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ADAU1702JSTZ-RL Datasheet(PDF) 1 Page - Analog Devices |
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ADAU1702JSTZ-RL Datasheet(HTML) 1 Page - Analog Devices |
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1 / 52 page  SigmaDSP® 28-/56-Bit Audio Processor with Two ADCs and Four DACs ADAU1702 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES 28-/56-bit, 25 MIPS digital audio processor Two ADCs: SNR of 100 dB, THD + N of −83 dB Four DACs: SNR of 104 dB, THD + N of −90 dB Complete standalone operation Self-boot from serial EEPROM Auxiliary ADC with 4-input mux for analog control GPIOs for digital controls and outputs Fully programmable with SigmaStudio™ graphical tool 28-bit × 28-bit multiplier with 56-bit accumulator for full double-precision processing Clock oscillator for generating master clock from crystal PLL for generating master clock from 64 × fS, 256 × fS, 384 × fS, or 512 × fS clocks Flexible serial data input/output ports with I2S-compatible, left-justified, right-justified, and TDM modes Sampling rates up to 192 kHz supported On-chip voltage regulator for compatibility with 3.3 V systems 48-lead, plastic LQFP APPLICATIONS Multimedia speaker systems MP3 player speaker docks Automotive head units Minicomponent stereos Digital televisions Studio monitors Speaker crossovers Musical instrument effects processors In-seat sound systems (aircraft/motor coaches) GENERAL DESCRIPTION The ADAU1702 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing includes equalization, cross- over, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening and can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, providing a dramatic improvements of perceived audio quality. Its signal processing is comparable to that found in high end studio equipment. Most 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 through 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. Two Σ-Δ ADCs and four Σ-Δ DACs provide a 98.5 dB analog input to analog output dynamic. Each ADC has a THD + N of −83 dB, and each DAC has a THD + N of −90 dB. Digital input and output ports allow a glueless connection to additional ADCs and DACs. The ADAU1702 communicates through an I2C® bus or a 4-wire SPI® port. FUNCTIONAL BLOCK DIAGRAM 3 2 33 3 3 2 2 GPIO INPUT/OUTPUT MATRIX DIGITAL VDD DIGITAL GROUND ANALOG VDD ANALOG GROUND PLL MODE PLL LOOP FILTER CRYSTAL 3.3V 28-/56-BIT, 25MIPS AUDIO PROCESSOR CORE 10ms DELAY MEMORY 2-CHANNEL ANALOG INPUT 1.8V REGULATOR STEREO ADC FILTA/ ADC_RES RESET/ MODE SELECT CONTROL INTERFACE AND SELFBOOT 8-CH DIGITAL INPUT 8-CH DIGITAL OUTPUT 8-BIT AUX ADC RESET SELF BOOT DIGITAL IN OR GPIO AUX ADC OR GPIO DIGITAL OUT OR GPIO I2C/SPI AND WRITEBACK 4 54 4 DAC DAC 4-CHANNEL ANALOG OUTPUT FILTD/CM PLL CLOCK OSCILLATOR ADAU1702 Figure 1. |
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