SigmaDSP™音频处理器
SigmaDSP™数字音频处理器使每个人都可以使用SigmaStudio™图形开发工具进行简单配置的完全可编程音频DSP。包括AD1953在内的第一代SigmaDSP产品集成了三个高性能音频DAC与功能强大的DSP内核。第二代全数字器件AD1940与AD1941具有更多的I/O通道,可提供更强的处理能力。
最新的SigmaDSP产品ADAU1701与ADAU1702结合了完整的模拟I/O、数字I/O以及独立执行（stand-alone）功能,可在单芯片上提供完整的音频处理系统。ADAU1401的功能与ADAU1701相似,但它专为汽车市场设计,可在更宽的温度范围内工作。
SigmaStudio是一种完全图形化的可编程工具,允许用户使用熟悉的音频处理模块（如双二阶滤波器、延迟以及动态处理器）产生信号流。这个设计工具可以直接与SigmaDSP硬件进行连接,SigmaStudio工具还可以用作设计参数的实时控制界面,可以轻松的实现系统调整。面向SigmaDSP的第三方算法,如Dolby® ProLogic®II、Audistry™、Waves MaxxBass®以及SRS® TruSurround XT™,已经无缝集成入SigmaStudio环境中。
| Part# Results: 11 | Instructions/Cycles | Data RAM (k Words) | Digital I/O Channels | Analog I/O Channels | GPIOs | Features | Product Description | Price* (1000 pcs.) |
|---|---|---|---|---|---|---|---|---|
| AD1940 | 1,536 | 6 | 16/16 | 0/0 | - | - | Multichannel 28-/56-bit audio processor with 4-wire SPI control interface | $8.45 |
| AD1941 | 1,536 | 6 | 16/16 | 0/0 | - | - | Multichannel 28-/56-bit audio processor with 2-wire I2C control interface | $8.45 |
| ADAU1401A | 1,024 | 2 | 8/8 | - | 12 | Selfboot from EEPROM, Auxiliary ADCs | 28-/56-bit automotive audio processor with 2 ADCs and 4 DACs | $5.68 |
| ADAU1442 | 3,584 | 8 | 24/24 | 0/0 | 12 | 8x2-ch ASRC, Selfboot from EEPROM, S/PDIF Rx, Aux A/Ds | Digital audio processor with flexible audio routing matrix, 2 × 8-channel ASRC | $9.96 |
| ADAU1445 | 3,584 | 8 | 24/24 | 0/0 | 12 | 2x8-ch ASRC, Selfboot from EEPROM, S/PDIF Rx, Aux A/Ds | Digital audio processor with flexible audio routing matrix, 8 × 2-channel ASRC | $9.31 |
| ADAU1446 | 3,584 | 8 | 24/24 | 0/0 | 12 | Selfboot from EEPROM, Auxiliary ADCs | Digital audio processor with flexible audio routing matrix | $8.28 |
| ADAU1461 | 1,024 | 4 | 8/8 | 2/2 | 4 | Digital Microphone inputs, headphone amp, Frac PLL | Stereo, low power, 96 kHz, 24-bit automotive SigmaDSP audio codec with integrated PLL | $4.89 |
| ADAU1701 | 1,024 | 2 | 8/8 | 2/4 | 12 | Selfboot from EEPROM, Auxiliary ADCs | 28-/56-bit audio processor with 2 ADCs and 4 DACs | $4.52 |
| ADAU1702 | 512 | 0.5 | 8/8 | 2/4 | 12 | Selfboot from EEPROM, Auxiliary ADCs | 28-/56-bit audio processor with 2 ADCs and 4 DACs | $3.57 |
| ADAU1761 | 1,024 | 4 | 8/8 | 2/2 | 4 | Digital Microphone inputs, headphone amp, Frac PLL | Stereo, low power, 96 kHz, 24-bit SigmaDSP audio codec with integrated PLL | $3.91 |
| ADAU1781 | 512 | 0.5 | 8/8 | 2/2 | 5 | Digital microphone inputs, mono speaker amp, Frac PLL | SigmaDSP low-noise stereo audio codec for portable applications | $3.20 |
| Part# Results: 3 | Instructions/Cycles | # ADC Input Channels | # DAC Outputs | DAC DNR (dB) | DAC THD+N @ 1 kHz (-3dB) | ADC THD+N (dB) | Digital I/O Channels | Digital Output PWM Chs | Product Description | Price* (1000 pcs.) |
|---|---|---|---|---|---|---|---|---|---|---|
| ADAV4322 | 2,560 | 4 | 11 | 95 | 85 | -90 | 8/2 | - | Audio Processor for Advanced TV w/ Sound IF Demod & Stereo Decoder | ** |
| ADAV4601 | - | 2 | 6 | 94 | 86 | -90 | - | 8 | Audio Processor for Advanced TV | $6.21 |
| ADAV4622 | 2,560 | 4 | 8 | 94 | 86 | -90 | - | 8 | Audio Processor for Advanced TV with Sound IF Demodulator and Stereo Decoder | $9.58 |
