Adau1452 - Sigmadsp Digital Audio Processor; Ad1937 - Four Adcs/Eight Dacs With Pll, 192 Khz, 24-Bit Codec - Analog Devices EVAL-AD2437A1NZ Manual

ADAU1452 - SigmaDSP Digital Audio Processor

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AD2437A1NZ.html
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.
Independent sub and main I2C/SPI control ports allow the ADAU1452 not only to be programmed and configured
by an external main device, but also to act as a main that can program and configure external slave devices directly.
This flexibility, combined with self boot functionality, enables the design of standalone systems that do not require
any external input to operate.
The power efficient DSP core executes full programs while consuming only a few hundred milliwatts (mW) of pow-
er and can run at a maximum program load while consuming less than a watt, even in worst case temperatures ex-
ceeding 100°C. This relatively low power consumption and small footprint make the ADAU1452 ideal replace-
ments for large, general-purpose DSPs that consume more power at the same processing load.
AD1937 - Four ADCs/Eight DACs with PLL, 192 kHz, 24-Bit Co-
dec
The AD1937 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with
differential input and eight digital-to-analog converters (DACs) with differential output, using the Analog Devices,
Inc., patented multibit sigma delta (Σ-Δ) architecture. An I2C port is included, allowing a microcontroller to adjust
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