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ADAU1772 Datasheet(PDF) 1 Page - Analog Devices |
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ADAU1772 Datasheet(HTML) 1 Page - Analog Devices |
1 / 117 page Four ADC, Two DAC Low Power Codec with Audio Processor Data Sheet ADAU1772 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2012–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Programmable audio processing engine 192 kHz processing path Biquad filters, limiters, volume controls, mixing Low latency, 24-bit ADCs and DACs 102 dB SNR (signal through PGA and ADC with A-weighted filter) 107 dB combined SNR (signal through DAC and headphone with A-weighted filter) Serial port sample rates from 8 kHz to 192 kHz 38 μs analog-to-analog latency 4 single-ended analog inputs—configurable as microphone or line inputs Dual stereo digital microphone inputs Stereo analog audio output—single-ended or differential, configurable as either line output or headphone driver PLL supporting any input clock rate from 8 MHz to 27 MHz Full-duplex, asynchronous sample rate converters (ASRCs) Power supplies Analog and digital I/O of 1.8 V to 3.3 V Digital signal processing (DSP) core of 1.1 V to 1.8 V Low power (15 mW for typical noise cancelling solution) I2C and SPI control interfaces, self-boot from I2C EEPROM 7 MP pins supporting dual stereo digital microphone inputs, stereo PDM output, mute, DSP bypass, push-button volume controls, and parameter bank switching APPLICATIONS Noise cancelling handsets, headsets, and headphones Bluetooth ANC handsets, headsets, and headphones Personal navigation devices Digital still and video cameras GENERAL DESCRIPTION The ADAU1772 is a codec with four inputs and two outputs that incorporates a digital processing engine to perform filtering, level control, signal level monitoring, and mixing. The path from the analog input to the DSP core to the analog output is optimized for low latency and is ideal for noise cancelling headsets. With the addition of just a few passive components, a crystal, and an EEPROM for booting, the ADAU1772 provides a complete headset solution. FUNCTIONAL BLOCK DIAGRAM Figure 1. MICROPHONE BIAS GENERATORS MICBIAS0 MICBIAS1 CM ADC MODULATOR ADC DECIMATOR AIN0REF AIN0 PGA ADC MODULATOR ADC DECIMATOR AIN1REF AIN1 PGA ADC MODULATOR AIN2REF AIN2 PGA ADC MODULATOR AIN3REF AIN3 PGA ADC DECIMATOR ADC DECIMATOR DMIC0_1/MP4 DMIC2_3/MP5 DIGITAL MICROPHONE INPUTS INPUT/OUTPUT SIGNAL ROUTING DSP CORE: BIQUAD FILTERS, LIMITERS, VOLUME CONTROLS, MIXING I2C/SPI CONTROL INTERFACE AND SELF-BOOT BIDIRECTIONAL ASRCS SERIAL INPUT/ OUTPUT PORT LDO REGULATOR POWER MANAGEMENT PLL CLOCK OSCILLATOR DAC_SDATA/MP0 ADC_SDATA1/CLKOUT/MP6 XTALI/MCLKIN XTALO ADC_SDATA0/PDMOUT/MP1 BCLK/MP2 LRCLK/MP3 DAC DAC STEREO PDM MODULATOR ADAU1772 HPOUTLP/LOUTLP HPOUTLN/LOUTLN HPOUTRP/LOUTRP HPOUTRN/LOUTRN |
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