.

FAQ

What is the maximum operating frequency of the ADSP-21478KCPZ-1A?

The ADSP-21478KCPZ-1A operates at up to 300 MHz, delivering 1.8 GFLOPS peak performance in SIMD mode. This frequency is guaranteed across the commercial temperature range (0°C to +70°C) and supported by the 88-lead LFCSP_VQ package's thermal design. The ADSP-21478KCPZ-1A achieves this speed with full peripheral functionality enabled, including all eight SPORTs and the S/PDIF transceiver.

Does the ADSP-21478KCPZ-1A include factory-programmed audio decoders?

Yes, the ADSP-21478KCPZ-1A contains 4 Mbits of factory-programmed ROM with licensed Dolby and DTS audio decoders. This ROM is pre-verified and ready for deployment in production audio systems - eliminating the need for external flash memory, custom bootloader development, or separate decoder licensing negotiations.

Is the ADSP-21478KCPZ-1A pin-compatible with other SHARC processors like the ADSP-21477 or ADSP-21479?

No - the ADSP-21478KCPZ-1A uses an 88-lead LFCSP_VQ package, while the ADSP-21477KCPZ-2A uses a 100-lead LQFP and the ADSP-21479KCPZ-1A uses a 196-ball CSP_BGA. These packages have different pin counts, layouts, and thermal pad configurations, making them physically and electrically incompatible without PCB redesign.

Can the ADSP-21478KCPZ-1A interface with SDRAM memory?

No - the ADSP-21478KCPZ-1A in the 88-lead LFCSP_VQ package does not support SDRAM or the asynchronous memory interface (AMI). As stated in Table 2 footnote 1 of the Rev. E datasheet, SDRAM controller pins are disabled in this package variant. External memory expansion must use parallel or serial interfaces compatible with the DAI/DPI peripheral set.

What audio-specific peripherals are integrated into the ADSP-21478KCPZ-1A?

The ADSP-21478KCPZ-1A integrates an S/PDIF transceiver, four asynchronous sample rate converters (ASRCs), eight serial ports (SPORTs), a digital applications interface (DAI) with flexible signal routing, and four precision clock generators (PCGs). These peripherals enable end-to-end digital audio processing - from multi-format input capture and sample rate adaptation to real-time effects and synchronized multi-channel output.