Features and Benefits

  • 270 MHz, 32-bit Cadence Tensilica HiFi 4 Audio DSP
    • Quad 32-bit × 32-bit MAC support per cycle
    • Single IEEE floating-point multiplier
    • 320 kB L1 SRAM and 160 kB L1 cache
    • Large 2 MB L2 system SRAM
    • Accelerated math instruction extensions
    • C/C++ programmable with complete development toolkit
    • Software compatible with the HiFi DSP family
  • Voice detector with low power always listening mode and DSP core wake up
  • Low latency audio path
  • 4 stereo asynchronous sample rate converters
  • Clock oscillator for generating master clock from crystal
  • Integer PLL and flexible clock generators
  • On-chip regulator for generating 1.2 V from IOVDD supply
  • 6 digital audio input and output ports (serial ports) with 32-bit digital input/output supporting 8 kHz to 192 kHz operation


  • Flexible serial data configuration with I2S, TDM, left and right justified formats, pulse-code modulation (PCM), and bidirectional modes
  • S/PDIF receiver and transmitter—up to 96 kHz sample rate
  • 14 digital PDM microphone input channels
  • 2 stereo PDM output ports
  • SPI flash memory interface—up to 2 GB quad input/output serial flash
  • SPI control interfaces—slave and master with single, dual, and quad modes
  • I2C master interface
  • JTAG debug port
  • Boot ROM with self boot from serial memory
  • 8 multipurpose pins for digital controls and outputs
  • Dedicated event manager for host/driver communication
  • 144-ball, 0.5 mm pitch, 6.095 mm × 6.135 mm WLCSP
  • 0°C to 85°C temperature range

Product Details

The ADAU1472 is a high quality SigmaDSP® digital audio processor with a large internal memory, enabling efficient audio source separation, far field voice capture, speech processing, deep learning, and advanced audio signal processing. The processor combines the highly optimized Cadence® Tensilica® HiFi® 4 audio/voice processor with custom Analog Devices, Inc., instruction extensions for math acceleration, and a flexible input and output architecture. The HiFi 4 processor supports four 32-bit × 32-bit multiplier accumulators (MACs) per cycle with 72-bit accumulators, dual 64-bit memory load, and a native Institute of Electrical and Electronics Engineers (IEEE) single precision, floating-point multiplier.

The ADAU1472 processor offers performance up to 270.336 MHz, supports low latency, sample by sample audio processing, and block by block processing paradigms in parallel. The integer phase-locked loop (PLL) and flexible clock generator hardware can generate up to 15 audio sample rates simultaneously (8 kHz to 192 kHz). These clock generators, along with the on-board asynchronous sample rate converters (ASRCs) and flexible hardware audio routing matrix, greatly simplify the design of complex audio systems.

The HiFi 4 digital signal processor (DSP) core has 480 kB of L1 memory running at the DSP core clock rate, which consists of 256 kB data random access memory (RAM), 64 kB instruction RAM, 128 kB data cache, and 32 kB instruction cache, along with 2 MB of L2 system static random access memory (SRAM) running at one half of the DSP core clock rate. The processor also supports up to 2 GB of external flash memory to enable the storage of large data tables and self boot code.

Dual on-chip power domains allow low power operation, including the capability of routing audio through a flexible audio routing matrix with IOVDD as the only active supply. The configurable voice detection hardware can detect human speech onset while operating in a low power state and can generate both internal DSP and external wake-up signals.

The ADAU1472 interfaces with a wide range of analog-to-digital converters (ADCs), digital-to-analog converters (DACs), digital audio devices, amplifiers, and control circuitry due to its highly configurable serial ports, Sony/Philips digital interface format (S/PDIF) interfaces, and multipurpose input/output pins. The device can also directly interface with up to 14 pulse density modulated (PDM) output microphones due to integrated decimation filters specifically designed for that purpose. The PDM outputs with integrated interpolation filters provide direct connectivity to PDM input Class D amplifiers.

The processor has two serial peripheral interface (SPI) bus master control ports that allow the device to communicate with multiple SPI-compatible devices including support for single, dual, and quad input/output operation. In addition, the SPI flash port allows direct memory mapped read access with minimal central processing unit (CPU) overhead and standalone self boot operation.

The combined high performance DSP core, large RAM, and small footprint make the ADAU1472 an ideal replacement for large, general-purpose DSPs that consume more power for the same processing load.


  • Far field voice interface devices
  • Audio source separation
  • Embedded deep learning for audio
  • Commercial and professional audio processing

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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.