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ADI 公司的ADAU1761是低功耗集成了数字音频处理的立体声CODEC,支持立体声48kHz灌音,1.8V播放时的功耗为14mW.立体声ADC和DAC支持取样速率从8kHz 到96kHz以及数字音量控制. 音频处理SigmaDSP核具有28位处理能力,能使设计者赔偿麦克风,扬声器,放大器和听觉情况中现实世界的限制,通过平衡,多频带压缩,限幅和第三方算法来极大地改善音频质量.主要应用在智能手机/多媒体手机,数码相机/数码摄像机,手提媒体播放器/手提音频播放器等.本京电港论坛文章先容ADAU1761主要特点,功能方框架图, 系统方框架图以及评估板EVAL-ADAU1761Z 功能方框架图,电路原理图纸和质料清单(BOM). The ADAU1761 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 14 mW from a 1.8 V analog supply. The stereo audio ADCs and DACs support sample rates from 8 kHz to 96 kHz as well as a digital volume control. The SigmaDSP® core features 28-bit processing (56-bit double precision). The processor allows system designers to compensate for the real-world limitations of microphones, speakers, amplifiers, and listening environments, resulting in a dramatic improvement in the perceived audio quality through equalization, multiband compression, limiting, and third-party branded algorithms. The SigmaStudio™ graphical development tool is used to program the ADAU1761. This software includes audio processing blocks such as filters, dynamics processors, mixers, and low level DSP functions for fast development of custom signal flows. The record path includes an integrated microphone bias circuit and six inputs. The inputs can be mixed and muxed before the ADC, or they can be configured to bypass the ADC. The ADAU1761 includes a stereo digital microphone input. The ADAU1761 includes five high power output drivers (two differential and three single-ended), supporting stereo head-phones, an earpiece, or other output transducer. AC-coupled or capless configurations are supported. Individual fine level controls are supported on all analog outputs. The output mixer stage allows for flexible routing of audio. ADAU1761主要特点: SigmaDSP 28-/56-bit, 50 MIPS digital audio processor Fully programmable with SigmaStudio graphical tool 24-bit stereo audio ADC and DAC: >98 dB SNR Sampling rates from 8 kHz to 96 kHz Low power: 7 mW record, 7 mW playback, 48 kHz at 1.8 V 6 analog input pins, configurable for single-ended or differential inputs Flexible analog input/output mixers Stereo digital microphone input Analog outputs: 2 differential stereo, 2 single-ended stereo, 1 mono headphone output driver PLL supporting input clocks from 8 MHz to 27 MHz Analog automatic level control (ALC) Microphone bias reference voltage Analog and digital I/O: 1.8 V to 3.65 V I2C and SPI control interfaces Digital audio serial data I/O: stereo and time-division multiplexing (TDM) modes Software-controllable clickless mute Software power-down GPIO pins for digital controls and outputs 32-lead,5 mm × 5 mm LFCSP −40℃ to +85℃ operating temperature range ADAU1761应用: Smartphones/multimedia phones Digital still cameras/digital video cameras Portable media players/portable audio players Phone accessories products ADAU1761 评估板EVAL-ADAU1761Z The EVAL-ADAU1761Z includes both single-ended and differ-ential stereo line-level analog audio inputs as well as a digital audio interface. Single-ended and differential analog outputs are also provided, as well as a stereo capless headphone output. The USBi provides power and the I2C communications interface to the evaluation board. A switch allows the ADAU1761 to operate at either 3.3 V or 1.8 V. The SigmaStudio™ programming software is used for all register controls and SigmaDSP® core programming. A header is included for interfacing to stereo digital microphones. GPIO functions, such as push-buttons, LEDs, and switches, can be connected to the GPIO pins of the ADAU1761 for hardware control of the SigmaDSP. 评估板EVAL-ADAU1761Z 质料清单(BOM):
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