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ADIADAU1761低功耗数字音频处理CODEC方案

2017-11-24 03:28 PM| 发布者: 河源房源信息| 查看: 1007| 评论: 0

摘要: 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 ...

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

图1{京电港论坛}.ADAU1761功能方框架图

图2{京电港论坛}.ADAU1761系统方框架图

图3{京电港论坛}.ADAU1761接纳模拟麦克风的系统方框架图

图4{京电港论坛}.ADAU1761带数字麦克风和SSM2306 D类扬声器驱动器的系统方框架图

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.

图5{京电港论坛}.评估板EVAL-ADAU1761Z 功能方框架图

图6{京电港论坛}.评估板EVAL-ADAU1761Z 电路原理图纸(1)

图7{京电港论坛}.评估板EVAL-ADAU1761Z 电路原理图纸(2)

评估板EVAL-ADAU1761Z 质料清单(BOM):



详情请复制打开此衔接地址:
http://www.analog.com/static/imported-files/data_sheets/ADAU1761.pdf

http://www.analog.com/static/imported-files/eval_boards/EVAL-ADAU1761Z.pdf


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