Item specifics
Description
ADSP-21469KBCZ-4 Product Overview
The ADSP-21469KBCZ-4 is a high-performance 32-bit floating-point SHARC digital signal processor from Analog Devices, supplied in a BGA-324 package. Operating over the commercial temperature range of 0°C to +70°C, the ADSP-21469KBCZ-4 features a fourth-generation SHARC core running at 400 MHz, delivering up to 1600 MFLOPS peak floating-point performance for the most demanding audio algorithms, industrial control, medical imaging, and high-speed measurement tasks. The ADSP-21469KBCZ-4 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 of the ADSP-21469KBCZ-4 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, simulate, and optimize algorithms on the ADSP-21469KBCZ-4. The ADSP-21469KBCZ-4 is widely used in high-end professional audio effects, digital mixers, automotive audio DSP, instrumentation, and a variety of embedded signal processing systems requiring superior floating-point computation power.
ADSP-21469KBCZ-4 Core Features
Processor Core: The ADSP-21469KBCZ-4 features a 4th-gen SHARC 32-bit floating-point DSP core running at 400 MHz (2.5 ns cycle)
Floating-Point Performance: The ADSP-21469KBCZ-4 delivers 1600 MFLOPS peak
Internal Memory: The ADSP-21469KBCZ-4 provides 5 Mbit SRAM (3 Mbit program RAM + 2 Mbit data RAM)
External Memory Interface: The ADSP-21469KBCZ-4 supports 16-bit SDRAM, async SRAM, and FLASH
Serial Peripherals: The ADSP-21469KBCZ-4 includes 4× SPORT (I2S/TDM capable) and 2× SPI
Other Peripherals: The ADSP-21469KBCZ-4 offers UART, 16 GPIOs, and timers
DMA Controller: The ADSP-21469KBCZ-4 features multi-channel DMA for efficient data transfer
Power Supply: The ADSP-21469KBCZ-4 operates with 1.2 V core / 3.3 V I/O
Package: The ADSP-21469KBCZ-4 comes in BGA-324
Temperature Range: The ADSP-21469KBCZ-4 covers 0°C to +70°C (commercial)
ADSP-21469KBCZ-4 Applications
High-End Professional Audio: The ADSP-21469KBCZ-4 excels in digital reverbs, multi-band equalizers, dynamics processors, guitar effects, and digital mixers
Automotive Audio DSP: The ADSP-21469KBCZ-4 is ideal for active noise cancellation, multi-channel audio signal processing, and engine noise elimination
Industrial Instrumentation: The ADSP-21469KBCZ-4 supports real-time spectral analysis, vibration monitoring, harmonic measurement, and industrial control
Medical Equipment: The ADSP-21469KBCZ-4 is used in portable ultrasound and ECG/EEG signal processing front ends (indoor environments)
General Floating-Point DSP: The ADSP-21469KBCZ-4 suits control and data acquisition systems requiring ultra-high floating-point speed
ADSP-21469KBCZ-4 Key Advantages
Superior Floating-Point Power: The ADSP-21469KBCZ-4's 400 MHz SHARC core delivers 1600 MFLOPS for the most complex algorithms
Large On-Chip SRAM: The ADSP-21469KBCZ-4's 5 Mbit internal memory reduces reliance on external memory, boosting system efficiency
Flexible External Memory: The ADSP-21469KBCZ-4's SDRAM/FLASH interface suits large programs and data buffers
Audio-Optimized Interfaces: The ADSP-21469KBCZ-4's 4 SPORTs with I2S/TDM directly connect to multiple ADCs/DACs/codecs
Rich Serial Peripherals: The ADSP-21469KBCZ-4 offers dual SPI + UART for easy connectivity to MCUs, wireless modules, or debug terminals
Easy Development: The ADSP-21469KBCZ-4 is supported by VisualDSP++/CrossCore Studio providing a complete toolchain and optimized libraries
Classic SHARC Family: The ADSP-21469KBCZ-4 is a mature 4th-gen architecture with proven global deployment and stable supply
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FAQ:
What is the real advantage of the SIMD dual-MAC architecture in the ADSP-21469KBCZ-4? How does 1600 MFLOPS compare to a standard SHARC?
A standard SHARC performs one MAC per cycle (800 MFLOPS at 400 MHz). The ADSP-21469KBCZ-4's SIMD engine executes two independent MACs per cycle, doubling throughput to 1600 MFLOPS. For cascaded biquad filters, complex FFTs, or adaptive LMS algorithms, this nearly doubles channel density or halves the power required for the same workload.
How is the 5 Mbit of internal SRAM organized on the ADSP-21469KBCZ-4? Can I fit both program code and audio delay lines on-chip?
The ADSP-21469KBCZ-4's memory is split into 3 Mbit program RAM and 2 Mbit data RAM using a Harvard architecture. The 2 Mbit data RAM equals roughly 64K samples of 32-bit float—enough for about 1.3 seconds of mono delay at 48 kHz. Moderate reverbs and FIR coefficients fit comfortably on the ADSP-21469KBCZ-4; large algorithms can use external SDRAM for additional delay memory.
What audio interfaces does the ADSP-21469KBCZ-4 support? Can I connect multiple ADCs and DACs directly?
The four SPORTs on the ADSP-21469KBCZ-4 each support I2S and TDM. In I2S mode, you get four stereo links (8 audio channels). In TDM8 mode, each SPORT can carry 8 channels, enabling up to 32 digital audio channels. This flexibility allows direct connection to multiple multi-channel codecs, ADCs, or DACs.
Can I migrate my existing ADSP-21488 code to the ADSP-21469KBCZ-4? What changes are needed?
The instruction set is backward-compatible, so code will run after recompilation. However, to exploit the SIMD dual-MAC capability of the ADSP-21469KBCZ-4, critical loops should be optimized using ADI's DSP libraries or compiler built-in functions. FIR, FFT, and matrix routines benefit most from SIMD acceleration.
How many PCB layers are needed for the BGA-324 package of the ADSP-21469KBCZ-4, and what about thermal management?
Six or more layers are typical for full pin breakout of the ADSP-21469KBCZ-4, though a 4-layer board is feasible if many I/Os are unused. Power dissipation is around 1 W. A solid ground plane and an array of thermal vias under the chip conduct heat into the PCB copper layers—no extra heatsink is normally required.
How does the ADSP-21469KBCZ-4 differ from SigmaDSPs like the ADAU1452 in development approach?
SigmaDSPs use the graphical SigmaStudio drag-and-drop environment, ideal for standard audio functions without coding. The ADSP-21469KBCZ-4, as a SHARC processor, requires C/C++ and assembly programming in CCES, offering much higher flexibility for adaptive filtering, real-time control algorithms, and complex state machines that SigmaDSPs cannot easily implement.
Is the external SDRAM bandwidth of the ADSP-21469KBCZ-4 sufficient for multi-channel 192 kHz audio?
Yes. The 16-bit SDRAM running at 133 MHz provides about 266 MB/s peak bandwidth. Even 32 channels at 192 kHz/32-bit float consume only around 96 MB/s combined. DMA transfers on the ADSP-21469KBCZ-4 handle audio sample movement transparently in the background, leaving the CPU free for full-speed algorithm execution.
What are the power supply requirements and sequencing for the ADSP-21469KBCZ-4?
The ADSP-21469KBCZ-4 requires a 1.2 V core supply and a 3.3 V I/O supply. Core voltage should ramp before or simultaneously with I/O during power-up, and the reverse during power-down. Standard LDO or DC/DC converters with monotonic rise and proper decoupling ensure reliable reset and boot.
Can I build an 8-microphone automatic mixer with the ADSP-21469KBCZ-4? What external components are needed?
Absolutely. Connect two 4-channel TDM ADCs (or a single 8-channel ADC) to one or two SPORTs on the ADSP-21469KBCZ-4 for simultaneous 8-channel capture. The DSP runs voice activity detection, auto gain control, and a mixing matrix, outputting the mixed signal via another SPORT to a DAC. An external SPI flash stores firmware and configuration, enabling standalone operation.
What optimization tips can help maximize the ADSP-21469KBCZ-4's SIMD performance?
Organize filter and FFT data in complex interleaved format so both MACs can operate on real and imaginary parts simultaneously. Use the DSP libraries provided with CCES—their FIR, FFT, and matrix functions are already SIMD-optimized for the ADSP-21469KBCZ-4. When writing custom loops, leverage compiler built-in functions to generate SIMD instructions without manual assembly coding, achieving near-assembly efficiency.