ADSP-21479BBCZ-2A ADI SHARC Floating-Point DSP 200MHz 800MFLOPS 5Mb SRAM SPORT SPI BGA-196

ADSP-21479BBCZ-2A Product Overview

The ADSP-21479BBCZ-2A is a high-performance 32-bit floating-point SHARC digital signal processor from Analog Devices, supplied in a BGA-196 package. Operating over the commercial temperature range of 0°C to +70°C, the ADSP-21479BBCZ-2A features a fourth-generation SHARC core running at 200 MHz, delivering up to 800 MFLOPS peak floating-point performance for demanding audio, industrial control, and measurement algorithms. The ADSP-21479BBCZ-2A integrates 5 Mbit of internal SRAM (3 Mbit program RAM + 2 Mbit data RAM) and provides an external memory interface supporting 16-bit SDRAM, asynchronous SRAM, and FLASH expansion for large programs and data buffers. Peripherals include four SPORT serial interfaces (compatible with I2S, TDM, and other audio protocols), two SPI ports, a UART, 16 general-purpose I/O pins, and multiple timers. With ADI’s VisualDSP++ or CrossCore Embedded Studio development environment, engineers can quickly develop and debug algorithms. The ADSP-21479BBCZ-2A is widely used in professional audio effects, automotive audio DSP, instrumentation, and a variety of embedded signal processing systems requiring high-speed floating-point computation.

ADSP-21479BBCZ-2A Core Features

Processor Core: The ADSP-21479BBCZ-2A features a 4th-gen SHARC 32-bit floating-point DSP, 200 MHz (5 ns cycle).

Floating-Point Performance: The ADSP-21479BBCZ-2A delivers up to 800 MFLOPS peak.

Internal Memory: The ADSP-21479BBCZ-2A provides 5 Mbit SRAM (3 Mbit program RAM + 2 Mbit data RAM).

External Memory Interface: The ADSP-21479BBCZ-2A supports 16-bit SDRAM, async SRAM, FLASH.

Serial Peripherals: The ADSP-21479BBCZ-2A includes 4× SPORT (I2S/TDM capable), 2× SPI.

Other Peripherals: The ADSP-21479BBCZ-2A offers UART, 16 GPIOs, timers.

DMA Controller: The ADSP-21479BBCZ-2A incorporates a multi-channel DMA for efficient data transfer.

Power Supply: The ADSP-21479BBCZ-2A operates with 1.2 V core / 3.3 V I/O.

Package: The ADSP-21479BBCZ-2A comes in a BGA-196 (12×12 mm).

Temperature Range: The ADSP-21479BBCZ-2A operates over 0°C to +70°C (commercial).

ADSP-21479BBCZ-2A Applications

Professional Audio Processing: The ADSP-21479BBCZ-2A excels in digital reverbs, multi-band equalizers, dynamics processors, and guitar effects.

Automotive Audio DSP: The ADSP-21479BBCZ-2A handles active noise cancellation, multi-channel audio signal processing, and engine noise elimination.

Industrial Instrumentation: The ADSP-21479BBCZ-2A enables real-time spectral analysis, vibration monitoring, harmonic measurement, and industrial control.

Medical Equipment: The ADSP-21479BBCZ-2A supports portable ultrasound, ECG/EEG signal processing front ends (indoor environments).

General Floating-Point DSP: The ADSP-21479BBCZ-2A is ideal for control and data acquisition systems requiring high-speed floating-point computation.

ADSP-21479BBCZ-2A Key Advantages

Efficient Floating-Point Power: The ADSP-21479BBCZ-2A's 200 MHz SHARC core delivers 800 MFLOPS for complex algorithms.

Large On-Chip SRAM: The ADSP-21479BBCZ-2A's 5 Mbit internal memory reduces reliance on external memory.

Flexible External Memory: The ADSP-21479BBCZ-2A's SDRAM/FLASH interface suits large programs and data buffers.

Audio-Optimized Interfaces: The ADSP-21479BBCZ-2A provides 4 SPORTs with I2S/TDM directly connecting to multiple ADCs/DACs/codecs.

Rich Serial Peripherals: The ADSP-21479BBCZ-2A's dual SPI + UART enable easy connectivity to MCUs or wireless modules.

Easy Development: The ADSP-21479BBCZ-2A is supported by VisualDSP++/CrossCore Studio providing a complete toolchain and optimized libraries.

Classic SHARC Family: The ADSP-21479BBCZ-2A is a mature 4th-gen architecture with proven global deployment and stable supply.

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FAQ:

1. What performance level does the 200 MHz ADSP-21479BBCZ-2A offer, and what applications is it best suited for?
   With 400 MFLOPS of floating-point performance, the ADSP-21479BBCZ-2A easily handles multi-band EQ, stereo reverb, and dynamics compression while streaming I2S audio. It's ideal for mid-range digital effects pedals, powered speaker DSP, and industrial vibration analysis. If your algorithm demands more headroom, consider the 266 MHz variant (532 MFLOPS).

2. Is the BGA-196 package hand-solderable? How do I handle prototyping?
   The 0.65mm pitch BGA of the ADSP-21479BBCZ-2A is difficult to solder by hand and is best assembled using reflow ovens or professional SMT services. For hand prototyping, you can use BGA test sockets or adapter boards.

3. Do I need to modify my code when moving between the 200 MHz and 266 MHz versions of the 21479?
   No core algorithm changes are required when migrating to or from the ADSP-21479BBCZ-2A. Both use the identical SHARC instruction set. Simply select the correct device in CCES and recompile. Note that the ADSP-21479BBCZ-2A has a 5 ns cycle time vs. 3.75 ns for the 266 MHz version, so timing-critical loops should be re-verified.

4. How many seconds of audio delay can the 5 Mbit SRAM hold? Is it sufficient for reverb?
   The ADSP-21479BBCZ-2A's 5 Mbit equals 640 KB. At 48 kHz, 32-bit float, each mono channel uses 192 KB/s, providing about 3.3 seconds of mono delay buffer. This is ample for spring and room reverb models. For very large hall reverbs, external SDRAM can be added to the ADSP-21479BBCZ-2A to extend delay lines.

5. How does the ADSP-21479 compare to SigmaDSPs like the ADAU1701 or ADAU1452 for audio design?
   SigmaDSPs use graphical SigmaStudio programming—great for quick standard audio functions without coding. The ADSP-21479BBCZ-2A requires C/C++ but offers far greater flexibility and floating-point precision for custom algorithms, ANC, or professional equipment needing fine-grained control.

6. What power supplies are required, and what is the typical power consumption?
   The ADSP-21479BBCZ-2A needs a 1.2 V core supply and a 3.3 V I/O supply. At 200 MHz full load, typical power consumption is around 0.5–0.8 W, significantly lower than 400 MHz versions. Clock gating and sleep modes can further reduce power for battery-operated devices.

7. I want to build a 4-in/4-out audio interface. Are the SPORTs sufficient?
   Yes. The four SPORTs of the ADSP-21479BBCZ-2A can each be configured as an independent I2S port connected to one stereo ADC or DAC, providing exactly 4-in/4-out (8 analog channels). Using TDM mode, each SPORT supports even more channels for multi-track recording.

8. Will adding external SDRAM affect real-time performance? What is the maximum supported capacity?
   External SDRAM is accessed via DMA without CPU intervention, so real-time impact on the ADSP-21479BBCZ-2A is minimal. The device supports up to 32 MB of 16-bit SDRAM, easily handling long delay lines, large audio sample banks, or display buffers.

9. Where can I find audio algorithm libraries? Are there free reverb and EQ reference implementations?
   ADI provides rich audio algorithm libraries for the SHARC family (such as Audio Weave and CrossCore libraries) with reference implementations of parametric EQs, compressors, reverbs, and crossovers. These libraries can be imported directly into CrossCore Embedded Studio projects and evaluated on development boards for rapid prototyping of the ADSP-21479BBCZ-2A.

10. Does the BGA-196 package need special thermal management or an extra heatsink?
    Usually no extra heatsink is required for the ADSP-21479BBCZ-2A. At 200 MHz, power dissipation is low (typically <0.8 W), and the PCB's copper planes and thermal vias can effectively spread the heat. It's recommended to use a solid ground plane and an array of thermal vias under the BGA to conduct heat into the inner and bottom layers for reliable long-term operation.