Analog Devices Inc. ADSP-21469KBCZ-4

Overview

ADSP-21469KBCZ-4 from Analog Devices is a 32-bit/40-bit floating-point SHARC® DSP optimized for high-fidelity audio processing, operating at up to 450 MHz with 5 Mbits of on-chip SRAM and 4 Mbits of mask-programmable ROM. It integrates dual SIMD computational units (PEX/PEY), eight serial ports, S/PDIF transceiver, four asynchronous sample rate converters, and DDR2 memory interface - deployed in automotive infotainment head units and professional audio mixing consoles.

For engineers reviewing the ADSP-21469KBCZ-4 datasheet, ADSP-21469KBCZ-4 pinout, ADSP-21469KBCZ-4 application, or ADSP-21469KBCZ-4 equivalent, key selection criteria include its 450 MHz core frequency, 324-ball CSP_BGA package with thermal diode, SIMD-accelerated FIR/IIR/FFT execution, and audiocentric peripherals including PCG, ASRC, and DAI/DPI routing capability.

Technical Context

The ADSP-21469KBCZ-4 implements a dual-processing-element SIMD architecture where PEX executes all instructions and PEY operates conditionally under PEYEN mode bit control - enabling parallel 40-bit floating-point ALU/multiplier/shifter operations per cycle. Its enhanced Harvard architecture supports simultaneous 64-bit PM and DM bus transfers plus instruction cache-driven three-bus operation (1 instruction + 4 operands/cycle).

Peripherals are partitioned into two clock domains: core domain (JTAG, timers, DAGs, FFT/FIR/IIR accelerators) and I/O domain (DAI/DPI, SPORTs, S/PDIF, ASRC, PWM, DDR2 controller). The 16-bit DDR2 interface runs at half-core frequency (225 MHz max), supporting up to 2 Gbits across four banks with programmable timing and shared-bus arbitration for multi-processor systems.

Key Specifications

Pinout & Package

ADSP-21469KBCZ-4 uses a 324-ball CSP_BGA package with 0.8 mm pitch, 15 mm × 15 mm body size, and integrated thermal diode. Ball assignments follow the standard CSP_BGA layout defined in Analog Devices' Rev. B datasheet (Pages 70–71), with dedicated power/ground arrays, differential clock inputs (CLKIN_P/N), JTAG (TCK/TMS/TDI/TDO/TRST), and peripheral-specific ball groups for DAI/DPI, SPORTs, S/PDIF, DDR2, and AMI interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21469KBCZ-4, the ADSP-21467KBCZ-4 offers identical compute and memory but omits ROM-based security and audio decoders, while the TMS320C6748BZWT demands external components to match basic audio I/O - making ADSP-21469KBCZ-4 the only single-chip solution for certified automotive infotainment.

Availability

ADSP-21469KBCZ-4 is available at Aetrix Electronics and suitable for automotive infotainment, professional audio mixing, home theater receivers, and medical ultrasound beamforming requiring stable component supply across extended product lifecycles.

Supply support for ADSP-21469KBCZ-4 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 digital signal processing semiconductors, headquartered in Norwood, MA.

The SHARC® processor family - including ADSP-21469KBCZ-4 - was designed specifically for computationally intensive, low-latency audio and sensor signal processing in automotive, professional audio, and industrial systems.

FAQ

What is the maximum operating frequency of the ADSP-21469KBCZ-4?

The ADSP-21469KBCZ-4 operates at a maximum frequency of 450 MHz, delivering 2.7 GFLOPS in SIMD mode. This frequency is achieved using an internal PLL locked to a 22.5792 MHz or 24.576 MHz differential crystal input applied to CLKIN_P/N pins. Thermal derating is not required up to +105°C ambient under specified power delivery conditions.

Does the ADSP-21469KBCZ-4 include on-chip ROM, and what is stored in it?

Yes, the ADSP-21469KBCZ-4 contains 4 Mbits of mask-programmable ROM. Factory-programmed content includes Dolby AC-3 5.1 Decode, Dolby Pro Logic IIx, Dolby Intelligent Mixer (eMix), Dolby Volume postprocessor, Dolby Headphone v2, DTS Neo:6 and Decode, DTS 5.1 Decode (96/24), math tables, twiddle factors for 256/512 FFT, and ASRC firmware - all executable without external memory.

How does the ADSP-21469KBCZ-4 support audio sample rate conversion?

The ADSP-21469KBCZ-4 integrates four independent asynchronous sample rate converters (ASRC0–ASRC3) capable of real-time conversion between 32 kHz and 192 kHz with –128 dB THD+N. Each ASRC accepts separate input/output clocks and supports programmable interpolation/decimation ratios, enabling seamless integration of disparate audio sources in multi-domain systems.

Is the ADSP-21469KBCZ-4 pin-compatible with other SHARC processors?

Yes, the ADSP-21469KBCZ-4 shares the same 324-ball CSP_BGA package and pinout with ADSP-21467KBCZ-4 and ADSP-21469BBC-3 (leaded variant), enabling direct PCB reuse. However, it is not pin-compatible with earlier ADSP-2136x or ADSP-2126x families due to differences in peripheral ball allocation and power rail requirements.

What security features does the ADSP-21469KBCZ-4 provide for firmware protection?

The ADSP-21469KBCZ-4 implements ROM-based security that prevents unauthorized readout of internal code by disabling JTAG access unless a unique 64-bit customer key is scanned via the TDI pin. When enabled, the device boots exclusively from internal ROM and blocks external code loading - satisfying ISO/SAE 21434 cybersecurity requirements for automotive ECUs.