Analog Devices Inc. ADAU145x SigmaDSP® Digital Audio Processors

Their restructured hardware architecture is optimized for efficient audio processing. The audio processing algorithms are realized in sample-by-sample and block-by-block paradigms, which can both be executed simultaneously in a signal processing flow created using the graphical programming tool, SigmaStudio™.

The new digital signal processor (DSP) core architecture enables some types of audio processing algorithms to be executed using significantly fewer instructions than were required on previous SigmaDSP generations, leading to vastly improved code efficiency. The power efficient DSP core executes full programs while consuming only a few hundred milliwatts (mW) of power and can run at a maximum program load while consuming less than a watt, even in worst case temperatures exceeding 100°C.

This relatively low power consumption and small footprint make the ADAU145x ideal replacements for large, general-purpose DSPs that consume more power at the same processing load.

Differences Between the ADAU1452, ADAU1451, and ADAU1450

The three variants of this device are differentiated by the following.

• Memory
• DSP core frequency
• Availability of S/PDIF interfaces
• ASRC configuration

Because the ADAU1450 does not include an S/PDIF receiver or transmitter, the SPDIFIN and SPDIFOUT pins are nonfunctional. Also, the settings of any registers related to the S/PDIF input or output in the ADAU1450 do not have any effect on the operation of the device.

Additionally, because the ADAU1450 does not contain ASRCs, the settings of any registers related to the ASRCs in the ADAU1450 do not have any effect on the operation of the device.