Ad2437 - Audio Bus A 2 B Transceiver; Adau1452 - Sigmadsp Digital Audio Processor - Analog Devices EVAL-AD2437A1MZ Manual

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AD2437 - Audio Bus A B Transceiver
AD2437 - Audio Bus A
The AD2437 provides a multi-channel, I2S/TDM link over distances of up to 30 m between nodes. It embeds bi-
directional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock, and synchronization
signals onto a single differential wire pair. A
sy-chained nodes at different locations to contribute and/or consume time division multiplexed channel content.
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A B is a single-main, multiple-sub system where the transceiver at the host controller is the main node and generates
clock, synchronization, and framing for all sub nodes. The main A
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(I C and SPI) for configuration and read back. An extension of this control bus is embedded in the A
stream, which grants direct access of registers and status information on sub transceivers as well as I
munication over distance.
The transceiver can connect directly to general-purpose digital signal processors (DSPs), field-programmable gate
arrays (FPGAs), application specific integrated circuits (ASICs), microphones, analog-to-digital converters (ADCs),
digital-to-analog converters (DACs), and codecs through a multi-channel I
pulse density modulation (PDM) interface for direct connection of up to four PDM digital microphones.
Finally, the transceiver also supports an A
to the sub nodes over the same daisy-chained, twisted pair cable as used for the communication link. Please refer to
the datasheet for more details.

ADAU1452 - SigmaDSP Digital Audio Processor

The ADAU1452 is an automotive qualified audio processor that far exceeds the digital signal processing capabilities
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of earlier SigmaDSP devices. The restructured hardware architecture is optimized for efficient audio processing.
The audio processing algorithms are realized in sample-by-sample and block-by-block paradigms that can both be
executed simultaneously in a signal processing flow created using the graphical programming tool, SigmaStudio+
The restructured 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 1.2 V, 32-bit DSP core can run at frequencies of up to 294.912 MHz and execute up to 6144 instructions per
sample at the standard sample rate of 48 kHz. However, in addition to industry standard rates, a wide range of sam-
ple rates are available. The integer PLL and flexible clock generator hardware can generate up to 15 audio sample
rates simultaneously. These clock generators, along with the on board asynchronous sample rate converters (ASRCs)
and a flexible hardware audio routing matrix, make the ADAU1452 ideal audio hubs that greatly simplify the design
of complex multirate audio systems.
The ADAU1452 interfaces with a wide range of ADCs, DACs, digital audio devices, amplifiers, and control circui-
try, due to their highly configurable serial ports, S/PDIF interfaces, and multipurpose input/output pins. They can
also directly interface with PDM output MEMS microphones, thanks to integrated decimation filters specifically
designed for that purpose.
2–4
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B Transceiver
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B supports a direct point to point connection and allows multiple, dai-
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B bus powering feature, where the main node supplies voltage and current
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B device is programmable over a control bus
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S/TDM interface. It also provides a
EVAL-AD2437A1MZ Manual
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B data
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C and SPI com-
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.