ADAU1761: 集成PLL的SIGMADSP(R)立体声、低功耗、96 kHz、24位音频编解码器
ADAU1761是一款低功耗、集成数字音频处理功能的立体声音频编解码器，支持立体声48 kHz录音和回放，采用1.8 V模拟电源供电，功耗为14mW。立体声音频ADC和DAC支持8 kHz至96 kHz范围内的采样速率，并支持数字音量控制。SigmaDSP(R)内核具有28位处理特性（56位双精度）。系统设计人员可以利用这款处理器，通过均衡、多频段压缩、限幅和第三方算法来弥补麦克风、扬声器、功放和听音环境的实际限制，从而明显改善音质体验。可利用SigmaStudioTM图形开发工具对ADAU1761进行编程。该软件含有滤波器、动态处理器、混频器和低层次DSP功能等音频处理模块，可快速开发自定义信号流程。
录音路径包括一个集成麦克风偏置电路和六路输入。可以在ADC之前将这些输入混频和多路复用，或者可以对其配置来旁路ADC。ADAU1761含有一路立体声数字麦克风输入。ADAU1761内置五个高功率输出驱动器（两个差分、三个单端），支持立体声耳机、听筒或其它输出传感器。该器件还支持交流耦合或无电容配置。所有模拟输出均支持独立精密电平控制。输出混频器级允许音频灵活路由。
The ADAU1761 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 10 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(R) 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 SigmaStudioTM 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特点
- SigmaDSP 28/56位、50 MIPS数字音频处理器
- 可利用SigmaStudio图形工具实现完全编程
- 24位立体声音频ADC和DAC：信噪比 > 98 dB
- 采样速率范围：8 kHz至96 kHz
- Linux 驱动
- 低功耗：7 mW录音、7 mW回放（48 kHz、1.8 V）
- 6个模拟输入引脚，可配置为单端或差分输
- 灵活的模拟输入/输出混频器
- 欲了解更多特性，请参考数据手册
- 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: 5 mW record, 5 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
ADAU1761 技术指标
- Instructions/Cycles: 1024
- DAC DNR (dB): 99dB
- DAC THD+N @ 1 kHz (-3dB): 90dB
- Digital I/O Channels: 8/8
- Analog I/O Channels: 2/2
- Product Description: Stereo, low power, 96 kHz, 24-bit SigmaDSP audio codec with integrated PLL
ADAU1761 应用领域
- 智能电话和多媒体电话
- 数码相机和数码摄像机
- 便携式媒体播放器和便携式音频播放器
- 电话配件
ADAU1761 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADAU1761BCPZ | 量产 | 32 ld LFCSP (5x5mm) w/3.5mm exposed pad | 32 | 工业 |
| ADAU1761BCPZ-R7 | 量产 | 32 ld LFCSP (5x5mm) w/3.5mm exposed pad | 32 | 工业 |
| ADAU1761BCPZ-RL | 量产 | 32 ld LFCSP (5x5mm) w/3.5mm exposed pad | 32 | 工业 |
| EVAL-ADAU1761Z | 量产 | 评估板 | - | 工业 |