ADAU1702

The ADAU1702 is a stand-alone 28/56-bit audio DSP which handles all system processing and control tasks. Processing includes equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening. These algorithms can be used to compensate for the real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

The signal processing used in the ADAU1702 is comparable to that found in high end studio equipment. Most of the processing is done in full 56-bit double-precision mode, resulting in very good low level signal performance. The ADAU1702 is a fully-programmable DSP. The easy-to-use SigmaStudio software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dynamics processors, level controls, and GPIO interface controls.

ADAU1702 programs can be loaded on power-up either from a serial EEPROM though its own self-boot mechanism or from an external microcontroller. On power-down, the current state of the parameters can be written back to the EEPROM from the ADAU1702 to be recalled the next time the program is run.

The ADAU1702's two ADCs and four DACs provide an analogin to analog-out dynamic range greater than 98 dB and THD+N better than -92 dB. Digital input and output ports allow a glueless connection to additional ADCs and DACs. The ADAU1702 operates with either an I2C bus or a 4-wire SPI port.